摘要
微通道扁管是平行流换热器的核心部件,极限承压能力是其最重要的性能指标之一。基于ABAQUS有限元软件,采用显式动力算法,结合GTN材料损伤模型,建立了折叠微通道铝扁管压爆试验的有限元分析模型,用于分析和预测折叠扁管的承压能力。通过与实际压爆试验对比,仿真计算得到的极限承压值和残余鼓包凸度与实测误差在5%以内,验证了有限元仿真模型的正确性。利用经过验证的有限元模型,分析了不同孔数、辊弯角减薄量和辊弯角度对折叠扁管的极限承压值影响,结果表明:增多孔数、减小辊弯角减薄量和辊弯角度均有利于提高折叠管极限承压值,其中扁管的孔数对极限承压值影响最大。
As the core component of parallel flow heat exchangers,the ultimate pressure bearing capacity is one of the most important performance indexes of the micro-channel flat tube. Combining with GTN damage model,the FEA models of bursting test for micro-channel folded tube were employed to analyze and predict the pressure bearing capacity of folded tube based on ABAQUS. Comparing with the bursting test results,the errors of ultimate pressure bearing value and the residual convex degree between simulation and actual test are under 5%,which verifies the correctness of the FEA models. Finally,the effects of number of holes,limiting thickness reduction of bending angle and value of bending angle on ultimate pressure bearing value were studied by using the FEA model. The simulation results show that increasing the number of holes,limiting thickness reduction of bending angle and decreasing the value of bending angle are contributed to enhancing the ultimate pressure bearing value of folded tube,among which the number of holes has the most impact.
出处
《塑性工程学报》
CAS
CSCD
北大核心
2017年第1期152-159,共8页
Journal of Plasticity Engineering
基金
国家科技支撑计划(2012BAF01B06)
关键词
折叠微通道扁管
GTN模型
极限承压值
压爆试验
micro-channel folded tube
GTN damage model
ultimate pressure-carrying value
bursting test
