Finite element simulations of poly-crystalline shape memory alloys based on a micromechanical model
Finite element simulations of poly-crystalline shape memory alloys based on a micromechanical model
复制标题
基于微观力学模型的多晶形状记忆合金有限元模拟
DOI：
10.1007/s00466-010-0555-4
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发表时间：
2011
影响因子：
4.1
通讯作者：
K. Hackl
中科院分区：
文献类型：
--
作者：
P. Junker;K. Hackl
我们提出了一个有限元实现的多晶形状记忆合金的微机械激励模型，基于能量最小化原则。该实现允许模拟各向异性材料行为以及整个样品的伪弹性和伪塑性材料响应。计算了整个试样上的演变相分布。有限元模型预测的材料性能为一个相对较小的晶粒数。对于试样中的不同兴趣点，可以在后处理步骤中使用显著更高数量的晶粒一致地评估模型，这允许预测不同负载下马氏体的再取向。讨论了预织构对材料性能的影响，由于一些先前的处理，如轧制。
We present a finite element implementation of a micromechanically motivated model for poly-crystalline shape memory alloys, based on energy minimization principles. The implementation allows simulation of anisotropic material behavior as well as the pseudo-elastic and pseudo-plastic material response of whole samples. The evolving phase distribution over the entire specimen is calculated. The finite element model predicts the material properties for a relatively small number of grains. For different points of interest in the specimen the model can be consistently evaluated with a significantly higher number of grains in a post-processing step, which allows to predict the re-orientation of martensite at different loads. The influence of pre-texture on the material’s properties, due to some previous treatment like rolling, is discussed.