脆性颗粒材料的超弹性软化模型及应变局部化模拟
发布时间：2019-04-29 19:46
【摘要】：在Volokh软化模型的基础上,考虑颗粒材料的变形和破坏机制,认为颗粒材料以剪切变形和破坏为主,提出了表示软化程度的软化因子概念,发展了两种能够部分表征颗粒材料力学行为特征的软化模式,并基于ABAQUS用户材料子程序(UMAT)开发相应程序.数值算例考察了上述模型模拟颗粒材料应变局部化现象和软化现象的能力.结果表明了所建议模型的有效性和可行性.
[Abstract]:On the basis of Volokh softening model, considering the deformation and failure mechanism of granular materials, it is considered that the shear deformation and failure are the main factors for granular materials, and the concept of softening factor is put forward to show the softening degree. Two softening modes which can partially characterize the mechanical behavior of granular materials have been developed and the corresponding programs have been developed based on ABAQUS user material subroutine (UMAT). Numerical examples are given to investigate the ability of the above model to simulate strain localization and softening of granular materials. The results show that the proposed model is effective and feasible.
【作者单位】： 武汉大学土木建筑工程学院;
【基金】：国家自然科学基金资助项目(10802060;11172216;11472196) 国家重点基础研究发展计划项目(2010CB731502) 湖北省自然科学基金资助项目(2013CFB287)
【分类号】：O343
，
本文编号：2468480
[Abstract]:On the basis of Volokh softening model, considering the deformation and failure mechanism of granular materials, it is considered that the shear deformation and failure are the main factors for granular materials, and the concept of softening factor is put forward to show the softening degree. Two softening modes which can partially characterize the mechanical behavior of granular materials have been developed and the corresponding programs have been developed based on ABAQUS user material subroutine (UMAT). Numerical examples are given to investigate the ability of the above model to simulate strain localization and softening of granular materials. The results show that the proposed model is effective and feasible.
【作者单位】： 武汉大学土木建筑工程学院;
【基金】：国家自然科学基金资助项目(10802060;11172216;11472196) 国家重点基础研究发展计划项目(2010CB731502) 湖北省自然科学基金资助项目(2013CFB287)
【分类号】：O343
，
本文编号：2468480
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