Modelling of the stress/strain behaviour of a carbon/carbon composite with a 2.5 dimensional fibre architecture under tensile and shear loads at room temperature
Modelling of the stress/strain behaviour of a carbon/carbon composite with a 2.5 dimensional fibre architecture under tensile and shear loads at room temperature
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DOI：
10.1016/s0266-3538(97)00241-8
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发表时间：
1999
影响因子：
9.1
通讯作者：
O. Siron;J. Pailhès;J. Lamon
中科院分区：
文献类型：
--
作者：
O. Siron;J. Pailhès;J. Lamon
本文提出了针织碳/碳(C/C)复合材料在平行于铺层的拉伸和剪切载荷作用下的非线性应力/应变行为和最终破坏的宏观模型。该模型基于描述损伤演化的连续介质损伤力学概念和描述由基质损伤引起的非弹性应变的塑性方法，并遵循Ladevèze提出的复合材料的一般方法。建模是由加载下的测试试件的广泛显微镜检查获得的关于基质损伤模式的实验数据指导的。该模型包括三个标量损伤参数，包括两个拉伸参数和一个由拉伸参数组合而成的剪切参数。损伤参数的识别需要一次离轴(在铺层平面45°处)和两次轴上(平行于两个方向)的单轴拉伸试验。用各种离轴试验测得的拉伸应力/应变曲线对模型进行了验证。采用损伤累积准则对最终破坏进行预测。
The paper presents a macroscopic model of the non-linear stress/strain behaviour and the ultimate failure of a needled, woven carbon/carbon (C/C) composite, under tensile and shear loads parallel to the plies. The model is based upon continuum damage mechanics concepts for the description of damage evolution, and the approach to plasticity for the description of inelastic strains induced by matrix damage, according to the general approach developed by Ladevèze for composites. Modelling was guided by the experimental data on the matrix damage modes obtained from extensive microscopy examination of the test specimens under load. The model involves three scalar damage parameters including two tensile parameters, and one shear parameter resulting from a combination of the tensile ones. Identification of the damage parameters requires one off-axis (at 45° in the plane of the plies), and two on-axis (parallel to tow directions) uniaxial tensile tests. The model was validated with tensile stress/strain curves measured from various off-axis tests. The ultimate failure was predicted by the use of damage accumulation criteria.