CAJ | 학술논문

研究了超塑成形/扩散连接钛合金空心“瓦伦”结构在旋转冲击载荷下失效行为的模拟方法。通过“固连失效接触”算法模拟了扩散连接焊缝，“瓦伦”结构局部应力集中和局部缺陷对焊缝强度的影响通过定义焊缝的等效拉伸和剪切强度加以考虑，并通过旋转冲击试验对数值模拟结果进行校核。结果表明，所提出仿真分析方法可有效地模拟空心“瓦伦”结构零部件在旋转冲击载荷下的失效行为。
연구료초소성형/확산련접태합금공심“와륜”결구재선전충격재하하실효행위적모의방법。통과“고련실효접촉”산법모의료확산련접한봉，“와륜”결구국부응력집중화국부결함대한봉강도적영향통과정의한봉적등효랍신화전절강도가이고필，병통과선전충격시험대수치모의결과진행교핵。결과표명，소제출방진분석방법가유효지모의공심“와륜”결구령부건재선전충격재하하적실효행위。
A modeling method to simulate the failure of a superplastic forming/diffusion bonding titanium Warren girder structure under whirligig impact load was investigated herein.In the proposed model,the effects of local stress concentration and local defect distribution at the girder areas were considered by defining effective tensile and shear strengths.The diffusion bond was incorporated into the finite element model through tie-break contact algorithm.Then,the calibrated bond strength was implemented in the numerical model,of which the result was further compared with whirligig impact tests to validate the rationality of the modeling method.The results show that the proposed method can effectively simulate the failure of the Warren girder structure under whirligig impact load.