Effective Elastoplastic Algorithms for Ductile Matrix Composites
Effective Elastoplastic Algorithms for Ductile Matrix Composites
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DOI：
10.1061/(asce)0733-9399(1997)123:3(260
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发表时间：
1997-03
期刊：
影响因子：
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通讯作者：
J. Ju;K. Tseng
中科院分区：
文献类型：
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作者：
J. Ju;K. Tseng
提出了一种三维计算算法来实现作者推导的微机械框架。该公式能够有效地预测含有随机分散相互作用弹性球的两相颗粒增强韧性基体复合材料的弹塑性行为。提出了一种应变驱动的算法，通过使用两步算子分裂方法，适用于任何任意的加载和卸载历史，以确定一个给定的应变的应力。此外，连续和一致的切线模量推导出封闭的形式，以方便组装的整体切线刚度。对颗粒增强韧性基复合材料的有效率相关弹粘塑性行为进行了预测。最后，有限元实现和数值例子。
A three-dimensional computational algorithm is proposed to implement the micromechanical framework derived by the writers. The proposed formulation is capable of predicting effective elastoplastic behavior of two-phase particle reinforced ductile matrix composites (PRDMCs) containing may randomly dispersed interacting elastic spheres. A strain-driven algorithm is presented to determine the stress for a given strain by using the two-step operator splitting methodology applicable to any arbitrary loading and unloading histories. Furthermore, continuum and consistent tangent moduli are derived in closed form to facilitate the assembly of the global tangent stiffness. Extension is also made to predict effective rate-dependent elasto-viscoplastic behavior of particle-reinforced ductile matrix composites. Finally, finite-element implementation and numerical examples are presented.