径向压力辅助水力深拉是一项先进的板材成形技术,具有拉伸比高,表面质量好和尺寸精度高等优点.在拉伸过程中,底面和外边都受到水力的压力,因此变形均匀,失效可能性减小.与传统变形工艺相比,水力深拉技术更容易成形复杂形状的多层板材.破裂是板材成形过程中主要的不可逆的失效形式,破裂预测对确定和优化合适工艺参数具有重要作用.采用理论模型计算了径向压力辅助水力深拉成形双层锥形杯的临界破裂压力.讨论了其他参数如冲头半径、拉伸比、摩擦因数、板材厚度和材料性能等对临界破裂压力的影响.将所建模型与有限元模拟进行比较,并在Al1050/St13双层板材上进行试验验证,结果表明,试验结果与分析结果一致.
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