The quasi - superplasticity of as - cast lead brass was studied by monodirectional elongation experiment 摘要采用单向拉伸对铸态铅黄铜进行了准超塑性研究。
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This paper firstly extends the thermal elastoplastic deformation theory of trilayered materials derived by suresh et al and abolishes the restrictive assumption to the monodirectional spread of plastic zone in the original model and the thermal elastoplastic analysis model which reflects the complete history of thermal elastoplastic deformation of the multilayered materials is built . this model can be also applied to the condition of the spread of plastic zones from both sides of plastic layers and has more applicability compared to suresh et al ' s model 论文首先推广了suresh等人建立的三叠层材料热弹塑性变形理论，取消了原理论模型中塑性区域单向扩展的限制性假设，建立了反映叠层材料完整热弹塑性变形历史的热弹塑性行为分析模型，该模型同时适用于塑性层的塑性区域双边扩展的情况，较suresh等人的模型适用性更为广泛。
