首页> 外文会议>Fracture and strength of solids VII >Probabilistic Fracture Mechanics Analysis of Multiple Cracks in Cylindrical Pressure Vessel
【24h】

Probabilistic Fracture Mechanics Analysis of Multiple Cracks in Cylindrical Pressure Vessel

机译:圆柱压力容器中多个裂纹的概率断裂力学分析

获取原文
获取原文并翻译 | 示例

摘要

In this work, a probabilistic fracture mechanics analysis of multiple cracks in a cylindrical pressure vessel was conducted. The analysis was performed to predict service life of a pressure vessel with a certain level of reliability if the vessel has a multiple internal surface cracks that interact each other. The stress intensity factor of multiple cracks configuration was determined from the stress intensity factor of a single surface crack in a plate subjected to uni-axial load and the interaction factor between the cracks. In this work, the Swift's crack link-up criterion was employed. These parameters together with several other stochastic parameters, i.e. initial crack size, Paris's crack propagation constants and fracture toughness, were then used to calculate the probability of failure with a certain level of reliability. The failure probability was simulated using guided direct simulation, for cycle-by-cycle crack propagation, to find the expected service life and the mode of failure (leak or break). A case study of a high-pressure vessel having different initial crack sizes have been simulated and the service life with 99,99% reliability were determined.
机译:在这项工作中,对圆柱形压力容器中的多个裂纹进行了概率断裂力学分析。如果压力容器具有相互影响的多个内表面裂纹,则进行该分析以以一定的可靠性预测压力容器的使用寿命。由单轴载荷的板中单表面裂纹的应力强度因子和裂纹之间的相互作用因子确定多重裂纹构型的应力强度因子。在这项工作中,采用了Swift的裂缝链接准则。然后将这些参数与其他一些随机参数(即初始裂纹尺寸,Paris的裂纹扩展常数和断裂韧性)一起用于计算具有一定可靠性水平的失效概率。使用引导直接仿真对故障概率进行仿真,以逐周期进行裂纹扩展,以找到预期的使用寿命和故障模式(泄漏或断裂)。模拟了一个具有不同初始裂纹尺寸的高压容器的案例研究,确定了具有99,99%可靠性的使用寿命。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号