Modelling brittle impact failure of disc particles using material point method
Modelling brittle impact failure of disc particles using material point method
复制标题
使用材料点法对圆盘颗粒的脆性冲击破坏进行建模
DOI：
10.1016/j.ijimpeng.2011.02.004
复制
发表时间：
2011
影响因子：
5.1
通讯作者：
Li F
中科院分区：
文献类型：
--
作者：
Li F
了解由玻璃、陶瓷和岩石等脆性材料制成的颗粒的冲击破坏对于许多工程应用来说是一个重要的问题。在撞击过程中，固体颗粒通过多个裂纹的发展变成许多碎片的离散集合体。有限元法基本上不适合模拟这种过渡。最近，一种所谓的材料点法（MPM）已被用于研究材料和结构失效的广泛问题。在本文中，我们提出了一个新的材料点模型的脆性破坏，其中包括一个统计失效准则。模拟多裂纹的方法的能力证明使用光盘粒子。实验观察到的三种冲击失效模式被捕获的模型：赫兹环裂纹，子午线裂纹，和多碎片裂纹。详细的应力分析进行解释的实验观察。特别是它示出的实验观察到的依赖性的临界速度的子午线裂纹的粒子尺寸的起始可以解释所提出的模型。材料点为基础的计划需要一个相对温和的编程工作，并避免节点分裂，这使得它非常有吸引力的传统有限元方法。
Understanding the impact failure of particles made of brittle materials such as glasses, ceramics and rocks is an important issue for many engineering applications. During the impact, a solid particle is turned into a discrete assembly of many fragments through the development of multiple cracks. The finite element method is fundamentally ill-equipped to model this transition. Recently a so-called material point method (MPM) has been used to study a wide range of problems of material and structural failures. In this paper we propose a new material point model for the brittle failure which incorporates a statistical failure criterion. The capability of the method for modelling multiple cracks is demonstrated using disc particles. Three impact failure patterns observed experimentally are captured by the model: Hertzian ring cracks, meridian cracks, and multi-fragment cracks. Detailed stress analysis is carried out to interpret the experimental observations. In particular it is shown that the experimentally observed dependence of a threshold velocity for the initiation of meridian cracks on the particle size can be explained by the proposed model. The material point based scheme requires a relatively modest programming effort and avoids node splitting which makes it very attractive over the traditional finite element method.
影响因子：
5.3
作者：
Fan Li;Jingzhe Pan;C. Sinka
通讯作者：
Fan Li;Jingzhe Pan;C. Sinka
平面应变拉伸载荷条件下裂纹的脆性损伤分析
DOI：
--
发表时间：
1995
期刊：
影响因子：
--
作者：
G. Tianfu;Yang Wei
通讯作者：
Yang Wei