Optimal location of the two-element rectangular rosette to evaluate the stress intensity factor
In this paper, we propose a new technique that is, at least, as efficient as the technique proposed by Dally and Sanford (DS) [9] to determine the stress intensity factor (SIF) in Mode I. This technique relies on the use of a single or two rectangular rosettes with two elements for a three- or four-...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Mejni, F. [verfasserIn] Kanit, T. [verfasserIn] Nianga, J-M. [verfasserIn] Imad, A. [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2020 |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Theoretical and applied fracture mechanics - Amsterdam : North-Holland, 1984, 109 |
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| Übergeordnetes Werk: |
volume:109 |
| DOI / URN: |
10.1016/j.tafmec.2020.102684 |
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ELV05166285X |
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| 520 | |a In this paper, we propose a new technique that is, at least, as efficient as the technique proposed by Dally and Sanford (DS) [9] to determine the stress intensity factor (SIF) in Mode I. This technique relies on the use of a single or two rectangular rosettes with two elements for a three- or four-term representations of the strain field. The strong point of this technique is that regardless of the type of material used the location angle θ and orientation angle α of rectangular rosette are not changing with respect to the Poisson’s ratio ν . In addition, the angle θ coincides with the angle α and is equal to ± 60 ° , which facilitates the use of this technique in the practice. Moreover, a new formulation of the DS approach is presented. Accordingly, general finite element approaches are developed to estimate the extent validity of the three and four-term representations of the strain field for the two techniques. Results of numerical examples show that the present technique can yield a highly accurate value of SIF when the single or two rectangular rosettes are placed within the valid locations. Furthermore, these results show that the proposed technique and the technique of DS give almost the same precision in the measured SIF values. | ||
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10.1016/j.tafmec.2020.102684 doi (DE-627)ELV05166285X (ELSEVIER)S0167-8442(20)30260-3 DE-627 ger DE-627 rda eng 670 VZ 51.32 bkl Mejni, F. verfasserin aut Optimal location of the two-element rectangular rosette to evaluate the stress intensity factor 2020 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In this paper, we propose a new technique that is, at least, as efficient as the technique proposed by Dally and Sanford (DS) [9] to determine the stress intensity factor (SIF) in Mode I. This technique relies on the use of a single or two rectangular rosettes with two elements for a three- or four-term representations of the strain field. The strong point of this technique is that regardless of the type of material used the location angle θ and orientation angle α of rectangular rosette are not changing with respect to the Poisson’s ratio ν . In addition, the angle θ coincides with the angle α and is equal to ± 60 ° , which facilitates the use of this technique in the practice. Moreover, a new formulation of the DS approach is presented. Accordingly, general finite element approaches are developed to estimate the extent validity of the three and four-term representations of the strain field for the two techniques. Results of numerical examples show that the present technique can yield a highly accurate value of SIF when the single or two rectangular rosettes are placed within the valid locations. Furthermore, these results show that the proposed technique and the technique of DS give almost the same precision in the measured SIF values. Rosette Strain gage Stress intensity factor Mode I Optimal locations Kanit, T. verfasserin aut Nianga, J-M. verfasserin aut Imad, A. verfasserin aut Enthalten in Theoretical and applied fracture mechanics Amsterdam : North-Holland, 1984 109 Online-Ressource (DE-627)320514021 (DE-600)2013739-4 (DE-576)259484814 0167-8442 nnns volume:109 GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 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_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 51.32 Werkstoffmechanik VZ AR 109 |
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10.1016/j.tafmec.2020.102684 doi (DE-627)ELV05166285X (ELSEVIER)S0167-8442(20)30260-3 DE-627 ger DE-627 rda eng 670 VZ 51.32 bkl Mejni, F. verfasserin aut Optimal location of the two-element rectangular rosette to evaluate the stress intensity factor 2020 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In this paper, we propose a new technique that is, at least, as efficient as the technique proposed by Dally and Sanford (DS) [9] to determine the stress intensity factor (SIF) in Mode I. This technique relies on the use of a single or two rectangular rosettes with two elements for a three- or four-term representations of the strain field. The strong point of this technique is that regardless of the type of material used the location angle θ and orientation angle α of rectangular rosette are not changing with respect to the Poisson’s ratio ν . In addition, the angle θ coincides with the angle α and is equal to ± 60 ° , which facilitates the use of this technique in the practice. Moreover, a new formulation of the DS approach is presented. Accordingly, general finite element approaches are developed to estimate the extent validity of the three and four-term representations of the strain field for the two techniques. Results of numerical examples show that the present technique can yield a highly accurate value of SIF when the single or two rectangular rosettes are placed within the valid locations. Furthermore, these results show that the proposed technique and the technique of DS give almost the same precision in the measured SIF values. Rosette Strain gage Stress intensity factor Mode I Optimal locations Kanit, T. verfasserin aut Nianga, J-M. verfasserin aut Imad, A. verfasserin aut Enthalten in Theoretical and applied fracture mechanics Amsterdam : North-Holland, 1984 109 Online-Ressource (DE-627)320514021 (DE-600)2013739-4 (DE-576)259484814 0167-8442 nnns volume:109 GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 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_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 51.32 Werkstoffmechanik VZ AR 109 |
| allfields_unstemmed |
10.1016/j.tafmec.2020.102684 doi (DE-627)ELV05166285X (ELSEVIER)S0167-8442(20)30260-3 DE-627 ger DE-627 rda eng 670 VZ 51.32 bkl Mejni, F. verfasserin aut Optimal location of the two-element rectangular rosette to evaluate the stress intensity factor 2020 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In this paper, we propose a new technique that is, at least, as efficient as the technique proposed by Dally and Sanford (DS) [9] to determine the stress intensity factor (SIF) in Mode I. This technique relies on the use of a single or two rectangular rosettes with two elements for a three- or four-term representations of the strain field. The strong point of this technique is that regardless of the type of material used the location angle θ and orientation angle α of rectangular rosette are not changing with respect to the Poisson’s ratio ν . In addition, the angle θ coincides with the angle α and is equal to ± 60 ° , which facilitates the use of this technique in the practice. Moreover, a new formulation of the DS approach is presented. Accordingly, general finite element approaches are developed to estimate the extent validity of the three and four-term representations of the strain field for the two techniques. Results of numerical examples show that the present technique can yield a highly accurate value of SIF when the single or two rectangular rosettes are placed within the valid locations. Furthermore, these results show that the proposed technique and the technique of DS give almost the same precision in the measured SIF values. Rosette Strain gage Stress intensity factor Mode I Optimal locations Kanit, T. verfasserin aut Nianga, J-M. verfasserin aut Imad, A. verfasserin aut Enthalten in Theoretical and applied fracture mechanics Amsterdam : North-Holland, 1984 109 Online-Ressource (DE-627)320514021 (DE-600)2013739-4 (DE-576)259484814 0167-8442 nnns volume:109 GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 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_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 51.32 Werkstoffmechanik VZ AR 109 |
| allfieldsGer |
10.1016/j.tafmec.2020.102684 doi (DE-627)ELV05166285X (ELSEVIER)S0167-8442(20)30260-3 DE-627 ger DE-627 rda eng 670 VZ 51.32 bkl Mejni, F. verfasserin aut Optimal location of the two-element rectangular rosette to evaluate the stress intensity factor 2020 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In this paper, we propose a new technique that is, at least, as efficient as the technique proposed by Dally and Sanford (DS) [9] to determine the stress intensity factor (SIF) in Mode I. This technique relies on the use of a single or two rectangular rosettes with two elements for a three- or four-term representations of the strain field. The strong point of this technique is that regardless of the type of material used the location angle θ and orientation angle α of rectangular rosette are not changing with respect to the Poisson’s ratio ν . In addition, the angle θ coincides with the angle α and is equal to ± 60 ° , which facilitates the use of this technique in the practice. Moreover, a new formulation of the DS approach is presented. Accordingly, general finite element approaches are developed to estimate the extent validity of the three and four-term representations of the strain field for the two techniques. Results of numerical examples show that the present technique can yield a highly accurate value of SIF when the single or two rectangular rosettes are placed within the valid locations. Furthermore, these results show that the proposed technique and the technique of DS give almost the same precision in the measured SIF values. Rosette Strain gage Stress intensity factor Mode I Optimal locations Kanit, T. verfasserin aut Nianga, J-M. verfasserin aut Imad, A. verfasserin aut Enthalten in Theoretical and applied fracture mechanics Amsterdam : North-Holland, 1984 109 Online-Ressource (DE-627)320514021 (DE-600)2013739-4 (DE-576)259484814 0167-8442 nnns volume:109 GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 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_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 51.32 Werkstoffmechanik VZ AR 109 |
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10.1016/j.tafmec.2020.102684 doi (DE-627)ELV05166285X (ELSEVIER)S0167-8442(20)30260-3 DE-627 ger DE-627 rda eng 670 VZ 51.32 bkl Mejni, F. verfasserin aut Optimal location of the two-element rectangular rosette to evaluate the stress intensity factor 2020 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In this paper, we propose a new technique that is, at least, as efficient as the technique proposed by Dally and Sanford (DS) [9] to determine the stress intensity factor (SIF) in Mode I. This technique relies on the use of a single or two rectangular rosettes with two elements for a three- or four-term representations of the strain field. The strong point of this technique is that regardless of the type of material used the location angle θ and orientation angle α of rectangular rosette are not changing with respect to the Poisson’s ratio ν . In addition, the angle θ coincides with the angle α and is equal to ± 60 ° , which facilitates the use of this technique in the practice. Moreover, a new formulation of the DS approach is presented. Accordingly, general finite element approaches are developed to estimate the extent validity of the three and four-term representations of the strain field for the two techniques. Results of numerical examples show that the present technique can yield a highly accurate value of SIF when the single or two rectangular rosettes are placed within the valid locations. Furthermore, these results show that the proposed technique and the technique of DS give almost the same precision in the measured SIF values. Rosette Strain gage Stress intensity factor Mode I Optimal locations Kanit, T. verfasserin aut Nianga, J-M. verfasserin aut Imad, A. verfasserin aut Enthalten in Theoretical and applied fracture mechanics Amsterdam : North-Holland, 1984 109 Online-Ressource (DE-627)320514021 (DE-600)2013739-4 (DE-576)259484814 0167-8442 nnns volume:109 GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 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_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 51.32 Werkstoffmechanik VZ AR 109 |
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Optimal location of the two-element rectangular rosette to evaluate the stress intensity factor |
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Optimal location of the two-element rectangular rosette to evaluate the stress intensity factor |
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Mejni, F. |
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Theoretical and applied fracture mechanics |
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Mejni, F. Kanit, T. Nianga, J-M. Imad, A. |
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10.1016/j.tafmec.2020.102684 |
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optimal location of the two-element rectangular rosette to evaluate the stress intensity factor |
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Optimal location of the two-element rectangular rosette to evaluate the stress intensity factor |
| abstract |
In this paper, we propose a new technique that is, at least, as efficient as the technique proposed by Dally and Sanford (DS) [9] to determine the stress intensity factor (SIF) in Mode I. This technique relies on the use of a single or two rectangular rosettes with two elements for a three- or four-term representations of the strain field. The strong point of this technique is that regardless of the type of material used the location angle θ and orientation angle α of rectangular rosette are not changing with respect to the Poisson’s ratio ν . In addition, the angle θ coincides with the angle α and is equal to ± 60 ° , which facilitates the use of this technique in the practice. Moreover, a new formulation of the DS approach is presented. Accordingly, general finite element approaches are developed to estimate the extent validity of the three and four-term representations of the strain field for the two techniques. Results of numerical examples show that the present technique can yield a highly accurate value of SIF when the single or two rectangular rosettes are placed within the valid locations. Furthermore, these results show that the proposed technique and the technique of DS give almost the same precision in the measured SIF values. |
| abstractGer |
In this paper, we propose a new technique that is, at least, as efficient as the technique proposed by Dally and Sanford (DS) [9] to determine the stress intensity factor (SIF) in Mode I. This technique relies on the use of a single or two rectangular rosettes with two elements for a three- or four-term representations of the strain field. The strong point of this technique is that regardless of the type of material used the location angle θ and orientation angle α of rectangular rosette are not changing with respect to the Poisson’s ratio ν . In addition, the angle θ coincides with the angle α and is equal to ± 60 ° , which facilitates the use of this technique in the practice. Moreover, a new formulation of the DS approach is presented. Accordingly, general finite element approaches are developed to estimate the extent validity of the three and four-term representations of the strain field for the two techniques. Results of numerical examples show that the present technique can yield a highly accurate value of SIF when the single or two rectangular rosettes are placed within the valid locations. Furthermore, these results show that the proposed technique and the technique of DS give almost the same precision in the measured SIF values. |
| abstract_unstemmed |
In this paper, we propose a new technique that is, at least, as efficient as the technique proposed by Dally and Sanford (DS) [9] to determine the stress intensity factor (SIF) in Mode I. This technique relies on the use of a single or two rectangular rosettes with two elements for a three- or four-term representations of the strain field. The strong point of this technique is that regardless of the type of material used the location angle θ and orientation angle α of rectangular rosette are not changing with respect to the Poisson’s ratio ν . In addition, the angle θ coincides with the angle α and is equal to ± 60 ° , which facilitates the use of this technique in the practice. Moreover, a new formulation of the DS approach is presented. Accordingly, general finite element approaches are developed to estimate the extent validity of the three and four-term representations of the strain field for the two techniques. Results of numerical examples show that the present technique can yield a highly accurate value of SIF when the single or two rectangular rosettes are placed within the valid locations. Furthermore, these results show that the proposed technique and the technique of DS give almost the same precision in the measured SIF values. |
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