Experimental verification of a crystal plasticity-based simulation framework for predicting microstructure and geometric shape changes: Application to bending and Taylor impact testing of Zr
Experimental verification of a crystal plasticity-based simulation framework for predicting microstructure and geometric shape changes: Application to bending and Taylor impact testing of Zr
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用于预测微观结构和几何形状变化的基于晶体塑性的模拟框架的实验验证：在 Zr 的弯曲和泰勒冲击测试中的应用
DOI：
10.1016/j.ijimpeng.2020.103655
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发表时间：
2020
影响因子：
5.1
通讯作者：
Knezevic, Marko
中科院分区：
文献类型：
--
作者：
Vasilev, Evgenii;Zecevic, Miroslav;McCabe, Rodney J.;Knezevic, Marko
本文对最近建立的金属材料从准静态到冲击变形条件下的多尺度塑性变形模拟框架进行了实验验证。该框架是嵌入隐式有限元方法(FE-VPSC)的粘塑性自洽(VPSC)多晶模型，在每个材料点处提供对微观结构敏感的本构响应。有限元模型中的每个物质点都是具有在单晶尺度上工作的晶体变形机制的多晶集合体，它们的演化活动基于位错密度硬化规律和织构。在泰勒冲击试验中，分别以100m/S、170m/S和243m/S的速度进行了四点弯曲、100m/S、170m/S和243m/S的准静态冲击试验。对于每个样品，测量由于板中样品相对于加载方向的不同取向而引起的尺寸变化的变化。此外，还利用电子背散射衍射(EBSD)进行了织构和孪晶的表征。利用FE-VPSC框架成功地模拟了变形过程和微观组织的演化过程。在此过程中，模型参数在广泛的应变率和温度范围内进行了优化和验证。并将模拟结果与实验测量结果进行了比较。该模型预测了由难于变形的晶体方向、织构和通过几何形状的孪生的梯度的发展、拉伸-压缩不对称性以及冲击下的塑性程度所引起的各向异性材料流动。
This paper is concerned with experimental verification of a recently developed multi-scale simulation framework for plastic deformation of metallic materials from quasi-static to impact deformation conditions. The framework is a visco-plastic self-consistent (VPSC) polycrystalline model embedded in an implicit finite element method (FE-VPSC) to provide a microstructure-sensitive constitutive response at each material point. Each material point of the FEM model is a polycrystalline aggregate with crystallographic deformation mechanisms operating at the single crystal scale with their evolving activity based on a dislocation density-based hardening law and texture. Four beams and three cylinders machined in different orientations from a textured plate of high-purity zirconium are tested quasi-statically in 4-point bending and at speeds of 100 m/s, 170 m/s and 243 m/s during Taylor impact tests, respectively. The variation in dimensional changes resulting from different sample orientations in the plate with respect to loading directions is measured for each sample. Moreover, texture and twinning characterization is performed using electron backscattered diffraction (EBSD). The deformation processes and underlying evolution of microstructure are successfully simulated using the FE-VPSC framework. In doing so, the model parameters are optimized and validated across a broad range of strain rates and temperatures. Simulation results in terms of geometrical changes and microstructural evolution are compared with the experimental measurements. The model predicts anisotropic material flow resulting from the hard-to-deform crystallographic directions, the development of gradients in texture and twinning through the geometries, tension–compression asymmetry, as well as the extent of plasticity under impact.
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影响因子：
3.4
作者：
Milovan Zecevic;T. Roemer;M. Knezevic;Y. Korkolis;B. Kinsey
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B. Kinsey
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影响因子：
9.8
作者：
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通讯作者：
R. Mishra
DOI：
--
发表时间：
1991
期刊：
Metallurgical and Materials Transactions A
影响因子：
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作者：
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DOI：
--
发表时间：
1948
期刊：
Proceedings of the Royal Society of London. Series A, Mathematical and physical sciences
影响因子：
--
作者：
W. Carrington;M. L. V. Gayler
通讯作者：
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DOI：
--
发表时间：
2010
期刊：
影响因子：
--
作者：
H. Alharbi;M. Knezevic;S. Kalidindi
通讯作者：
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