In situ surface displacement analysis of fracture and fatigue behaviour under bending conditions of sandwich beam consisting of aluminium foam core and metallic face sheets

The present paper deals with the study of the mechanical behaviour of sandwich beams under monolithic and cyclic bending. The strains and displacements were monitored by in situ surface displacement analysis (SDA) software. The sandwich beams consisted of an aluminium foam core covered by metallic f...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Materials science and technology 2006-01, Vol.22 (1), p.51-60
Hauptverfasser: Sha, J. B., Yip, T. H., Wong, S. K. M.
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
container_end_page 60
container_issue 1
container_start_page 51
container_title Materials science and technology
container_volume 22
creator Sha, J. B.
Yip, T. H.
Wong, S. K. M.
description The present paper deals with the study of the mechanical behaviour of sandwich beams under monolithic and cyclic bending. The strains and displacements were monitored by in situ surface displacement analysis (SDA) software. The sandwich beams consisted of an aluminium foam core covered by metallic face sheets. For a certain sandwich geometrical configuration, the operative failure mode is the same under both monolithic and cyclic bending conditions. Indentation (ID) and core shear (CS) are the basic failure modes, which depend entirely on the geometry of the sandwich beam. The SDA results show that ID is localised compression of the beam adjacent to the inner rollers, where the displacement and strain are at a maximum. As for the CS failure mode, failure happens within the core between the inner and outer rollers, where shear crack initiation and growth correspond to the maximum shear strain, accompanied by discontinuous displacements in both vertical and horizontal directions. Owing to constraint of the weak foam core imposed by the strong metallic face sheets in a sandwich beam, the core can bear stresses higher than the yield strength of monolithic foam by a factor of 1·6-3·2 for both CS and ID failure modes. This factor depends mainly on the geometry of the sandwich beam. Similarly, the fatigue limit of the core in the sandwich beam is also higher than the fatigue strength of monolithic foam. The stronger is the constraint, the higher is the fatigue limit of the core. The fatigue limit of a sandwich beam also relates to the failure mode. At fatigue ratio R=0, the fatigue limit of sandwich beams failing by the ID mode is higher than that of beams which fail by the CS mode.
doi_str_mv 10.1179/174328406X79270
format Article
fullrecord <record><control><sourceid>proquest_infor</sourceid><recordid>TN_cdi_proquest_miscellaneous_34903475</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sage_id>10.1179_174328406X79270</sage_id><sourcerecordid>34903475</sourcerecordid><originalsourceid>FETCH-LOGICAL-c449t-ce4953f9bff94512caae69f95745d37d66571f2ed143af67fc568910f1f04f9e3</originalsourceid><addsrcrecordid>eNqFkj1rHDEQhpcQQy6O67QiRapsLK2-VumCcRKDIU0M7hZZO7qT0UoXfcTcf8qPjO7OEDAYVyPN-7wzYjRd957gz4RIdU4ko8PIsLiVapD4VbfaZ_qWkq-7FR6E7PFIxZvubc73GGOhlFp1f68Cyq5UlGuy2gCaXd76dlggFKSD9rvsMooW2aRNqQlackZWF7eugO5go_-4WBOqYYbU7mF2YY1MbLG4GA7W3CwPzmyarJe91kqWPdY07evigqsLsvEgPnZYoGjvnUGHV-UNQMnvuhOrfYazx3ja3Xy7_HXxo7_--f3q4ut1bxhTpTfAFKdW3VmrGCeD0RqEsopLxmcqZyG4JHaAmTCqrZDWcDEqgi2xmFkF9LT7eKy7TfF3hVymxWUD3usAseaJMoUpk_xFcFCD4lyNL4PjSClXtIEfnoD3bbrtGxqDCRF8FKxB50fIpJhzAjttk1t02k0ET_tlmJ4sQ3N8OjqyXsP_ks_jX464CzamRT_E5Oep6J2Pqe1BMK4N4TnzP4zrygE</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>201165864</pqid></control><display><type>article</type><title>In situ surface displacement analysis of fracture and fatigue behaviour under bending conditions of sandwich beam consisting of aluminium foam core and metallic face sheets</title><source>Access via SAGE</source><creator>Sha, J. B. ; Yip, T. H. ; Wong, S. K. M.</creator><creatorcontrib>Sha, J. B. ; Yip, T. H. ; Wong, S. K. M.</creatorcontrib><description>The present paper deals with the study of the mechanical behaviour of sandwich beams under monolithic and cyclic bending. The strains and displacements were monitored by in situ surface displacement analysis (SDA) software. The sandwich beams consisted of an aluminium foam core covered by metallic face sheets. For a certain sandwich geometrical configuration, the operative failure mode is the same under both monolithic and cyclic bending conditions. Indentation (ID) and core shear (CS) are the basic failure modes, which depend entirely on the geometry of the sandwich beam. The SDA results show that ID is localised compression of the beam adjacent to the inner rollers, where the displacement and strain are at a maximum. As for the CS failure mode, failure happens within the core between the inner and outer rollers, where shear crack initiation and growth correspond to the maximum shear strain, accompanied by discontinuous displacements in both vertical and horizontal directions. Owing to constraint of the weak foam core imposed by the strong metallic face sheets in a sandwich beam, the core can bear stresses higher than the yield strength of monolithic foam by a factor of 1·6-3·2 for both CS and ID failure modes. This factor depends mainly on the geometry of the sandwich beam. Similarly, the fatigue limit of the core in the sandwich beam is also higher than the fatigue strength of monolithic foam. The stronger is the constraint, the higher is the fatigue limit of the core. The fatigue limit of a sandwich beam also relates to the failure mode. At fatigue ratio R=0, the fatigue limit of sandwich beams failing by the ID mode is higher than that of beams which fail by the CS mode.</description><identifier>ISSN: 0267-0836</identifier><identifier>EISSN: 1743-2847</identifier><identifier>DOI: 10.1179/174328406X79270</identifier><identifier>CODEN: MSCTEP</identifier><language>eng</language><publisher>London, England: Taylor &amp; Francis</publisher><subject>ALUMINIUM FOAM ; Bending ; CORE SHEAR ; Crack initiation ; FATIGUE ; Fractures ; INDENTATION ; Materials fatigue ; METALLIC FACE SHEET ; SANDWICH BEAMS ; SURFACE DISPLACEMENT ANALYSIS ; Yield stress</subject><ispartof>Materials science and technology, 2006-01, Vol.22 (1), p.51-60</ispartof><rights>2006 Maney Publishing 2006</rights><rights>2006 Maney Publishing</rights><rights>Copyright Institute of Materials Jan 2006</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c449t-ce4953f9bff94512caae69f95745d37d66571f2ed143af67fc568910f1f04f9e3</citedby><cites>FETCH-LOGICAL-c449t-ce4953f9bff94512caae69f95745d37d66571f2ed143af67fc568910f1f04f9e3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://journals.sagepub.com/doi/pdf/10.1179/174328406X79270$$EPDF$$P50$$Gsage$$H</linktopdf><linktohtml>$$Uhttps://journals.sagepub.com/doi/10.1179/174328406X79270$$EHTML$$P50$$Gsage$$H</linktohtml><link.rule.ids>314,780,784,21819,27924,27925,43621,43622</link.rule.ids></links><search><creatorcontrib>Sha, J. B.</creatorcontrib><creatorcontrib>Yip, T. H.</creatorcontrib><creatorcontrib>Wong, S. K. M.</creatorcontrib><title>In situ surface displacement analysis of fracture and fatigue behaviour under bending conditions of sandwich beam consisting of aluminium foam core and metallic face sheets</title><title>Materials science and technology</title><description>The present paper deals with the study of the mechanical behaviour of sandwich beams under monolithic and cyclic bending. The strains and displacements were monitored by in situ surface displacement analysis (SDA) software. The sandwich beams consisted of an aluminium foam core covered by metallic face sheets. For a certain sandwich geometrical configuration, the operative failure mode is the same under both monolithic and cyclic bending conditions. Indentation (ID) and core shear (CS) are the basic failure modes, which depend entirely on the geometry of the sandwich beam. The SDA results show that ID is localised compression of the beam adjacent to the inner rollers, where the displacement and strain are at a maximum. As for the CS failure mode, failure happens within the core between the inner and outer rollers, where shear crack initiation and growth correspond to the maximum shear strain, accompanied by discontinuous displacements in both vertical and horizontal directions. Owing to constraint of the weak foam core imposed by the strong metallic face sheets in a sandwich beam, the core can bear stresses higher than the yield strength of monolithic foam by a factor of 1·6-3·2 for both CS and ID failure modes. This factor depends mainly on the geometry of the sandwich beam. Similarly, the fatigue limit of the core in the sandwich beam is also higher than the fatigue strength of monolithic foam. The stronger is the constraint, the higher is the fatigue limit of the core. The fatigue limit of a sandwich beam also relates to the failure mode. At fatigue ratio R=0, the fatigue limit of sandwich beams failing by the ID mode is higher than that of beams which fail by the CS mode.</description><subject>ALUMINIUM FOAM</subject><subject>Bending</subject><subject>CORE SHEAR</subject><subject>Crack initiation</subject><subject>FATIGUE</subject><subject>Fractures</subject><subject>INDENTATION</subject><subject>Materials fatigue</subject><subject>METALLIC FACE SHEET</subject><subject>SANDWICH BEAMS</subject><subject>SURFACE DISPLACEMENT ANALYSIS</subject><subject>Yield stress</subject><issn>0267-0836</issn><issn>1743-2847</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNqFkj1rHDEQhpcQQy6O67QiRapsLK2-VumCcRKDIU0M7hZZO7qT0UoXfcTcf8qPjO7OEDAYVyPN-7wzYjRd957gz4RIdU4ko8PIsLiVapD4VbfaZ_qWkq-7FR6E7PFIxZvubc73GGOhlFp1f68Cyq5UlGuy2gCaXd76dlggFKSD9rvsMooW2aRNqQlackZWF7eugO5go_-4WBOqYYbU7mF2YY1MbLG4GA7W3CwPzmyarJe91kqWPdY07evigqsLsvEgPnZYoGjvnUGHV-UNQMnvuhOrfYazx3ja3Xy7_HXxo7_--f3q4ut1bxhTpTfAFKdW3VmrGCeD0RqEsopLxmcqZyG4JHaAmTCqrZDWcDEqgi2xmFkF9LT7eKy7TfF3hVymxWUD3usAseaJMoUpk_xFcFCD4lyNL4PjSClXtIEfnoD3bbrtGxqDCRF8FKxB50fIpJhzAjttk1t02k0ET_tlmJ4sQ3N8OjqyXsP_ks_jX464CzamRT_E5Oep6J2Pqe1BMK4N4TnzP4zrygE</recordid><startdate>20060101</startdate><enddate>20060101</enddate><creator>Sha, J. B.</creator><creator>Yip, T. H.</creator><creator>Wong, S. K. M.</creator><general>Taylor &amp; Francis</general><general>SAGE Publications</general><general>Taylor &amp; Francis Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7SR</scope><scope>7XB</scope><scope>88I</scope><scope>8AF</scope><scope>8BQ</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FK</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>F28</scope><scope>FR3</scope><scope>GNUQQ</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>M2P</scope><scope>PDBOC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>Q9U</scope><scope>S0X</scope><scope>7QF</scope><scope>7TB</scope><scope>KR7</scope></search><sort><creationdate>20060101</creationdate><title>In situ surface displacement analysis of fracture and fatigue behaviour under bending conditions of sandwich beam consisting of aluminium foam core and metallic face sheets</title><author>Sha, J. B. ; Yip, T. H. ; Wong, S. K. M.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c449t-ce4953f9bff94512caae69f95745d37d66571f2ed143af67fc568910f1f04f9e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2006</creationdate><topic>ALUMINIUM FOAM</topic><topic>Bending</topic><topic>CORE SHEAR</topic><topic>Crack initiation</topic><topic>FATIGUE</topic><topic>Fractures</topic><topic>INDENTATION</topic><topic>Materials fatigue</topic><topic>METALLIC FACE SHEET</topic><topic>SANDWICH BEAMS</topic><topic>SURFACE DISPLACEMENT ANALYSIS</topic><topic>Yield stress</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sha, J. B.</creatorcontrib><creatorcontrib>Yip, T. H.</creatorcontrib><creatorcontrib>Wong, S. K. M.</creatorcontrib><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Engineered Materials Abstracts</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Science Database (Alumni Edition)</collection><collection>STEM Database</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Materials Science &amp; Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>ANTE: Abstracts in New Technology &amp; Engineering</collection><collection>Engineering Research Database</collection><collection>ProQuest Central Student</collection><collection>SciTech Premium Collection</collection><collection>Materials Research Database</collection><collection>Materials Science Database</collection><collection>Science Database</collection><collection>Materials Science Collection</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>ProQuest Central Basic</collection><collection>SIRS Editorial</collection><collection>Aluminium Industry Abstracts</collection><collection>Mechanical &amp; Transportation Engineering Abstracts</collection><collection>Civil Engineering Abstracts</collection><jtitle>Materials science and technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sha, J. B.</au><au>Yip, T. H.</au><au>Wong, S. K. M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>In situ surface displacement analysis of fracture and fatigue behaviour under bending conditions of sandwich beam consisting of aluminium foam core and metallic face sheets</atitle><jtitle>Materials science and technology</jtitle><date>2006-01-01</date><risdate>2006</risdate><volume>22</volume><issue>1</issue><spage>51</spage><epage>60</epage><pages>51-60</pages><issn>0267-0836</issn><eissn>1743-2847</eissn><coden>MSCTEP</coden><abstract>The present paper deals with the study of the mechanical behaviour of sandwich beams under monolithic and cyclic bending. The strains and displacements were monitored by in situ surface displacement analysis (SDA) software. The sandwich beams consisted of an aluminium foam core covered by metallic face sheets. For a certain sandwich geometrical configuration, the operative failure mode is the same under both monolithic and cyclic bending conditions. Indentation (ID) and core shear (CS) are the basic failure modes, which depend entirely on the geometry of the sandwich beam. The SDA results show that ID is localised compression of the beam adjacent to the inner rollers, where the displacement and strain are at a maximum. As for the CS failure mode, failure happens within the core between the inner and outer rollers, where shear crack initiation and growth correspond to the maximum shear strain, accompanied by discontinuous displacements in both vertical and horizontal directions. Owing to constraint of the weak foam core imposed by the strong metallic face sheets in a sandwich beam, the core can bear stresses higher than the yield strength of monolithic foam by a factor of 1·6-3·2 for both CS and ID failure modes. This factor depends mainly on the geometry of the sandwich beam. Similarly, the fatigue limit of the core in the sandwich beam is also higher than the fatigue strength of monolithic foam. The stronger is the constraint, the higher is the fatigue limit of the core. The fatigue limit of a sandwich beam also relates to the failure mode. At fatigue ratio R=0, the fatigue limit of sandwich beams failing by the ID mode is higher than that of beams which fail by the CS mode.</abstract><cop>London, England</cop><pub>Taylor &amp; Francis</pub><doi>10.1179/174328406X79270</doi><tpages>10</tpages></addata></record>
fulltext fulltext
identifier ISSN: 0267-0836
ispartof Materials science and technology, 2006-01, Vol.22 (1), p.51-60
issn 0267-0836
1743-2847
language eng
recordid cdi_proquest_miscellaneous_34903475
source Access via SAGE
subjects ALUMINIUM FOAM
Bending
CORE SHEAR
Crack initiation
FATIGUE
Fractures
INDENTATION
Materials fatigue
METALLIC FACE SHEET
SANDWICH BEAMS
SURFACE DISPLACEMENT ANALYSIS
Yield stress
title In situ surface displacement analysis of fracture and fatigue behaviour under bending conditions of sandwich beam consisting of aluminium foam core and metallic face sheets
url https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-23T10%3A32%3A09IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_infor&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=In%20situ%20surface%20displacement%20analysis%20of%20fracture%20and%20fatigue%20behaviour%20under%20bending%20conditions%20of%20sandwich%20beam%20consisting%20of%20aluminium%20foam%20core%20and%20metallic%20face%20sheets&rft.jtitle=Materials%20science%20and%20technology&rft.au=Sha,%20J.%20B.&rft.date=2006-01-01&rft.volume=22&rft.issue=1&rft.spage=51&rft.epage=60&rft.pages=51-60&rft.issn=0267-0836&rft.eissn=1743-2847&rft.coden=MSCTEP&rft_id=info:doi/10.1179/174328406X79270&rft_dat=%3Cproquest_infor%3E34903475%3C/proquest_infor%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=201165864&rft_id=info:pmid/&rft_sage_id=10.1179_174328406X79270&rfr_iscdi=true