| 基于近场动力学方法的含缺陷板Ⅰ型应力强度因子计算 |
| |
| 引用本文： | 徐鹏程,徐业鹏,徐小辉.基于近场动力学方法的含缺陷板Ⅰ型应力强度因子计算[J].粉煤灰综合利用,2020(1):1-6. |
| |
| 作者姓名： | 徐鹏程 徐业鹏 徐小辉 |
| |
| 作者单位： | 河海大学力学与材料学院;北京特种工程设计研究院 |
| |
| 基金项目： | 国家重点研发计划(2018YFC0406703);国家自然科学基金(51679077,11932006);中央高校基金科研业务费(2017B13014)。 |
| |
| 摘 要： | 针对含多缺陷板脆性断裂问题,引入非局部近场动力学理论,结合J积分计算含缺陷板Ⅰ型应力强度因子。通过含Ⅰ型单裂纹脆性板以及系列含等长双裂纹板的应力强度因子计算,验证该方法的可行性和计算精度。进一步应用于含不等长双裂纹、含孔及孔边裂纹脆性板的应力强度因子计算,验证了该方法对于计算含复杂缺陷板Ⅰ型应力强度因子的适用性,并分析了裂纹位置和长度及孔径等多缺陷板裂尖应力强度因子的影响。
|
| 关 键 词： | 断裂 应力强度因子 J积分 近场动力学 多裂纹 |
Calculation of Mode-Ⅰ Stress Intensity Factor of Plates with Defects Based on Peridynamic Method |
| |
| XU Pengcheng,XU Yepeng,XU Xiaohui.Calculation of Mode-Ⅰ Stress Intensity Factor of Plates with Defects Based on Peridynamic Method[J].Fly Ash Comprehensive Utilization,2020(1):1-6. |
| |
| Authors: | XU Pengcheng XU Yepeng XU Xiaohui |
| |
| Affiliation: | (College of Mechanics and Materials,Hohai University,Nanjing 211100,China;Beijing Special Engineering and Design Institute,Beijing 100028,China) |
| |
| Abstract: | For analyzing the brittle fracture of plates with multi-defects, a method on calculate mode-Ⅰ stress intensity factor of plates with defects through J integral based on non-local peridynamic theory was proposed. The capability and accuracy of the proposed method were verified through calculation of stress intensity factors in a brittle plate with single mode Ⅰ crack and in plates with two equal-length cracks. The capability of the proposed method of handling fracture of plates with multi-defects was validated by calculating the stress intensity factors at crack tips in plates with two unequal-length cracks and with cracks connected to a hole. The influence of location and length of initial cracks as well as radius of the hole on the stress intensity factor at crack tips was investigated further in the article. |
| |
| Keywords: | fracture stress intensity factor J-integral peridynamics multi-crack |
| 本文献已被 CNKI 维普 等数据库收录！ |
