钢制金属I型夹芯板界面疲劳脱粘特性分析  

Analysis of interface fatigue debonding characteristics of type-I steel sandwich plate

作　　者：赵壮壮 杨军 刘刚[2,3] 韩正君 杨宏启[2] ZHAO Zhuangzhuang;YANG Jun;LIU Gang;HAN Zhengjun;YANG Hongqi(Marine Engineering Division,Shandong Electric Power Engineering Consulting Institute Co.,Ltd.,Jinan 250014,China;School of Naval Architecture Engineering,Dalian University of Technology,Dalian 116024,China;State Key Laboratory of Structural Analysis,Optimization and CAE Software for Industrial Equipment,Dalian 116024,China;Shanghai Division,China Ship Development and Design Center,Shanghai 201108,China)

机构地区：[1]山东电力工程咨询院有限公司海洋工程事业部,山东济南250014 [2]大连理工大学船舶工程学院,辽宁大连116024 [3]工业装备结构分析优化与CAE软件全国重点实验室,辽宁大连116024 [4]中国舰船研究设计中心,上海201108

出　　处：《中国舰船研究》2024年第2期165-172,共8页Chinese Journal of Ship Research

摘　　要：[目的]针对金属I型夹芯板界面的脱粘失效破坏,开展金属夹芯板界面疲劳脱粘特性分析。[方法]基于内聚力模型理论,考虑时间历程、三维结构节点多自由度的损伤演化方程与收敛判定准则,开发适用于三维复杂结构的界面疲劳脱粘模拟程序;与焊接接头脱粘实验结果进行对比,验证所开发程序的准确性,并进一步对钢制金属I型夹芯板的界面疲劳脱粘行为进行数值模拟。[结果]结果显示,所开发的三维界面疲劳脱粘数值模拟程序与焊接接头脱粘实验间最大的模拟误差仅为14.05%;I型夹芯板承受面外载荷时,夹芯板界面处的脱粘破坏主要表现为沿焊缝方向的表面裂纹扩展,当裂纹扩展至夹芯板长度的70%左右时,裂纹开始贯穿腹板形成贯穿裂纹。[结论]所开发的三维复杂结构界面疲劳脱粘程序可以实现对金属夹芯板界面疲劳脱粘寿命的有效评估,对实际工程应用具有一定的指导意义。[Objective]In view of the failure of type-I steel sandwich plate interfaces,this paper analyzes their interface fatigue debonding characteristics.[Methods]Based on the cohesive force model and considering the time history,damage evolution equations and convergence criteria of 3D structural nodes with multiple degrees of freedom,an interface fatigue debonding simulation program suitable for 3D complex structures is developed.The accuracy of the developed program is verified through a comparison with the experimental results of welding joint debonding,and the interface fatigue debonding behavior of type-I steel sandwich plates is simulated numerically.[Results]The results show that the maximum simulation error between the 3D interface fatigue debonding test and debonding experimentis only 14.05%.When an type-I sandwich plate is subjected to out-of-plane load,the debonding failure at the interface mainly manifests as surface crack propagation in the direction of the extended weld.When the crack propagation reaches about 70%of the length of the plate,the crack begins to penetrate through the web to form a penetrating crack.[Conclusion]The interface fatigue debonding program developed herein can effectively evaluate the interface fatigue debonding life of type-I steel sandwich plates,giving it certain guiding significance for practical engineering applications.

关 键 词：金属I型夹芯板 界面脱粘 内聚力模型 焊接缺陷 三维复杂结构 

分 类 号：U661.4[交通运输工程—船舶及航道工程]