Multiple Transverse Cracking and Stiffness Reduction in Cross-Ply Laminates
作者： WS Johnson , JE Masters , PA Lagace , J Varna , L Berglund
DOI: 10.1520/CTR10213J
关键词: Composite material 、 Strain energy release rate 、 Stress field 、 Materials science 、 Composite laminates 、 Linear elasticity 、 Cracking 、 Epoxy 、 Fracture mechanics 、 Stiffness
摘要: The stiffness reduction as a result of multiple transverse cracking in cross-ply laminates and the crack density dependence on applied tensile stress are analyzed by linear elastic fracture mechanics. field distribution is obtained principle minimum complementary energy. Two models suggested which describe non-uniform thickness direction 0° layer. They contain variational approach presented Hashin particular case. Elastic ply properties Mode I critical strain energy release rate GIc for experimental data needed. Model predictions compared with glass fiber/epoxy, AS4/3502, AS/3501-06 carbon fiber/epoxy laminates. from both constraint effect saturation phenomenon.
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