A physics based model to simulate brittle crack arrest in steel plates incorporating experimental and numerical evidences
A physics based model to simulate brittle crack arrest in steel plates incorporating experimental and numerical evidences
复制标题
DOI：
10.1016/j.engfracmech.2019.106660
复制
发表时间：
2019-11
影响因子：
5.4
通讯作者：
F. Yanagimoto;Kazuki Shibanuma;Katsuyuki Suzuki;Toshiyuki Matsumoto
中科院分区：
文献类型：
--
作者：
F. Yanagimoto;Kazuki Shibanuma;Katsuyuki Suzuki;Toshiyuki Matsumoto
本研究提出了一个基于物理的模型来模拟钢板的脆性裂纹止裂，基于局部断裂应力准则，结合实验和数值证据的实际现象的脆性裂纹扩展/制动行为。为了准确地模拟脆性裂纹扩展行为的实际现象，本研究模拟了局部拉伸应力在附近的扩展裂纹尖端，闭合应力的完整的剪切唇，剪切唇厚度的基础上，一系列的有限元分析和裂纹扩展实验。将该模型应用于模拟温度梯度止裂试验，成功地预测了脆性止裂韧性和止裂长度的温度依赖性。
This study proposes a physics based model to simulate brittle crack arrest in steel plates, based on the local fracture stress criterion by incorporating experimental and numerical evidences of actual phenomena of brittle crack propagation/arrest behaviors. To accurately simulate actual phenomena of brittle crack propagation behavior, this study modelled the local tensile stress in the vicinity of a propagating crack tip, closure stress of unbroken shear lip, and shear lip thickness based on a series of finite element analyses and crack propagation experiments. The proposed model was applied to simulate temperature gradient crack arrest tests, and it successfully predicted the temperature dependency of brittle crack arrest toughness and crack arrest lengths.