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基于ANSYS的铝合金厚板淬火过程热力耦合数值分析 被引量:5

Coupled thermal-mechanical simulation on quenching of aluminum alloy thick-plate based on ANSYS
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摘要 基于ANSYS的参数化设计语言和用户界面设计语言,建立铝合金厚板淬火过程的热力耦合分析模型,实现模型的参数化和分析过程的流程化,探讨铝合金厚板在淬火过程中的应力变化和淬火后的残余应力分布规律。研究结果表明:在淬火过程中,铝合金厚板面部金属经历了由受拉状态到受压状态的转变,心部金属经历了从受压状态到受拉状态的转变,残余应力具有面部为压应力、心部为拉应力的空间分布特征;残余应力随着铝合金板厚度的增加而增大,当厚度增加到一定值(80 mm)时,厚度的增加对残余应力的影响不明显;残余应力随表面换热系数的增加而增加,表明通过改进淬火工艺能获得较小残余应力;以铝合金板与冷却水间的热交换达到平衡时的时间作为时间步,适合于铝合金厚板热力耦合作用过程的分析计算。 The coupled thermal mechanical analysis model of quenched aluminum alloy thick plates was built using ANSYS parametric design language and user interface design language.The parametric simulation and process flow were realized.The rules were explored for the stress of aluminum alloy thick plates to change on quenching and for the residual stress to be formed after quenching.The results indicate that tensile stress is transformed into compressive stress for the surface of aluminum alloy thick plats,while compressive stress is transformed into tensile stress on quenching for the center of aluminum alloy thick plates.The distribution feature of residual stress is taken on compressive stress on surface and tensile stress in center.The residual stress increases with the increase of thickness,but the effect is not obvious when the width increases at a certain degree(80 mm).The residual stress also increases with the increase of surface heat transfer coefficients.The residual stress can be diminished by improving the quench technology.The time step that the heat transfer between aluminum alloy plates and water arrived at balances is adapted to the simulation of the quenched aluminum alloy thick plates.
出处 《中南大学学报(自然科学版)》 EI CAS CSCD 北大核心 2010年第6期2207-2212,共6页 Journal of Central South University:Science and Technology
基金 国家重点基础研究发展计划("973"计划)项目(2005CB6237082010CB731703)
关键词 铝合金厚板 淬火 热力耦合 残余应力 参数化数值分析 aluminum alloy thick plates quenching thermal mechanical coupling residual stress parametric numerical simulation
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