摘要
研究纯铜温镦粗试验,基于K-M-E模型建立了加工硬化率—位错密度和加工硬化率—应变模型。并把K-M-E模型嵌入有限元软件ABAQUS,通过试验检测和数值模拟,研究了显微硬度—流动应力、显微硬度—位错密度关系。结果表明,各个理论模型与试验结果较好吻合。显微硬度与流动应力成正比,与位错密度平方根成正比。
Through copper upsetting tests, the work-hardening rate-dislocation density model and work-hardening rate-strain model were established based on K-M-E model. Through writing the K-M-E model into the finite element software ABAQUS, the relations of micro- hardness-flow stress and micro-hardness-dislocation density were then researched based on tests and numerical simulations. The results showed that the theoretical models were in good accordance with the experimental results. Micro-hardness was proportional to flow stress, and was inversely proportional to the square root of dislocation density.
出处
《模具技术》
2010年第3期6-8,33,共4页
Die and Mould Technology
