| 板料激光弯曲成形及其数值模拟 |
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| 引用本文： | 季忠,吴诗惇.板料激光弯曲成形及其数值模拟[J].装备环境工程,1998(1). |
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| 作者姓名： | 季忠 吴诗惇 |
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| 作者单位： | 西北工业大学材料科学与工程学院
(季忠)，西北工业大学材料科学与工程学院(吴诗惇) |
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| 基金项目： | 航空基础科学基金资助课题 |
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| 摘 要： | 介绍了一种利用激光扫描板料时形成的不均匀温度场所诱发的热应力进行弯曲变形的技术。采用非耦合模型,用有限元法对成形过程中的三维瞬态温度场及形变场进行了数值模拟,定量地解释了板料激光弯曲的变形机理。文中还介绍了动态边界热流的引入方法及改进热弹塑有限元计算精度和收敛性的措施。模拟值与实测值吻合。
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| 关 键 词： | 板料 成形 激光束 热应力 有限元 |
Laser Forming of Sheet Metal and Its FEM Simulation |
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| Northwestern Ploytechnical University Ji Zhong Wu Shichun.Laser Forming of Sheet Metal and Its FEM Simulation[J].Equipment Environmental Engineering,1998(1). |
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| Authors: | Northwestern Ploytechnical University Ji Zhong Wu Shichun |
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| Institution: | Northwestern Ploytechnical University Ji Zhong Wu Shichun |
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| Abstract: | A new sheet forming technology is introduced in this paper,the forming mechanism is that the deformation is caused bythermal stress resulted from irradiation of laser beam scanning. Both transient temperature and deformation fields are simulated by 3D FEM based on uncoupling modles,and then the forming mechanism is quantatively analyzed. Some key techniques such as the handling of transient boundary heat flux and the selecting of weight factor .from elstic to plastic zone are also discussed. |
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| Keywords: | Sheet Forming Laser beam Thermal stress FEM |
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