ALOF——新一代三维疲劳裂纹扩展分析软件

ALOF:new 3D fatigue crack propagation analysis software

针对当前亟需开发能分析和评估含缺陷工程结构及装备的专业商业软件的现况,基于成熟的扩展有限元法(eXtended Finite Element Method,XFEM)和自主研发的虚节点法(Virtual Node Method,VNM),推出具有完全自主知识产权的三维疲劳裂纹扩展分析软件ALOF(Analyses Laboratory of Fracture).介绍ALOF求解断裂问题的流程及其特点:可以方便地导入完整的CAD模型及多种形式的裂纹模型,可以自动生成疏密合理的二维和三维裂纹扩展分析网格;具有丰富的失效准则库;能自动分层加密裂尖区域网格;能全自动地进行裂纹扩展计算等.与同类软件相比,ALOF更简单、更精准、更高效和更专业.利用ALOF进行的3个实际工程案例表明,ALOF能准确、高效评估任意复杂缺陷体的剩余强度和疲劳寿命.

As to the status quo that the professional business software to analyze and evaluate the flawed engineering structures and equipment is needed urgently,the mature algorithm eXtended Finite Element Method（XFEM） and the self-developed Virtual Node Method（VNM） are integrated to develop a fatigue crack propagation software entitled ALOF（Analyses Laboratory of Fracture）,which has the completely independent intellectual property rights of China.The solution process of ALOF is introduced for fracture problems and the features are detailed including the easy input of CAD and various kinds of cracking model,the automatic generation of 2D and 3D crack propagation analysis mesh with reasonable meshdensity,the abundant standard failure criteria,the hierarchical refined mesh around the cracking tip and the automatic cracking propagation computation and etc.Compared with the similar software,ALOF ismuch simpler and more precise,efficient and professional.Three practical engineering examples basedon ALOF indicate that it can evaluate the residual strength and fatigue life of any complex flawed engineering structures.