An enhanced concept of rheological models to represent nonlinear thermoviscoplasticity and its energy storage behavior
An enhanced concept of rheological models to represent nonlinear thermoviscoplasticity and its energy storage behavior
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DOI：
10.1007/s00161-012-0268-3
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发表时间：
2013-11-01
影响因子：
2.6
通讯作者：
Matzenmiller, A.
中科院分区：
文献类型：
--
作者：
Brocker, C.;Matzenmiller, A.
提出了用于热粘塑性材料建模的增强流变网络。通过引入新的基本元素，可以描述非线性各向同性和运动硬化，以及塑性变形过程中能量存储和耗散的改进描述。在满足热机械一致性的情况下，通过简单的代数计算，从应力平衡和流变网络的运动学中直接推导出屈服函数和流动规则。提出了新的方法来解释过程相关的能量存储以及理想可塑性的情况。通过张力测试数据的模拟来研究和验证由此产生的能量存储行为。
An enhanced rheological network is presented for the material modeling of thermoviscoplasticity. By introducing new basic elements, nonlinear isotropic and kinematic hardening may be depicted as well as an improved description of energy storage and dissipation during plastic deformations. Satisfying the thermomechanical consistency, the yield function and the flow rule are directly deduced from the stress equilibrium and the kinematics of the rheological network by means of simple algebraic calculations. Novel approaches are proposed to account for a process-dependent energy storage also for the case of ideal plasticity. The resulting energy storage behavior is investigated and validated by means of the simulation of tension test data.