基于虚拟裂纹闭合法计算组合材料的应变能释放率  

BASED ON VIRTUAL CRACK CLOSE TECHNIQUE THE CALCULATION OF STRAIN ENERGY RELEASE RATE FOR COMPOSITE MATERIAL

作　　者：陈玉良[1] 程宸[2] 万水[2] 蒋正文[2] 

机构地区：[1]南京市公路建设处,江苏南京210008 [2]东南大学交通学院,江苏南京210096

出　　处：《玻璃钢／复合材料》2013年第3期8-12,共5页Fiber Reinforced Plastics/Composites

基　　金：国家自然科学基金(50978055);973项目(2012CB026200)

摘　　要：本文研究了将虚拟裂纹闭合法应用ANSYS有限元计算软件,计算组合材料的应变能释放率。在有限元计算中,为了减小后处理工作量,将弹簧单元施加在裂纹尖端。在实际的有限元计算中,COMBIN14单元被用来建立有限元模型,从而将求解过程和后处理过程联系起来,自动计算出能量释放率。随后,将该方法应用于计算组合材料的应变能释放率,进行数值模拟实验。通过分析比较数值计算结果和理论值,表明该数值分析方法所计算出的应变能释放率与理论值完全符合,该数值分析方法是一种高效,精确的数值分析方法。Compulation of the strain energy release rate for composite material, based on the virtual close tech- nique, is studied. During the calculation in the finite element, in order to reduce the processing workload, the spring element is applied at the tip of the crack. In practical applications, with Combinl4 spring elements are being adopted to establish the finite element model, the solving process and post process are linked, so the the energy re- lease rate can be calculated quickly. Then, this technique is applied to calculate the strain energy release rate for composite material, and the technique is taken to do numerical simulation experiment. Comparing the numerical re- sults and theoretical values, it shows that the calculated values of the strain strain energy release rate are well with the theoretical values. This numerical analysis method is an efficient and accurate numerical analysis method.

关 键 词：虚拟裂纹闭合法 ANSYS 应变能释放率 组合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]