有限杆中不可逆相边界的传播规律及其应用  

Propagation of Irreversible Macroscopic Phase Boundaries along a Finite Rod under Dynamic Loading

作　　者：徐薇薇[1] 唐志平[1] 张兴华[1] 

机构地区：[1]中国科学技术大学中国科学院材料力学行为和设计重点实验室,安徽合肥230027

出　　处：《高压物理学报》2006年第4期365-371,共7页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金(10672158)

摘　　要：采用一种简单混合物相变本构模型,对不可逆相变材料有限杆中的宏观相边界传播规律进行了研究。结果表明,界面和加卸载条件对杆中相边界的传播有重要影响,不同界面条件下杆中新相体积含量的最终分布呈现出不同的形态。还解释了相变Taylor杆碰撞实验中发现的新现象,提出了利用冲击方法制备对称型梯度材料的可能性。The rules regarding the propagation of irreversible phase boundaries along a finite rod are investigated with a phase transition constitutive model based on the simple mixture theory. The results show that the boundary and loading/unloading conditions strongly affect the propagation pattern of the phase boundaries,and the final distribution shapes of the volume fraction for the product phase along the rod are different under various end boundaries. The new phenomena observed in the recent Taylor bar tests are explained in this paper, and the possibility for producing symmetric distributed functionally graded materials with impact method is proposed.

关 键 词：相边界 梯度材料 特征线法 相变Taylor杆试验 

分 类 号：O347.4[理学—固体力学]