摘要
通过系列的低速试验,对撞击载荷下曲板的破坏特性进行研究,并在有限元软件ABAQUS中进行数值模拟。试验结果表明曲板的变形包括局部凹陷和整体变形两个部分,破坏形式为花瓣式撕裂。为了保证有限元计算的准确性,通过材料拉伸试验和有限元迭代修正结合的方法测定相关的材料参数。采用JOHN-SON-COOK材料模型拟合相关数据,结果表明有限元计算能够有效地预报结构的变形和破损情况。
A series of low velocity impact tests and numerical simulation results were presented, which examine the failure of curved panels struck by a mass. The test results showed that the deformation of the curved panels include global deflection and local indentation. The petalling tearing failure often appears on the place of local indentation. Quasi-static tensile tests on high strength steel axisymmetric smooth and notched specimens were carried out, parallel numerical simulations of the tests were per- formed by Abaqus. Based on the experimental and numerical results, some material parameters of the Johnson-Cook constitutive model and fracture model were obtained. It has been found that the numerical simulation could predict the deformation and failure of the curved panels.
出处
《船海工程》
2011年第6期12-16,共5页
Ship & Ocean Engineering
基金
国家自然科学基金项目(10702022)
关键词
曲板
撞击试验
花瓣开裂
材料拉伸试验
数值仿真
curved panel
impact test
petalling failure
tensile test
numerical simulation
