A method to extract slip system dependent information for crystal plasticity models.
A method to extract slip system dependent information for crystal plasticity models.
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DOI：
10.1016/j.mex.2022.101763
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发表时间：
2022
期刊：
影响因子：
1.9
通讯作者：
Knowles, David
中科院分区：
文献类型：
--
作者：
Agius, Dylan;Al Mamun, Abdullah;Truman, Christopher;Mostafavi, Mahmoud;Knowles, David
关键词：
一个工具来实现一个长度尺度依赖经典晶体塑性模拟。经典的晶体塑性模型不包括尺寸效应，因此，晶粒的尺寸不影响模拟的变形。经典晶体塑性的进步已经通过包括基于应力或应变梯度的本构模型来改善长度尺度依赖性变形的模拟。然而，该工具提供了实现长度尺度的替代方案，其中以晶界处的位错形式的滑移堆积的影响作为解释材料中的Hall-Petch效应的潜力。这是通过计算每个滑移系的相邻晶粒中的滑移距离来实现的，假设总滑移长度在滑移方向上跨越晶粒。这些计算可以以两种方式进行。首先，分析发生在模拟开始时，因此只发生一次。如果使用这种方法，该工具的计算成本是分钟。然而，如果模拟考虑大的变形，在此期间，预期晶粒将经历大的旋转，则在分析期间使工具重新计算信息将是有利的。因此，计算成本将取决于建模几何形状的分辨率、晶粒的数量和滑移系的数量。该工具还提供了一个能力，开发本构模型的基础上，复杂的晶界功能，可以在经典的晶体塑性模型和梯度晶体塑性模型。所描述的计算过程是通过一个Fortran子程序，它已被设计成易于使用的晶体塑性模拟实现的。该工具还包括Python代码，旨在与使用DREAM.3D构建的微结构链接，以将所需的输入数据提取到Fortran子程序中。所提出的工具是不限于经典的晶体塑性配方，而不是从Fortran子程序提取和输出的数据可以用来在应力和应变梯度晶体塑性模型的替代目的。建议的工具可以修改，以提取额外的数据，以提供。相邻晶粒中的滑移距离、当前计算点到晶界的距离以及晶粒间滑移系之间的相互作用可用于任何晶体塑性本构模型。
A tool to implement a length scale dependency to classical crystal plasticity simulations is presented. Classical crystal plasticity models do not include a size effect; therefore, the size of the grain does not influence the simulated deformation. Classical crystal plasticity advancements have been through the inclusion of stress or strain gradient based constitutive models to improve the simulation of length scale dependent deformation. However, this tool presents an alternative to implementing a length scale, where the influence of slip pile-up in the form of dislocations at grain boundaries as a potential to explaining the Hall-Petch effect in materials. This is achieved by calculating the slip distance in adjacent grains for each slip system, by assuming the total slip length spans the grain in the slip direction. These calculations can occur in two ways. The first is the analysis occurs at the start of the simulation, therefore, only occurs once. If this approach is used, the computational cost of this tool is minute. However, if the simulations consider large deformations, during which it is expected that the grains are going to undergo large rotations, then it would be advantageous to the have the tool recalculate the information during the analysis. Consequently, the computational cost would depend on the resolution of the modelled geometry, the number of grains, and the number of slip systems. The tool also provides a capability to develop constitutive models based on complex grain boundary features which can be implemented in classical crystal plasticity models and gradient based crystal plasticity models. The described calculation process is implemented through a Fortran subroutine, which has been designed to be easily used in crystal plasticity simulations. The presented tool also includes Python code designed to link with microstructures built using DREAM.3D to extract the required input data to the Fortran subroutine. The proposed tool is not limited to classical crystal plasticity formulations, instead the data extracted and outputted from the Fortran subroutine can be used to serve alternative purposes in both stress and strain gradient crystal plasticity models. The proposed tool can be modified to extract additional data to that presented. The slip distance in the adjacent grain, the distance from the grain boundary of the current calculation point, and the interaction between slip systems between grains can be used in any crystal plasticity constitutive models.
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影响因子：
6
作者：
Nazarov, AA
通讯作者：
Nazarov, AA
DOI：
10.1007/bf02670762
发表时间：
1995-07-01
影响因子：
2.8
作者：
LUSTER, J;MORRIS, MA
通讯作者：
MORRIS, MA
影响因子：
1.6
作者：
SMITH, E;WORTHINGTON, PJ
通讯作者：
WORTHINGTON, PJ
影响因子：
1.6
作者：
ARMSTRONG, R;DOUTHWAITE, RM;PETCH, NJ
通讯作者：
PETCH, NJ
DOI：
10.1088/0370-1301/64/9/303
发表时间：
1951-01-01
期刊：
PROCEEDINGS OF THE PHYSICAL SOCIETY OF LONDON SECTION B
影响因子：
--
作者：
HALL, EO
通讯作者：
HALL, EO