【摘要】：為了建立精細有限元模型,提高焊縫疲勞壽命仿真預測精度,需準確獲取焊縫區(qū)的組織及材料力學性能分布.通過金相試驗得到了焊縫區(qū)域組織分布,結(jié)合硬度試驗和經(jīng)驗公式獲取了焊縫微小區(qū)域組織應力-應變曲線參數(shù).根據(jù)試驗結(jié)果分析提出一種焊縫分區(qū)建模方法,并利用準靜態(tài)拉伸試驗驗證了該方法的正確性,為進一步分析焊縫區(qū)域失效機制以及預測疲勞壽命奠定了基礎.
[Abstract]:In order to establish a fine finite element model and improve the prediction accuracy of fatigue life of weld seam, the distribution of microstructure and material mechanical properties in weld zone should be accurately obtained. The microstructure distribution in weld zone was obtained by metallographic test, and the stress-strain curve parameters were obtained by hardness test and empirical formula. Based on the analysis of test results, a method of weld zone modeling is proposed, and the validity of the method is verified by quasi-static tensile test, which lays a foundation for further analysis of failure mechanism of weld zone and prediction of fatigue life.
【作者單位】： 上海交通大學機械系統(tǒng)與振動國家重點實驗室上海市復雜薄板結(jié)構(gòu)數(shù)字化制造重點實驗室;
【分類號】：TG40

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