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基于热力耦合原理及虚功原理建立锻件快速成形的显式动力学模型,利用LS-DYNA软件仿真分析其成形过程中锻件的力学特性变化,分析不同工况下锻件成形过程中的动态特性变化。结果表明:随着打击能量的增加,锻件的应力应变及冲击载荷不断增加;相同打击能量、不同锻件初始温度下,随着锻造的温度升高,锻件的冲击载荷不断降低。分析结果将有助于准确获得锻件成形所需要的打击能量,以达到节能环保及降低对锻造设备冲击的目的。
Based on the principle of thermo-mechanical coupling and the principle of virtual work, an explicit dynamic model of forging rapid prototyping was established. The change of mechanical properties of the forging during the forming process was simulated by LS-DYNA software and the dynamic characteristics of the forging during different forming conditions were analyzed. The results show that with the increase of striking energy, the stress, strain and impact load of the forging increase continuously. With the same striking energy and the initial temperature of different forging, as the forging temperature increases, the impact load of the forging decreases. The results of the analysis will help to accurately obtain the impact energy required for forging forming in order to save energy and reduce the impact on forging equipment.