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
赵壮壮 1杨军 2刘刚 3韩正君 4杨宏启2
作者信息
- 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. 大连理工大学 船舶工程学院,辽宁 大连 116024;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
- 折叠
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.
Abstract
[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 consid-ering the time history,damage evolution equations and convergence criteria of 3D structural nodes with mul-tiple degrees of freedom,an interface fatigue debonding simulation program suitable for 3D complex struc-tures is developed.The accuracy of the developed program is verified through a comparison with the experi-mental results of welding joint debonding,and the interface fatigue debonding behavior of type-Ⅰ steel sand-wich 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 sur-face 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 inter-face 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Key words
type-Ⅰ metal sandwich panel/interface debonding/cohesive force model/weld defects/3D complex structure引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据