|
|
| |
| 基于分层结构的UELMAT用户实体单元的建模与可视化 |
| Modeling and visualization of UELMAT user continuum elements based on layered structure |
| 投稿时间：2023-10-13 修订日期：2023-11-15 |
| DOI： |
| 中文关键词: UELMAT 分层结构 可视化 UVARM 用户实体单元 |
| 英文关键词:UELMAT Layered structure Visualization UVARM User continuum elements |
| 基金项目: |
|
| 摘要点击次数: 211 |
| 全文下载次数: 0 |
| 中文摘要: |
| 为在ABAQUS中快速实现基于用户实体单元的有限元模型，调用ABAQUS内置本构模型，可视化材料积分点处的计算结果，并提高子程序代码的重用性，本文设计了一种便捷的用户实体单元建模和可视化方法。该方法使用分层结构定义基于用户实体单元的有限元模型，并使用可调用ABAQUS内置本构模型的UELMAT子程序实现用户实体单元。为解决输出数据库文件无法保存材料积分点处结果的问题，该方法还使用了UVARM子程序结合内核脚本接口将结果写入输出数据库文件。该方法的子程序代码不再需要跨单元的数据传递，因此子程序代码具有很好的重用性。为验证该方法的可靠性，本文实现了基于四边形双线性单元的平面应力单元Q4S和使用B-bar方法的平面应变单元Q4EB，并分别与ABAQUS内置单元CPS4和CPE4在线弹性和小变形弹塑性算例的计算结果进行了对比。结果表明，用户实体单元Q4S和Q4EB可获得和CPS4和CPE4完全一致的计算结果。该方法可为调用内置本构关系的UELMAT用户实体单元的快速建模和可视化提供借鉴。 |
| 英文摘要: |
| In this paper, a convenient method for modeling and visualization of user continuum elements is designed in order to implement a finite element model quickly based on user continuum elements in ABAQUS, call the built-in constitutive models of ABAQUS, visualize the calculation results at material integration points and improve the reusability of subroutine. This method uses a layered structure to define a finite element model based on user continuum elements, implemented by UELMAT subroutine which can call the ABAQUS built-in constitutive models. For the purpose of saving the calculation results at the material integral points in the output database file, this method also uses the UVARM subroutine combined with the ABAQUS kernel script interface to write the results into the output database file. The subroutine of this method no longer requires cross-element data exchange, so the subroutine has good reusability. To verify the reliability of this method, a bilinear plane stress element Q4S and a plane strain element Q4EB is then implemented by B-bar approach, and the results with CPS4 and CPE4 elements are compared in some linear elasticity and small deformation elastic-plastic cases. The results indicate that Q4S and Q4EB can obtain consistent results with CPS4 and CPE4. This method provides reference for fast modeling and visualization of UELMAT user continuum element by calling built-in constitutive models. |
| 查看/发表评论 下载PDF阅读器 |
