| Author Name | Affiliation | | PAN Shi-dong | School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China
Center for Composite Materials and Structures,Harbin Institute of Technology,Harbin 150080,China | | FENG Ji-cai | School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China | | WU Lin-zhi | Center for Composite Materials and Structures,Harbin Institute of Technology,Harbin 150080,China |
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| Abstract: |
| The flatwise tension(FWT) and single leg bending(SLB) tests were used to investigate the fracture behavior of honeycomb sandwich specimens.In the FWT test,only the interlaminar delamination was observed.The test results show that the interfacial peel strength is higher than the interlaminar peel strength.In terms of SLB experiment,a new fracture mode was found,namely IKP(initiation of interlaminar delamination,kinking into facesheet and propagation of interlaminar delamination).The virtual crack closure technique was applied to separate the values of Mode I and Mode II components of the strain energy release rate in SLB experiment.The finite element analysis result shows that the Mode I strain energy release rate is higher than the Mode II strain energy release rate.To simulate the failure of SLB test of honeycomb sandwich specimens,a new computational model based on the Tsai-Hill failure criterion and the cohesive zone model is proposed.In comparison with experimental results,it can be concluded that the computational model can validly simulate the IKP of a honeycomb sandwich structures with reasonable accuracy. |
| Key words: SLB interlaminar delamination kinking Tsai-Hill failure criterion cohesive zone model |
| DOI：10.11916/j.issn.1005-9113.2009.04.001 |
| Clc Number:TB303 |
| Fund: |
