论文部分内容阅读
建立了一种焊缝凝固裂纹力学分析模型。在焊缝凝固过程中，对固液混合区金属采用了基于流变力学观点建立的力学木构方程，在焊接凝固过程应力应变分析的基础上，编制了数值计算源程序。计算了铝合金ＬＹ１２ＣＺ不同熔敷焊接（Ｂｅａｄ－ｏｎ－ｐｌａｔｅＷｅｌｄｉｎｇ）条件下焊缝凝固过程的应力应变，并进行了凝固裂纹的预测。计算结果定量地揭示了焊缝凝固过程应力应变的变化规律，并从力学角度揭示了焊接条件对焊接凝固裂纹形成的影响。
A mechanical analysis model of weld solidification crack was established. In the course of the solidification of the weld, the mechanics and wood equation established on the basis of the rheological mechanics was adopted for the metal in the solid-liquid mixing zone. Based on the stress and strain analysis during the process of welding and solidification, the numerical calculation program was compiled. The stress and strain of the weld during the solidification of the weld under the conditions of Bead-on-plate Welding under aluminum alloy LY12CZ were calculated and the prediction of the solidification cracking was carried out. The results of the calculation quantitatively revealed the variation of stress and strain in the process of weld solidification and revealed the influence of welding conditions on the formation of weld solidification cracks from the mechanical point of view.