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中文摘要：
温度依赖者有弹性的 viscoplastic 材料模型被用于磨擦的数字模拟促使焊接过程。处于大变丑问题的 therate 依赖的材料的无弹性的反应被使用最靠近的点算法计算。数字结果证明相等的塑料紧张的形状看起来像洋葱戒指，戒指的间距近似等于在一旋转的工具的前面的运动。相等的塑料紧张由于大头针板接口的磨擦应力的增加随粘性系数的增加被增加。被旋转工具影响的区域与粘性系数的减少被减少。在大头针前面的光线、环绕的压力比在大头针后面的大。Thisdifference 能与粘性的减少被减少。
英文摘要：
Temperature-dependent elastic viscoplastic material model was used for the numerical simulation of the friction stir welding process. The non-elastic response of the rate-dependent material in the large deformation problems was calculated by using the closest point algorithm. The numerical results show that the shape of the equivalent plastic strain looks like onion rings and the spacing of the rings is approximately equal to the forward movement of the tool in one rotation. The equivalent plastic strain is increased with the increase of viscosity coefficient due to the increase of friction stress in the pin-plate interface. The region which is influenced by the rotating tool is decreased with the decrease of viscosity coefficient. The radial and circumferential stresses in front of the pin are greater than the ones behind the pin. This difference can be reduced with the decrease of viscosity.
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