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梁伟, 村川英一. T形焊接接头固有变形逆解析方法的开发[J]. 焊接学报, 2013, (10): 79-82.
引用本文: 梁伟, 村川英一. T形焊接接头固有变形逆解析方法的开发[J]. 焊接学报, 2013, (10): 79-82.
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LIANG Wei, Murakawa Hidekazu. An inverse analysis method to estimate inherent deformation in T-fillet welded joints[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2013, (10): 79-82.
Citation: LIANG Wei, Murakawa Hidekazu. An inverse analysis method to estimate inherent deformation in T-fillet welded joints[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2013, (10): 79-82.
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T形焊接接头固有变形逆解析方法的开发

An inverse analysis method to estimate inherent deformation in T-fillet welded joints

    摘要
  • 摘要: 基于固有应变方法的弹性有限元方法是适用于大型复杂焊接结构件变形预测的有效方法,但这一方法得以运用的必要条件是必须已知存在于焊缝附近的固有变形.文中利用物理试验和数值模拟技术相结合的研究手段开发了典型焊接接头固有变形的逆解析数值计算方法.利用逆解析得到的固有变形值,采用固有应变弹性有限元方法对T形焊接接头的焊接变形进行了预测.通过比较数值模拟结果和试验测量值,验证了基于数值模拟技术的逆解析方法的求解精度.结果表明,T形焊接接头固有变形的逆解析算法是正确有效的.

     

    Abstract: CuZnSnSi alloy performs well on brazing steel.This paper aims at studying the thermal kinetics for the melting phase transition process with CuZnSnSi alloy as filler metal,by DSC and TG techniques and the differential and integral non-isothermal analysis methods.The results show that endothermic peak starts at 1150.5 K and ends at 1 221.5 K.The peak temperature of heat absorption is 1174.46 K.The endothermic peak in the heating process is lower than that in the cooling process while transforming without reaction,which indicates that undercooling is necessary to make the alloy crystallize.The calculated apparent activation energy is 615.72 kJ/mol and the transition rate varies withT as the function of k=1.71×1027exp(-6.16×105/RT).

     

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