Prediction of indentation-load dependence of fracture strengths from R-curves of toughened ceramics

Abstract Rising-crack-growth resistance or R-curves evaluated by direct measurements of crack lengths associated with indentation flaws in a sintered silicon nitride and a sintered and isostatically hot pressed (HIPed) SiC (whisker)-reinforced alumina were used to predict the corresponding indentati...
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Autor*in:	Ramachandran, N. [verfasserIn] Shetty, D. K. [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	1993

Schlagwörter:	Nitride Crack Length Exponential Function Material Processing Linear Relation

Übergeordnetes Werk:	Enthalten in: Journal of materials science - Dordrecht [u.a.] : Springer Science + Business Media B.V, 1966, 28(1993), 22 vom: Nov., Seite 6120-6126
Übergeordnetes Werk:	volume:28 ; year:1993 ; number:22 ; month:11 ; pages:6120-6126

Links:	Volltext

DOI / URN:	10.1007/BF00365032

Katalog-ID:	SPR013773461

Internformat


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245	1	0	\|a Prediction of indentation-load dependence of fracture strengths from R-curves of toughened ceramics
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520			\|a Abstract Rising-crack-growth resistance or R-curves evaluated by direct measurements of crack lengths associated with indentation flaws in a sintered silicon nitride and a sintered and isostatically hot pressed (HIPed) SiC (whisker)-reinforced alumina were used to predict the corresponding indentation-load dependence of fracture strengths. Two empirical R-curve functions, a power law and an exponential function, were fitted to the R-curve data for the analysis. Fracture strengths were calculated by a combined numerical and graphical procedure that determined the point of tangency between crack-driving forces and the R-curves. The results revealed that the exponential function gave a better prediction of the measured log fracture-strength versus log indentation-load relation than the power law. The exponential function also predicted a nearly linear relation between log fracture-strength and log indentation-load, thus indicating that the apparent linearity of this plot is not adequate evidence to assume a power-law R-curve function. This study, therefore, reinforces the case for R-curve evaluations to be based on direct crack-length measurements rather than strength measurements, because the indentation-load dependence of the fracture strength is not sufficiently sensitive to discriminate between potential R-curve functions.
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700	1		\|a Shetty, D. K. \|e verfasserin \|4 aut
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author_variant	n r nr d k s dk dks
matchkey_str	article:15734803:1993----::rdcinfnettoladpnecofatrsrntsrmc
hierarchy_sort_str	1993
bklnumber	51.00
publishDate	1993
allfields	10.1007/BF00365032 doi (DE-627)SPR013773461 (SPR)BF00365032-e DE-627 ger DE-627 rakwb eng 670 ASE 51.00 bkl Ramachandran, N. verfasserin aut Prediction of indentation-load dependence of fracture strengths from R-curves of toughened ceramics 1993 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Rising-crack-growth resistance or R-curves evaluated by direct measurements of crack lengths associated with indentation flaws in a sintered silicon nitride and a sintered and isostatically hot pressed (HIPed) SiC (whisker)-reinforced alumina were used to predict the corresponding indentation-load dependence of fracture strengths. Two empirical R-curve functions, a power law and an exponential function, were fitted to the R-curve data for the analysis. Fracture strengths were calculated by a combined numerical and graphical procedure that determined the point of tangency between crack-driving forces and the R-curves. The results revealed that the exponential function gave a better prediction of the measured log fracture-strength versus log indentation-load relation than the power law. The exponential function also predicted a nearly linear relation between log fracture-strength and log indentation-load, thus indicating that the apparent linearity of this plot is not adequate evidence to assume a power-law R-curve function. This study, therefore, reinforces the case for R-curve evaluations to be based on direct crack-length measurements rather than strength measurements, because the indentation-load dependence of the fracture strength is not sufficiently sensitive to discriminate between potential R-curve functions. Nitride (dpeaa)DE-He213 Crack Length (dpeaa)DE-He213 Exponential Function (dpeaa)DE-He213 Material Processing (dpeaa)DE-He213 Linear Relation (dpeaa)DE-He213 Shetty, D. K. verfasserin aut Enthalten in Journal of materials science Dordrecht [u.a.] : Springer Science + Business Media B.V, 1966 28(1993), 22 vom: Nov., Seite 6120-6126 (DE-627)315293969 (DE-600)2015305-3 1573-4803 nnns volume:28 year:1993 number:22 month:11 pages:6120-6126 https://dx.doi.org/10.1007/BF00365032 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_121 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_224 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_374 GBV_ILN_602 GBV_ILN_647 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2043 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2158 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2193 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_2808 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4346 GBV_ILN_4367 GBV_ILN_4393 GBV_ILN_4700 GBV_ILN_4753 51.00 ASE AR 28 1993 22 11 6120-6126
spelling	10.1007/BF00365032 doi (DE-627)SPR013773461 (SPR)BF00365032-e DE-627 ger DE-627 rakwb eng 670 ASE 51.00 bkl Ramachandran, N. verfasserin aut Prediction of indentation-load dependence of fracture strengths from R-curves of toughened ceramics 1993 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Rising-crack-growth resistance or R-curves evaluated by direct measurements of crack lengths associated with indentation flaws in a sintered silicon nitride and a sintered and isostatically hot pressed (HIPed) SiC (whisker)-reinforced alumina were used to predict the corresponding indentation-load dependence of fracture strengths. Two empirical R-curve functions, a power law and an exponential function, were fitted to the R-curve data for the analysis. Fracture strengths were calculated by a combined numerical and graphical procedure that determined the point of tangency between crack-driving forces and the R-curves. The results revealed that the exponential function gave a better prediction of the measured log fracture-strength versus log indentation-load relation than the power law. The exponential function also predicted a nearly linear relation between log fracture-strength and log indentation-load, thus indicating that the apparent linearity of this plot is not adequate evidence to assume a power-law R-curve function. This study, therefore, reinforces the case for R-curve evaluations to be based on direct crack-length measurements rather than strength measurements, because the indentation-load dependence of the fracture strength is not sufficiently sensitive to discriminate between potential R-curve functions. Nitride (dpeaa)DE-He213 Crack Length (dpeaa)DE-He213 Exponential Function (dpeaa)DE-He213 Material Processing (dpeaa)DE-He213 Linear Relation (dpeaa)DE-He213 Shetty, D. K. verfasserin aut Enthalten in Journal of materials science Dordrecht [u.a.] : Springer Science + Business Media B.V, 1966 28(1993), 22 vom: Nov., Seite 6120-6126 (DE-627)315293969 (DE-600)2015305-3 1573-4803 nnns volume:28 year:1993 number:22 month:11 pages:6120-6126 https://dx.doi.org/10.1007/BF00365032 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_121 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_224 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_374 GBV_ILN_602 GBV_ILN_647 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2043 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2158 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2193 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_2808 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4346 GBV_ILN_4367 GBV_ILN_4393 GBV_ILN_4700 GBV_ILN_4753 51.00 ASE AR 28 1993 22 11 6120-6126
allfields_unstemmed	10.1007/BF00365032 doi (DE-627)SPR013773461 (SPR)BF00365032-e DE-627 ger DE-627 rakwb eng 670 ASE 51.00 bkl Ramachandran, N. verfasserin aut Prediction of indentation-load dependence of fracture strengths from R-curves of toughened ceramics 1993 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Rising-crack-growth resistance or R-curves evaluated by direct measurements of crack lengths associated with indentation flaws in a sintered silicon nitride and a sintered and isostatically hot pressed (HIPed) SiC (whisker)-reinforced alumina were used to predict the corresponding indentation-load dependence of fracture strengths. Two empirical R-curve functions, a power law and an exponential function, were fitted to the R-curve data for the analysis. Fracture strengths were calculated by a combined numerical and graphical procedure that determined the point of tangency between crack-driving forces and the R-curves. The results revealed that the exponential function gave a better prediction of the measured log fracture-strength versus log indentation-load relation than the power law. The exponential function also predicted a nearly linear relation between log fracture-strength and log indentation-load, thus indicating that the apparent linearity of this plot is not adequate evidence to assume a power-law R-curve function. This study, therefore, reinforces the case for R-curve evaluations to be based on direct crack-length measurements rather than strength measurements, because the indentation-load dependence of the fracture strength is not sufficiently sensitive to discriminate between potential R-curve functions. Nitride (dpeaa)DE-He213 Crack Length (dpeaa)DE-He213 Exponential Function (dpeaa)DE-He213 Material Processing (dpeaa)DE-He213 Linear Relation (dpeaa)DE-He213 Shetty, D. K. verfasserin aut Enthalten in Journal of materials science Dordrecht [u.a.] : Springer Science + Business Media B.V, 1966 28(1993), 22 vom: Nov., Seite 6120-6126 (DE-627)315293969 (DE-600)2015305-3 1573-4803 nnns volume:28 year:1993 number:22 month:11 pages:6120-6126 https://dx.doi.org/10.1007/BF00365032 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_121 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_224 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_374 GBV_ILN_602 GBV_ILN_647 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2043 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2158 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2193 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_2808 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4346 GBV_ILN_4367 GBV_ILN_4393 GBV_ILN_4700 GBV_ILN_4753 51.00 ASE AR 28 1993 22 11 6120-6126
allfieldsGer	10.1007/BF00365032 doi (DE-627)SPR013773461 (SPR)BF00365032-e DE-627 ger DE-627 rakwb eng 670 ASE 51.00 bkl Ramachandran, N. verfasserin aut Prediction of indentation-load dependence of fracture strengths from R-curves of toughened ceramics 1993 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Rising-crack-growth resistance or R-curves evaluated by direct measurements of crack lengths associated with indentation flaws in a sintered silicon nitride and a sintered and isostatically hot pressed (HIPed) SiC (whisker)-reinforced alumina were used to predict the corresponding indentation-load dependence of fracture strengths. Two empirical R-curve functions, a power law and an exponential function, were fitted to the R-curve data for the analysis. Fracture strengths were calculated by a combined numerical and graphical procedure that determined the point of tangency between crack-driving forces and the R-curves. The results revealed that the exponential function gave a better prediction of the measured log fracture-strength versus log indentation-load relation than the power law. The exponential function also predicted a nearly linear relation between log fracture-strength and log indentation-load, thus indicating that the apparent linearity of this plot is not adequate evidence to assume a power-law R-curve function. This study, therefore, reinforces the case for R-curve evaluations to be based on direct crack-length measurements rather than strength measurements, because the indentation-load dependence of the fracture strength is not sufficiently sensitive to discriminate between potential R-curve functions. Nitride (dpeaa)DE-He213 Crack Length (dpeaa)DE-He213 Exponential Function (dpeaa)DE-He213 Material Processing (dpeaa)DE-He213 Linear Relation (dpeaa)DE-He213 Shetty, D. K. verfasserin aut Enthalten in Journal of materials science Dordrecht [u.a.] : Springer Science + Business Media B.V, 1966 28(1993), 22 vom: Nov., Seite 6120-6126 (DE-627)315293969 (DE-600)2015305-3 1573-4803 nnns volume:28 year:1993 number:22 month:11 pages:6120-6126 https://dx.doi.org/10.1007/BF00365032 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_121 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_224 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_374 GBV_ILN_602 GBV_ILN_647 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2043 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2158 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2193 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_2808 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4346 GBV_ILN_4367 GBV_ILN_4393 GBV_ILN_4700 GBV_ILN_4753 51.00 ASE AR 28 1993 22 11 6120-6126
allfieldsSound	10.1007/BF00365032 doi (DE-627)SPR013773461 (SPR)BF00365032-e DE-627 ger DE-627 rakwb eng 670 ASE 51.00 bkl Ramachandran, N. verfasserin aut Prediction of indentation-load dependence of fracture strengths from R-curves of toughened ceramics 1993 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Rising-crack-growth resistance or R-curves evaluated by direct measurements of crack lengths associated with indentation flaws in a sintered silicon nitride and a sintered and isostatically hot pressed (HIPed) SiC (whisker)-reinforced alumina were used to predict the corresponding indentation-load dependence of fracture strengths. Two empirical R-curve functions, a power law and an exponential function, were fitted to the R-curve data for the analysis. Fracture strengths were calculated by a combined numerical and graphical procedure that determined the point of tangency between crack-driving forces and the R-curves. The results revealed that the exponential function gave a better prediction of the measured log fracture-strength versus log indentation-load relation than the power law. The exponential function also predicted a nearly linear relation between log fracture-strength and log indentation-load, thus indicating that the apparent linearity of this plot is not adequate evidence to assume a power-law R-curve function. This study, therefore, reinforces the case for R-curve evaluations to be based on direct crack-length measurements rather than strength measurements, because the indentation-load dependence of the fracture strength is not sufficiently sensitive to discriminate between potential R-curve functions. Nitride (dpeaa)DE-He213 Crack Length (dpeaa)DE-He213 Exponential Function (dpeaa)DE-He213 Material Processing (dpeaa)DE-He213 Linear Relation (dpeaa)DE-He213 Shetty, D. K. verfasserin aut Enthalten in Journal of materials science Dordrecht [u.a.] : Springer Science + Business Media B.V, 1966 28(1993), 22 vom: Nov., Seite 6120-6126 (DE-627)315293969 (DE-600)2015305-3 1573-4803 nnns volume:28 year:1993 number:22 month:11 pages:6120-6126 https://dx.doi.org/10.1007/BF00365032 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_121 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_224 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_374 GBV_ILN_602 GBV_ILN_647 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2043 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2158 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2193 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_2808 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4346 GBV_ILN_4367 GBV_ILN_4393 GBV_ILN_4700 GBV_ILN_4753 51.00 ASE AR 28 1993 22 11 6120-6126
language	English
source	Enthalten in Journal of materials science 28(1993), 22 vom: Nov., Seite 6120-6126 volume:28 year:1993 number:22 month:11 pages:6120-6126
sourceStr	Enthalten in Journal of materials science 28(1993), 22 vom: Nov., Seite 6120-6126 volume:28 year:1993 number:22 month:11 pages:6120-6126
format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	Nitride Crack Length Exponential Function Material Processing Linear Relation
dewey-raw	670
isfreeaccess_bool	false
container_title	Journal of materials science
authorswithroles_txt_mv	Ramachandran, N. @@aut@@ Shetty, D. K. @@aut@@
publishDateDaySort_date	1993-11-01T00:00:00Z
hierarchy_top_id	315293969
dewey-sort	3670
id	SPR013773461
language_de	englisch
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author	Ramachandran, N.
spellingShingle	Ramachandran, N. ddc 670 bkl 51.00 misc Nitride misc Crack Length misc Exponential Function misc Material Processing misc Linear Relation Prediction of indentation-load dependence of fracture strengths from R-curves of toughened ceramics
authorStr	Ramachandran, N.
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topic_title	670 ASE 51.00 bkl Prediction of indentation-load dependence of fracture strengths from R-curves of toughened ceramics Nitride (dpeaa)DE-He213 Crack Length (dpeaa)DE-He213 Exponential Function (dpeaa)DE-He213 Material Processing (dpeaa)DE-He213 Linear Relation (dpeaa)DE-He213
topic	ddc 670 bkl 51.00 misc Nitride misc Crack Length misc Exponential Function misc Material Processing misc Linear Relation
topic_unstemmed	ddc 670 bkl 51.00 misc Nitride misc Crack Length misc Exponential Function misc Material Processing misc Linear Relation
topic_browse	ddc 670 bkl 51.00 misc Nitride misc Crack Length misc Exponential Function misc Material Processing misc Linear Relation
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title	Prediction of indentation-load dependence of fracture strengths from R-curves of toughened ceramics
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title_full	Prediction of indentation-load dependence of fracture strengths from R-curves of toughened ceramics
author_sort	Ramachandran, N.
journal	Journal of materials science
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author_browse	Ramachandran, N. Shetty, D. K.
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title_sort	prediction of indentation-load dependence of fracture strengths from r-curves of toughened ceramics
title_auth	Prediction of indentation-load dependence of fracture strengths from R-curves of toughened ceramics
abstract	Abstract Rising-crack-growth resistance or R-curves evaluated by direct measurements of crack lengths associated with indentation flaws in a sintered silicon nitride and a sintered and isostatically hot pressed (HIPed) SiC (whisker)-reinforced alumina were used to predict the corresponding indentation-load dependence of fracture strengths. Two empirical R-curve functions, a power law and an exponential function, were fitted to the R-curve data for the analysis. Fracture strengths were calculated by a combined numerical and graphical procedure that determined the point of tangency between crack-driving forces and the R-curves. The results revealed that the exponential function gave a better prediction of the measured log fracture-strength versus log indentation-load relation than the power law. The exponential function also predicted a nearly linear relation between log fracture-strength and log indentation-load, thus indicating that the apparent linearity of this plot is not adequate evidence to assume a power-law R-curve function. This study, therefore, reinforces the case for R-curve evaluations to be based on direct crack-length measurements rather than strength measurements, because the indentation-load dependence of the fracture strength is not sufficiently sensitive to discriminate between potential R-curve functions.
abstractGer	Abstract Rising-crack-growth resistance or R-curves evaluated by direct measurements of crack lengths associated with indentation flaws in a sintered silicon nitride and a sintered and isostatically hot pressed (HIPed) SiC (whisker)-reinforced alumina were used to predict the corresponding indentation-load dependence of fracture strengths. Two empirical R-curve functions, a power law and an exponential function, were fitted to the R-curve data for the analysis. Fracture strengths were calculated by a combined numerical and graphical procedure that determined the point of tangency between crack-driving forces and the R-curves. The results revealed that the exponential function gave a better prediction of the measured log fracture-strength versus log indentation-load relation than the power law. The exponential function also predicted a nearly linear relation between log fracture-strength and log indentation-load, thus indicating that the apparent linearity of this plot is not adequate evidence to assume a power-law R-curve function. This study, therefore, reinforces the case for R-curve evaluations to be based on direct crack-length measurements rather than strength measurements, because the indentation-load dependence of the fracture strength is not sufficiently sensitive to discriminate between potential R-curve functions.
abstract_unstemmed	Abstract Rising-crack-growth resistance or R-curves evaluated by direct measurements of crack lengths associated with indentation flaws in a sintered silicon nitride and a sintered and isostatically hot pressed (HIPed) SiC (whisker)-reinforced alumina were used to predict the corresponding indentation-load dependence of fracture strengths. Two empirical R-curve functions, a power law and an exponential function, were fitted to the R-curve data for the analysis. Fracture strengths were calculated by a combined numerical and graphical procedure that determined the point of tangency between crack-driving forces and the R-curves. The results revealed that the exponential function gave a better prediction of the measured log fracture-strength versus log indentation-load relation than the power law. The exponential function also predicted a nearly linear relation between log fracture-strength and log indentation-load, thus indicating that the apparent linearity of this plot is not adequate evidence to assume a power-law R-curve function. This study, therefore, reinforces the case for R-curve evaluations to be based on direct crack-length measurements rather than strength measurements, because the indentation-load dependence of the fracture strength is not sufficiently sensitive to discriminate between potential R-curve functions.
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container_issue	22
title_short	Prediction of indentation-load dependence of fracture strengths from R-curves of toughened ceramics
url	https://dx.doi.org/10.1007/BF00365032
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author2	Shetty, D. K.
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up_date	2024-07-03T22:04:04.473Z
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Two empirical R-curve functions, a power law and an exponential function, were fitted to the R-curve data for the analysis. Fracture strengths were calculated by a combined numerical and graphical procedure that determined the point of tangency between crack-driving forces and the R-curves. The results revealed that the exponential function gave a better prediction of the measured log fracture-strength versus log indentation-load relation than the power law. The exponential function also predicted a nearly linear relation between log fracture-strength and log indentation-load, thus indicating that the apparent linearity of this plot is not adequate evidence to assume a power-law R-curve function. 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Prediction of indentation-load dependence of fracture strengths from R-curves of toughened ceramics

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