Strategic Manufacturing Initiative: Computer-Integrated Analysis of Deformation Processing

研究的总体目标是提高材料变形加工的计算机集成分析的科学基础。本研究包括四个主要方向：(1)将对多晶金属进行物理和计算大变形实验，以建立现象学本构方程，捕捉由于晶体织构而引起的力学各向异性随变形增加的演变；(2)将进行物理实验，以制定和评估工具/工件界面摩擦和传热特性的改进状态变量型连续表示；(3)将开发包含增强工件和界面构成方程的耦合热-机械有限元计算程序；(4)实验室尺度的变形处理操作将被执行，仪器化，并与数值模拟进行严格比较，以评估本构方程和计算程序的预测能力。这项研究是学术界、一家致力于变形过程计算机集成模拟的材料公司和一家先进固体力学软件应用开发商的合作成果。

The overall goal of the research is to improve the scientific basis for computer-integrated analysis of the deformation processing of materials. The research consists of four major thrusts: (1) physical and computational large deformation experiments will be conducted on polycrystalline metals in order to formulate phenomenological constitutive equations which capture the evolution, with increasing deformation, of mechanical anisotropy due to crystallographic texturing; (2) physical experiments will be conducted in order to formulate and evaluate improved state-variable type continuum representation of frictional and heat transfer characteristics at the tool/workpiece interface; (3) coupled thermo-mechanical finite element computational procedures will be developed which incorporate the enhanced workpiece and interface constitute equations; and (4) laboratory- scale deformation processing operations will be conducted, instrumented, and critically compared with numerical simulations in order to assess the predictive capabilities of the constitutive equations and computational procedures. The research represents a collaboration of investigators from academia, a materials company committed to computer-integrated simulation of deformation processing, and a developer of advanced solid mechanics software applications.