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A study of damage development in a weft knitted fabric reinforced composite. Part 1: Experiments using model sandwich laminates
Coupons consisting of single layers of Milano weft knitted glass fabric reinforced epoxy resin have been tested with the knitted fabric oriented at various angles to the loading direction, alone and sandwiched between outer layers of unidirectional glass/epoxy reinforcement. The sandwich coupons ena...
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Published in: | Composites. Part A, Applied science and manufacturing Applied science and manufacturing, 2007-07, Vol.38 (7), p.1773-1793 |
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container_issue | 7 |
container_start_page | 1773 |
container_title | Composites. Part A, Applied science and manufacturing |
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creator | Rios, C.R. Ogin, S.L. Lekakou, C. Leong, K.H. |
description | Coupons consisting of single layers of Milano weft knitted glass fabric reinforced epoxy resin have been tested with the knitted fabric oriented at various angles to the loading direction, alone and sandwiched between outer layers of unidirectional glass/epoxy reinforcement. The sandwich coupons enable the initiation of damage to be observed directly. Tensile tests have shown that the first damage occurs as microdebonding between the loop cross-over points in the knitted fabric structure. Matrix cracking damage develops from these initiation sites and the pattern of cracking is intimately related to the fabric architecture and the fabric orientation with respect to the loading direction. Cyclic tests of sandwich specimens, and a representation of the results in terms of cumulative strain, indicate that some of the acoustic emission activity during loading and unloading of the specimens is likely to be associated with the debonding and pulling-out of knitted fabric tows across the fracture surfaces of the matrix cracks. |
doi_str_mv | 10.1016/j.compositesa.2006.02.027 |
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Cyclic tests of sandwich specimens, and a representation of the results in terms of cumulative strain, indicate that some of the acoustic emission activity during loading and unloading of the specimens is likely to be associated with the debonding and pulling-out of knitted fabric tows across the fracture surfaces of the matrix cracks.</description><identifier>ISSN: 1359-835X</identifier><identifier>EISSN: 1878-5840</identifier><identifier>DOI: 10.1016/j.compositesa.2006.02.027</identifier><language>eng</language><publisher>Oxford: Elsevier Ltd</publisher><subject>Applied sciences ; D. Acoustic emission ; D. Electron microscopy ; D. Fractography ; D. Mechanical testing ; Exact sciences and technology ; Forms of application and semi-finished materials ; Laminates ; Polymer industry, paints, wood ; Technology of polymers</subject><ispartof>Composites. 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Cyclic tests of sandwich specimens, and a representation of the results in terms of cumulative strain, indicate that some of the acoustic emission activity during loading and unloading of the specimens is likely to be associated with the debonding and pulling-out of knitted fabric tows across the fracture surfaces of the matrix cracks.</description><subject>Applied sciences</subject><subject>D. Acoustic emission</subject><subject>D. Electron microscopy</subject><subject>D. Fractography</subject><subject>D. Mechanical testing</subject><subject>Exact sciences and technology</subject><subject>Forms of application and semi-finished materials</subject><subject>Laminates</subject><subject>Polymer industry, paints, wood</subject><subject>Technology of polymers</subject><issn>1359-835X</issn><issn>1878-5840</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><recordid>eNqNkE9r3DAQxUVJocm230E9tDc7-rOW5d7CkjSBQHJooTchS6NUW1tyJW3SnPrVq2VDk2NgQIN48-bND6GPlLSUUHG6bU2cl5h9gaxbRohoCavVv0HHVPay6eSaHNWed0MjeffjHTrJeUsI4Xygx-jvGc5lZx9xdNjqWd8BtnAPU1xmCAX7gDV-AFfwr-BLAYudHpM3OIEPLiZTf_4HaPGtTgXTL_j8zwLJ7x0y3mUf7vAcLUw462AfvPmJJz37oGvm9-it01OGD0_vCn2_OP-2uWyub75ebc6uG8MlK00vHB-M7JgxAogcRxitkGsqhXTGUTbw3owdHYXoGIPeDXJkhK5d19u1JdbyFfp88F1S_L2DXNTss4Fp0gHiLiteifRCkCocDkKTYs4JnFrqJTo9KkrUHrnaqhfI1R65IqxWX2c_PS3R2ejJJR2Mz88GUkpCatYV2hx0UC--95BUNh5ChekTmKJs9K_Y9g_6rZ_L</recordid><startdate>200707</startdate><enddate>200707</enddate><creator>Rios, C.R.</creator><creator>Ogin, S.L.</creator><creator>Lekakou, C.</creator><creator>Leong, K.H.</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>JG9</scope></search><sort><creationdate>200707</creationdate><title>A study of damage development in a weft knitted fabric reinforced composite. 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The sandwich coupons enable the initiation of damage to be observed directly. Tensile tests have shown that the first damage occurs as microdebonding between the loop cross-over points in the knitted fabric structure. Matrix cracking damage develops from these initiation sites and the pattern of cracking is intimately related to the fabric architecture and the fabric orientation with respect to the loading direction. Cyclic tests of sandwich specimens, and a representation of the results in terms of cumulative strain, indicate that some of the acoustic emission activity during loading and unloading of the specimens is likely to be associated with the debonding and pulling-out of knitted fabric tows across the fracture surfaces of the matrix cracks.</abstract><cop>Oxford</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.compositesa.2006.02.027</doi><tpages>21</tpages></addata></record> |
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source | ScienceDirect Freedom Collection |
subjects | Applied sciences D. Acoustic emission D. Electron microscopy D. Fractography D. Mechanical testing Exact sciences and technology Forms of application and semi-finished materials Laminates Polymer industry, paints, wood Technology of polymers |
title | A study of damage development in a weft knitted fabric reinforced composite. Part 1: Experiments using model sandwich laminates |
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