Strength and stiffness of sandwich beams in bending

Abstract This investigation is concerned with the experimental versus analytical correlation of the mechanical properties of sandwich-beam specimens. Such sandwich structures are commonly employed in the aircraft industry. Four-point and three-point load tests were conducted on a large number of san...
Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Lingaiah, K. [verfasserIn] Suryanarayana, B. G.

Format:	Artikel
Sprache:	Englisch

Erschienen:	1991

Schlagwörter:	Failure Load Sandwich Structure Shear Stiffness Sandwich Beam Flexural Stiffness

Anmerkung:	© Society for Experimental Mechanics, Inc. 1991

Übergeordnetes Werk:	Enthalten in: Experimental mechanics - Kluwer Academic Publishers, 1961, 31(1991), 1 vom: März, Seite 1-7
Übergeordnetes Werk:	volume:31 ; year:1991 ; number:1 ; month:03 ; pages:1-7

Links:	Volltext

DOI / URN:	10.1007/BF02325715

Katalog-ID:	OLC2058164520

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650		4	\|a Failure Load
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allfields	10.1007/BF02325715 doi (DE-627)OLC2058164520 (DE-He213)BF02325715-p DE-627 ger DE-627 rakwb eng 690 VZ Lingaiah, K. verfasserin aut Strength and stiffness of sandwich beams in bending 1991 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Society for Experimental Mechanics, Inc. 1991 Abstract This investigation is concerned with the experimental versus analytical correlation of the mechanical properties of sandwich-beam specimens. Such sandwich structures are commonly employed in the aircraft industry. Four-point and three-point load tests were conducted on a large number of sandwich-beam specimens, fabricated by using fiber-glass reinforced plastics (both unidirectional and woven-glass cloth) and DTD 685 aluminum alloy for the facings with aluminum honeycomb core and polyurethane foam cores and the indigenously available Araldite as the bonding medium between the core and the facings. The flexural stiffness of the composite sandwich specimens used in this investigation compared favorably with theoretical predictions. The shear stiffness was found to be about 55 percent and 45 percent of the theoretically predicted values for FRP (fiberglass-reinforced-plastic) cloth and FRP unidirectional laminates with aluminum honeycomb core sandwich, respectively. The failure load as determined by experiments was less than the theoretically predicted safe load. There was a loss of strength as well as a steep decrease in the failure load in the case of low density foam core. It was concluded that FRP facing plates with aluminum honeycomb core sandwich structure may be preferred to similar aluminum-alloy facing sandwich construction if high flexural stiffness and shear stiffness properties are required at less cost and weight. Indigenously available Araldite was quite satisfactory for bonding the core to the facings. This investigation has confirmed the importance of experiments in the field of sandwich structures which can effectively replace other conventional uneconomical structural or machine members which are currently in use. Failure Load Sandwich Structure Shear Stiffness Sandwich Beam Flexural Stiffness Suryanarayana, B. G. aut Enthalten in Experimental mechanics Kluwer Academic Publishers, 1961 31(1991), 1 vom: März, Seite 1-7 (DE-627)129593990 (DE-600)240480-1 (DE-576)015086852 0014-4851 nnns volume:31 year:1991 number:1 month:03 pages:1-7 https://doi.org/10.1007/BF02325715 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_70 GBV_ILN_2004 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_4046 GBV_ILN_4307 GBV_ILN_4319 GBV_ILN_4700 AR 31 1991 1 03 1-7
spelling	10.1007/BF02325715 doi (DE-627)OLC2058164520 (DE-He213)BF02325715-p DE-627 ger DE-627 rakwb eng 690 VZ Lingaiah, K. verfasserin aut Strength and stiffness of sandwich beams in bending 1991 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Society for Experimental Mechanics, Inc. 1991 Abstract This investigation is concerned with the experimental versus analytical correlation of the mechanical properties of sandwich-beam specimens. Such sandwich structures are commonly employed in the aircraft industry. Four-point and three-point load tests were conducted on a large number of sandwich-beam specimens, fabricated by using fiber-glass reinforced plastics (both unidirectional and woven-glass cloth) and DTD 685 aluminum alloy for the facings with aluminum honeycomb core and polyurethane foam cores and the indigenously available Araldite as the bonding medium between the core and the facings. The flexural stiffness of the composite sandwich specimens used in this investigation compared favorably with theoretical predictions. The shear stiffness was found to be about 55 percent and 45 percent of the theoretically predicted values for FRP (fiberglass-reinforced-plastic) cloth and FRP unidirectional laminates with aluminum honeycomb core sandwich, respectively. The failure load as determined by experiments was less than the theoretically predicted safe load. There was a loss of strength as well as a steep decrease in the failure load in the case of low density foam core. It was concluded that FRP facing plates with aluminum honeycomb core sandwich structure may be preferred to similar aluminum-alloy facing sandwich construction if high flexural stiffness and shear stiffness properties are required at less cost and weight. Indigenously available Araldite was quite satisfactory for bonding the core to the facings. This investigation has confirmed the importance of experiments in the field of sandwich structures which can effectively replace other conventional uneconomical structural or machine members which are currently in use. Failure Load Sandwich Structure Shear Stiffness Sandwich Beam Flexural Stiffness Suryanarayana, B. G. aut Enthalten in Experimental mechanics Kluwer Academic Publishers, 1961 31(1991), 1 vom: März, Seite 1-7 (DE-627)129593990 (DE-600)240480-1 (DE-576)015086852 0014-4851 nnns volume:31 year:1991 number:1 month:03 pages:1-7 https://doi.org/10.1007/BF02325715 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_70 GBV_ILN_2004 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_4046 GBV_ILN_4307 GBV_ILN_4319 GBV_ILN_4700 AR 31 1991 1 03 1-7
allfields_unstemmed	10.1007/BF02325715 doi (DE-627)OLC2058164520 (DE-He213)BF02325715-p DE-627 ger DE-627 rakwb eng 690 VZ Lingaiah, K. verfasserin aut Strength and stiffness of sandwich beams in bending 1991 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Society for Experimental Mechanics, Inc. 1991 Abstract This investigation is concerned with the experimental versus analytical correlation of the mechanical properties of sandwich-beam specimens. Such sandwich structures are commonly employed in the aircraft industry. Four-point and three-point load tests were conducted on a large number of sandwich-beam specimens, fabricated by using fiber-glass reinforced plastics (both unidirectional and woven-glass cloth) and DTD 685 aluminum alloy for the facings with aluminum honeycomb core and polyurethane foam cores and the indigenously available Araldite as the bonding medium between the core and the facings. The flexural stiffness of the composite sandwich specimens used in this investigation compared favorably with theoretical predictions. The shear stiffness was found to be about 55 percent and 45 percent of the theoretically predicted values for FRP (fiberglass-reinforced-plastic) cloth and FRP unidirectional laminates with aluminum honeycomb core sandwich, respectively. The failure load as determined by experiments was less than the theoretically predicted safe load. There was a loss of strength as well as a steep decrease in the failure load in the case of low density foam core. It was concluded that FRP facing plates with aluminum honeycomb core sandwich structure may be preferred to similar aluminum-alloy facing sandwich construction if high flexural stiffness and shear stiffness properties are required at less cost and weight. Indigenously available Araldite was quite satisfactory for bonding the core to the facings. This investigation has confirmed the importance of experiments in the field of sandwich structures which can effectively replace other conventional uneconomical structural or machine members which are currently in use. Failure Load Sandwich Structure Shear Stiffness Sandwich Beam Flexural Stiffness Suryanarayana, B. G. aut Enthalten in Experimental mechanics Kluwer Academic Publishers, 1961 31(1991), 1 vom: März, Seite 1-7 (DE-627)129593990 (DE-600)240480-1 (DE-576)015086852 0014-4851 nnns volume:31 year:1991 number:1 month:03 pages:1-7 https://doi.org/10.1007/BF02325715 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_70 GBV_ILN_2004 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_4046 GBV_ILN_4307 GBV_ILN_4319 GBV_ILN_4700 AR 31 1991 1 03 1-7
allfieldsGer	10.1007/BF02325715 doi (DE-627)OLC2058164520 (DE-He213)BF02325715-p DE-627 ger DE-627 rakwb eng 690 VZ Lingaiah, K. verfasserin aut Strength and stiffness of sandwich beams in bending 1991 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Society for Experimental Mechanics, Inc. 1991 Abstract This investigation is concerned with the experimental versus analytical correlation of the mechanical properties of sandwich-beam specimens. Such sandwich structures are commonly employed in the aircraft industry. Four-point and three-point load tests were conducted on a large number of sandwich-beam specimens, fabricated by using fiber-glass reinforced plastics (both unidirectional and woven-glass cloth) and DTD 685 aluminum alloy for the facings with aluminum honeycomb core and polyurethane foam cores and the indigenously available Araldite as the bonding medium between the core and the facings. The flexural stiffness of the composite sandwich specimens used in this investigation compared favorably with theoretical predictions. The shear stiffness was found to be about 55 percent and 45 percent of the theoretically predicted values for FRP (fiberglass-reinforced-plastic) cloth and FRP unidirectional laminates with aluminum honeycomb core sandwich, respectively. The failure load as determined by experiments was less than the theoretically predicted safe load. There was a loss of strength as well as a steep decrease in the failure load in the case of low density foam core. It was concluded that FRP facing plates with aluminum honeycomb core sandwich structure may be preferred to similar aluminum-alloy facing sandwich construction if high flexural stiffness and shear stiffness properties are required at less cost and weight. Indigenously available Araldite was quite satisfactory for bonding the core to the facings. This investigation has confirmed the importance of experiments in the field of sandwich structures which can effectively replace other conventional uneconomical structural or machine members which are currently in use. Failure Load Sandwich Structure Shear Stiffness Sandwich Beam Flexural Stiffness Suryanarayana, B. G. aut Enthalten in Experimental mechanics Kluwer Academic Publishers, 1961 31(1991), 1 vom: März, Seite 1-7 (DE-627)129593990 (DE-600)240480-1 (DE-576)015086852 0014-4851 nnns volume:31 year:1991 number:1 month:03 pages:1-7 https://doi.org/10.1007/BF02325715 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_70 GBV_ILN_2004 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_4046 GBV_ILN_4307 GBV_ILN_4319 GBV_ILN_4700 AR 31 1991 1 03 1-7
allfieldsSound	10.1007/BF02325715 doi (DE-627)OLC2058164520 (DE-He213)BF02325715-p DE-627 ger DE-627 rakwb eng 690 VZ Lingaiah, K. verfasserin aut Strength and stiffness of sandwich beams in bending 1991 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Society for Experimental Mechanics, Inc. 1991 Abstract This investigation is concerned with the experimental versus analytical correlation of the mechanical properties of sandwich-beam specimens. Such sandwich structures are commonly employed in the aircraft industry. Four-point and three-point load tests were conducted on a large number of sandwich-beam specimens, fabricated by using fiber-glass reinforced plastics (both unidirectional and woven-glass cloth) and DTD 685 aluminum alloy for the facings with aluminum honeycomb core and polyurethane foam cores and the indigenously available Araldite as the bonding medium between the core and the facings. The flexural stiffness of the composite sandwich specimens used in this investigation compared favorably with theoretical predictions. The shear stiffness was found to be about 55 percent and 45 percent of the theoretically predicted values for FRP (fiberglass-reinforced-plastic) cloth and FRP unidirectional laminates with aluminum honeycomb core sandwich, respectively. The failure load as determined by experiments was less than the theoretically predicted safe load. There was a loss of strength as well as a steep decrease in the failure load in the case of low density foam core. It was concluded that FRP facing plates with aluminum honeycomb core sandwich structure may be preferred to similar aluminum-alloy facing sandwich construction if high flexural stiffness and shear stiffness properties are required at less cost and weight. Indigenously available Araldite was quite satisfactory for bonding the core to the facings. This investigation has confirmed the importance of experiments in the field of sandwich structures which can effectively replace other conventional uneconomical structural or machine members which are currently in use. Failure Load Sandwich Structure Shear Stiffness Sandwich Beam Flexural Stiffness Suryanarayana, B. G. aut Enthalten in Experimental mechanics Kluwer Academic Publishers, 1961 31(1991), 1 vom: März, Seite 1-7 (DE-627)129593990 (DE-600)240480-1 (DE-576)015086852 0014-4851 nnns volume:31 year:1991 number:1 month:03 pages:1-7 https://doi.org/10.1007/BF02325715 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_70 GBV_ILN_2004 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_4046 GBV_ILN_4307 GBV_ILN_4319 GBV_ILN_4700 AR 31 1991 1 03 1-7
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author	Lingaiah, K.
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topic_title	690 VZ Strength and stiffness of sandwich beams in bending Failure Load Sandwich Structure Shear Stiffness Sandwich Beam Flexural Stiffness
topic	ddc 690 misc Failure Load misc Sandwich Structure misc Shear Stiffness misc Sandwich Beam misc Flexural Stiffness
topic_unstemmed	ddc 690 misc Failure Load misc Sandwich Structure misc Shear Stiffness misc Sandwich Beam misc Flexural Stiffness
topic_browse	ddc 690 misc Failure Load misc Sandwich Structure misc Shear Stiffness misc Sandwich Beam misc Flexural Stiffness
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title	Strength and stiffness of sandwich beams in bending
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title_full	Strength and stiffness of sandwich beams in bending
author_sort	Lingaiah, K.
journal	Experimental mechanics
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author_browse	Lingaiah, K. Suryanarayana, B. G.
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author-letter	Lingaiah, K.
doi_str_mv	10.1007/BF02325715
dewey-full	690
title_sort	strength and stiffness of sandwich beams in bending
title_auth	Strength and stiffness of sandwich beams in bending
abstract	Abstract This investigation is concerned with the experimental versus analytical correlation of the mechanical properties of sandwich-beam specimens. Such sandwich structures are commonly employed in the aircraft industry. Four-point and three-point load tests were conducted on a large number of sandwich-beam specimens, fabricated by using fiber-glass reinforced plastics (both unidirectional and woven-glass cloth) and DTD 685 aluminum alloy for the facings with aluminum honeycomb core and polyurethane foam cores and the indigenously available Araldite as the bonding medium between the core and the facings. The flexural stiffness of the composite sandwich specimens used in this investigation compared favorably with theoretical predictions. The shear stiffness was found to be about 55 percent and 45 percent of the theoretically predicted values for FRP (fiberglass-reinforced-plastic) cloth and FRP unidirectional laminates with aluminum honeycomb core sandwich, respectively. The failure load as determined by experiments was less than the theoretically predicted safe load. There was a loss of strength as well as a steep decrease in the failure load in the case of low density foam core. It was concluded that FRP facing plates with aluminum honeycomb core sandwich structure may be preferred to similar aluminum-alloy facing sandwich construction if high flexural stiffness and shear stiffness properties are required at less cost and weight. Indigenously available Araldite was quite satisfactory for bonding the core to the facings. This investigation has confirmed the importance of experiments in the field of sandwich structures which can effectively replace other conventional uneconomical structural or machine members which are currently in use. © Society for Experimental Mechanics, Inc. 1991
abstractGer	Abstract This investigation is concerned with the experimental versus analytical correlation of the mechanical properties of sandwich-beam specimens. Such sandwich structures are commonly employed in the aircraft industry. Four-point and three-point load tests were conducted on a large number of sandwich-beam specimens, fabricated by using fiber-glass reinforced plastics (both unidirectional and woven-glass cloth) and DTD 685 aluminum alloy for the facings with aluminum honeycomb core and polyurethane foam cores and the indigenously available Araldite as the bonding medium between the core and the facings. The flexural stiffness of the composite sandwich specimens used in this investigation compared favorably with theoretical predictions. The shear stiffness was found to be about 55 percent and 45 percent of the theoretically predicted values for FRP (fiberglass-reinforced-plastic) cloth and FRP unidirectional laminates with aluminum honeycomb core sandwich, respectively. The failure load as determined by experiments was less than the theoretically predicted safe load. There was a loss of strength as well as a steep decrease in the failure load in the case of low density foam core. It was concluded that FRP facing plates with aluminum honeycomb core sandwich structure may be preferred to similar aluminum-alloy facing sandwich construction if high flexural stiffness and shear stiffness properties are required at less cost and weight. Indigenously available Araldite was quite satisfactory for bonding the core to the facings. This investigation has confirmed the importance of experiments in the field of sandwich structures which can effectively replace other conventional uneconomical structural or machine members which are currently in use. © Society for Experimental Mechanics, Inc. 1991
abstract_unstemmed	Abstract This investigation is concerned with the experimental versus analytical correlation of the mechanical properties of sandwich-beam specimens. Such sandwich structures are commonly employed in the aircraft industry. Four-point and three-point load tests were conducted on a large number of sandwich-beam specimens, fabricated by using fiber-glass reinforced plastics (both unidirectional and woven-glass cloth) and DTD 685 aluminum alloy for the facings with aluminum honeycomb core and polyurethane foam cores and the indigenously available Araldite as the bonding medium between the core and the facings. The flexural stiffness of the composite sandwich specimens used in this investigation compared favorably with theoretical predictions. The shear stiffness was found to be about 55 percent and 45 percent of the theoretically predicted values for FRP (fiberglass-reinforced-plastic) cloth and FRP unidirectional laminates with aluminum honeycomb core sandwich, respectively. The failure load as determined by experiments was less than the theoretically predicted safe load. There was a loss of strength as well as a steep decrease in the failure load in the case of low density foam core. It was concluded that FRP facing plates with aluminum honeycomb core sandwich structure may be preferred to similar aluminum-alloy facing sandwich construction if high flexural stiffness and shear stiffness properties are required at less cost and weight. Indigenously available Araldite was quite satisfactory for bonding the core to the facings. This investigation has confirmed the importance of experiments in the field of sandwich structures which can effectively replace other conventional uneconomical structural or machine members which are currently in use. © Society for Experimental Mechanics, Inc. 1991
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title_short	Strength and stiffness of sandwich beams in bending
url	https://doi.org/10.1007/BF02325715
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