改进SPH方法在陶瓷材料层裂数值模拟中的应用

章杰; 苏少卿; 郑宇; 王肖钧

doi:10.11883/1001-1455(2013)04-0401-07

改进SPH方法在陶瓷材料层裂数值模拟中的应用

doi: 10.11883/1001-1455(2013)04-0401-07

章杰^1, ,,
苏少卿^1,2,
郑宇^1,3,
王肖钧¹

1.
(1.中国科学技术大学近代力学系，安徽合肥230027；2.安徽建筑工业学院土木工程学院，安徽合肥230022；3.南京理工大学智能弹药技术重点实验室，江苏南京210094)

基金项目:

国家自然科学基金项目(11102205)

中国博士后科学基金项目(20100480686)

详细信息

通讯作者:
章杰

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出版历程
- 刊出日期: 2013-07-25

Application of modified SPH method to numerical simulation of ceramic spallation

1.
(1.Department of Modern Mechanics, University of Science and Technology of China, Hefei230027, Anhui, China;2.School of Civil Engineering, Anhui University of Architecture, Hefei230022, Anhui, China;3.Ministerial Key Laboratory of ZNDY, Nanjing University of Science and Technology, Nanjing210094, Jiangsu, China)

Funds:

Supported by the National Natural Science Foundation of China (11102205) 

摘要

摘要: 为了探讨铝飞片撞击陶瓷材料时的层裂现象，采用改进SPH方法模拟应力波在陶瓷材料中的传播。结果表明，当离散粒子分布不均匀时，数值模拟计算的自由面速度时程曲线与实测曲线吻合良好。对比CSPM方法，改进SPH方法的精度更高。提出适用于数值模拟的陶瓷材料损伤演化方程，对脉冲载荷下陶瓷/钢层合板层裂的破坏过程进行数值模拟，结果表明，由于陶瓷的波阻抗高于钢的，且抗压强度远高于抗拉强度，因此拉应力引起的层裂破坏是主要的。即使在材料内部传播的只是弹性压缩波，当弹性波到达材料界面时，由界面反射引起的卸载波也能导致陶瓷发生层裂破坏。
- 固体力学 /
- 侵彻层裂 /
- 改进SPH方法 /
- 损伤演化 /
- 陶瓷
Abstract:  To explore the spallation in ceramic impacted by an aluminum flyer, the modified SPH method was used to simulate the stress wave propagation in ceramic. The results show that the simulated free-surface velocity histories are in agreement with the experimental ones when the discrete particles are distributed non-uniformly. The precision of the results by the modified SPH method is higher than that by CSPM. And a damage evolution equation for ceramic was proposed to numerically simulate the spallation process of laminated ceramic-steel armor plates under pulse loading. The results display that the wave impedance in ceramic is much higher than that in steel and the spallation induced by tension stress is primary. Even though an elastic compression wave propagates in ceramic, the unloading wave reflected by the ceramic-steel interface can also lead to ceramic spallation.
- solid mechanics /
- spallation /
- modified SPH /
- damage evolution /
- ceramic