异形截面构件多工序充液成形工艺及过程优化

汽车悬架臂零件为异形截面构件,是汽车底盘结构件的典型代表之一。为了提高材料利用率和成形效率,悬架臂零件采用一坯两件生产方式。基于动力显示有限元软件Dynaform,对充液成形多工序工艺路线进行数值模拟,并结合正交试验,研究主要工艺参数对充液成形的影响。在此基础上进行弯曲、预成形和充液成形工艺试验。研究结果表明:多工序充液成形有限元模拟结果与试验结果基本一致。在补料压力30 MPa、补料量15 mm、摩擦因数0.06时,成形出合格零件。

在双向偏压作用下钢筋混凝土异形构件的非线性分析

基于双向偏压作用下钢筋混凝土异形截面构件的材料非线性和几何非线性 ,提出一种新的简便可行的截面积分分析方法 ,由此推导出异形截面构件的割线、切线刚度计算公式。用该法对在双向偏压作用下钢筋混凝土异形截面构件进行了全过程非线性分析 。

RESEARCH ON T SHAPED HIGH STRENGTH CONCRETE MEMBERS SUBJECTED TO AXIAL COMPRESSION AND BIAXIAL BENDING

Based on experiments, a computer program is developed. The calculated results agree well with the experimental results. The flexural behavior of T shaped high strength concrete members subjected to axial compression and biaxial bending is studied. The main factors affecting the flexural behavior of T shaped high strength concrete members are loading angle, axial compression ratio and reinforcement ratio.