Material and structural response of polymer-matrix fibre-reinforced composites
Material and structural response of polymer-matrix fibre-reinforced composites
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DOI：
10.1177/0021998312454478
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发表时间：
2012-09-01
影响因子：
2.9
通讯作者：
Camanho, P. P.
中科院分区：
文献类型：
--
作者：
Pinho, S. T.;Darvizeh, R.;Camanho, P. P.
本文提出了一种预测复合材料层合板破坏的压力相关三维本构关系。将实验测得的剪切、横向和贯穿厚度方向的非线性本构响应直接计入模型中。此外，割线刚度取决于静水压力状态和一般应变状态。失效准则区分了基质失效、纤维扭结失效和纤维拉伸失效。原位强度用于基质破坏。失效扩展考虑了与每种失效模式相关的断裂能，对于基质失效，还考虑了层间裂纹的积累。详细讨论了现有的实验数据与表征本构响应直至最终失效所需的物理性质之间的不匹配。该模型被用来盲目预测由第二次世界范围破坏演习的组织者提供的所有12个测试案例的三轴破坏包络和应力-应变曲线。
This paper presents a pressure-dependent three-dimensional constitutive law to predict failure for laminated composites. The nonlinear constitutive response in shear and in the transverse and through-the-thickness directions, which is measured experimentally, is incorporated directly into the model. In addition, secant stiffnesses are dependent on the state of hydrostatic pressure and on the general state of strain. The failure criteria distinguish between matrix failure, fibre kinking and fibre tensile failure. In-situ strengths are used for matrix failure. Propagation of failure takes into consideration the fracture energy associated with each failure mode and, for matrix failure, the accumulation of cracks in the plies. A detailed discussion is undertaken of the mismatch between the available experimental data and the physical properties required to characterise the constitutive response up to final failure. The model is employed to make blind predictions of the triaxial failure envelopes and stress-strain curves of all 12 test cases provided by the organisers of the second World-Wide Failure Exercise.