Research Initiation: Modeling of Surface Roughening

该奖项旨在表彰在三维有限元程序中增加多晶滑移建模能力的研究，以预测块状材料变形过程中表面粗化的影响。这项工作扩展了目前在体变形过程中预测微观结构织构和各向异性材料性能的工作，并将表面粗化与自由表面上的单个晶粒联系起来。单个颗粒由网格的单个元素建模。采用实验和数值模拟相结合的方法验证了所开发的技术，并研究了表面粗糙度对工艺参数的敏感性。金属成形行业，如汽车工业和饮料罐工业依赖于板材成形工艺，表面粗糙是一个问题。改进对表面粗化现象的理解可能会从这里描述的工作中产生，并将使这些行业受益。

9410127 Dewhurst The award is for research involving the addition of polycrystal slip modeling capabilities to a three-dimensional finite element code to predict the effects of surface roughening during bulk material deformation. The work extends current work on the prediction of microstructural texture and anisotropic material properties during bulk deformation and relates surface roughening to individual grains on the free surface. Individual grains are modeled by individual elements of the mesh. A combined experimental and numerical simulation approach is taken to validate the techniques developed, and the sensitivity of the surface roughness to process parameters is investigated. Metalforming industries such as the automotive industry and the beverage can industry rely on sheet forming processes where surface roughening is a problem. Improved understanding of the phenomenon of surface roughening is likely to result from the work described here and would benefit these industries.