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首页> 外文期刊>Finite elements in analysis & design >Sensitivity analysis by the adjoint variable method for optimization of the die compaction process in particulate materials processing
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Sensitivity analysis by the adjoint variable method for optimization of the die compaction process in particulate materials processing

机译：伴随变量法的敏感性分析，用于优化颗粒材料加工中的压模过程

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Nonuniform shrinkage during sintering results from the nonuniform green density distribution in a compacted powder body and this creates a severe problem in net-shape forming. Therefore, proper selection of the process parameters, such as compaction die design, upper and lower punch displacements, and sequential tool motion, is very important for the optimum design of die compaction processing. Previously, these were guess-estimated based on experience. As a first step in developing a more scientific design technique in powder metallurgy, the equations for the adjoint variable method (AVM) for the non-steady-state uniaxial powder compaction process are derived in detail. The accuracy of the AVM is verified through the comparison of the design sensitivity with calculations performed using the finite difference method.
机译：烧结过程中的不均匀收缩是由压实的粉末体中不均匀的生坯密度分布引起的，这在网状成形中产生了严重的问题。因此，正确选择工艺参数，例如压模设计，上下冲头位移以及连续的刀具运动，对于压模加工的最佳设计非常重要。以前，这些都是根据经验进行的猜测估计。作为开发更科学的粉末冶金设计技术的第一步，详细推导了用于非稳态单轴粉末压制过程的伴随变量法（AVM）的方程式。通过比较设计灵敏度与使用有限差分法执行的计算，可以验证AVM的准确性。

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