The expressions of load, displacement, stress and residual stress distribution for hole cold_extrusion process are established by using elastic_plastic theory.
利用弹塑性理论建立了孔冷挤压的载荷、位移、应力以及残余应力分布表达式；
The results show that the stress and strain distribution around the cold worked hole are similar between the model and real object.
结果表明：带衬套挤压和不带衬套冷挤压时孔边载荷的分布，模型材料与原型实际挤压结果相似；
According to the distribution of potential, electron and hole in the BNRT at different stages, the mechanism inducing S-type negative resistance characteristics is explained.
根据BNRT不同工作状态下的内部电势、电子浓度和空穴浓度分布，解释了其S型负阻特性的产生机理。
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