摘要
为提高求解断裂参数的精度和效率,将光滑有限元法与虚拟裂纹闭合法相结合,提出光滑有限元-虚拟裂纹闭合法.对含不同长度和角度的倾斜裂纹复合材料圆板的断裂参数进行了求解,并与有限元-虚拟裂纹闭合法计算结果进行了对比.数值算例结果验证了该方法具有高精度,裂纹尖端处单元不需特殊处理,对网格尺寸要求低等优点,是分析断裂问题简洁高效的数值计算方法.
To improve the solution efficiency and accuracy of the fracture parameters, the smoothed finite element method-virtual crack close method was proposed based on the combination of these two methods. The fracture parameters of the composite material circular plate with different length and angle oblique cracks were solved, and the result was compared with that of the finite element method-virtual crack closure method. The calculation result confirms that this method has advantages of high accuracy, no special treatment on the elements at crack tip and less mesh resolution requirement. This method is simple but efficient for the calculation of fracture problems.
出处
《湖南大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2014年第8期36-40,共5页
Journal of Hunan University:Natural Sciences
基金
国家重大科学仪器设备开发专项项目(2012YQ030075)
国家自然科学基金资助项目(51305157)
吉林省科技厅基金资助项目(20130305006GX
201215048
201205011)
关键词
光滑有限元法
正交各向异性
虚拟裂纹闭合法
应变能释放率
应力强度因子
smoothed finite element method
orthotropic
Virtual Crack Closure Technique (VCCT)
strain energy release rate
stress intensity factor