Damage Analysis of Composites by Coupling Multiple Failure Mode
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摘要: 复合材料的损伤失效形式是多样的, 其损伤失效形式包括层合板损伤、胶体裂纹扩展和界面脱黏。为了探讨层合板损伤、胶体裂纹扩展、界面脱黏3种损伤失效之间的内在联系, 先利用ABAQUS/Explicit软件建立混合型弯曲(MMB)断裂有限元模型, 通过数值仿真结果与实验结果的比较, 从而证明MMB模型的准确性。然后结合Hashin失效准则、扩展有限元法(XFEM)和内聚力模型(CZM)来研究3种失效模式的内在联系。结果表明: 层合板损伤不仅可以影响界面脱黏失效发生时间, 同时也能影响胶体中裂纹扩展路径, 为复合材料损伤问题数值分析提供了一定的参考。Abstract: Composite damage failure form is various, the damage failure forms including laminated plate damage, colloid crack extension and interface debonding. To investigate damage of laminates, colloid crack propagation, interface delamination inherent relations among the three kinds of damage failure, the hybrid bending (MMB) fracture finite element model is firstly established by using ABAQUS/Explicit software, by comparing the simulation and experimental results, which proves the accuracy of MMB model. Then, the internal relationship among the three failure modes was studied by combining the Hashin failure criterion, extended finite Element method (XFEM) and cohesive force model (CZM). The results show that the damage of laminates can not only affect the time of interface viscous separation failure, but also affect the crack propagation path in colloid, which provides a certain reference for numerical analysis of the damage problem of composites.
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Key words:
- damage of laminates /
- colloid crack propagation /
- interface delamination /
- Hashin failure criterion /
- XFEM /
- CZM
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表 1 AS4/PEEK材料属性
Table 1. AS4/PEEK material properties
参数 数值 层内 E11 122.7 GPa E22=E33 10.1 GPa G12=G13 5.5 GPa G23 3.7 GPa v12=v13 0.25 v23 0.45 层间 K 106 N/mm3 σn0 80 MPa σs0 100 MPa GⅠC 0.969 mJ/mm2 GⅡC 1.719 mJ/mm2 ηBK 2.73 表 2 T300/1034-C材料属性
Table 2. Material properties of T300/1034-C
参数 数值 参数 数值 E11 146.757 GPa G23 3.790 GPa E22=E33 11.369 GPa v12=v13 0.3 G12=G13 6.180 GPa v23 0.5 XC 1 378 MPa XT 1 729 MPa YC 268 MPa YT 67 MPa ZT 67 MPa ZC 268 MPa Sxy 134 MPa Sxz 100 MPa Syz 100 MPa 表 3 AV138材料属性
Table 3. Material properties
参数 数值 参数 数值 E 4 890 MPa GIC 0.2 mJ/mm2 σn0 39.45 MPa GⅡC=GⅢC 0.38 mJ/mm2 σs0=σt0 30.2 MPa α 1 v 0.35 K 106 N/mm3 -
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