Inhomogeneous Plastic Deformation and Change in Surface Profile of Metals and Polymers

金属和聚合物的不均匀塑性变形和表面轮廓的变化

• 批准号: 63550086
• 负责人: ABE Takeji
• 金额: $ 1.22万
• 依托单位: Okayama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1989
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63550086/
• 关键词: Plastic Deformation; Inhomogeneous Deformation; Surface Roughness; Polycrystalline Metal; Polymer; Scanning Electron Microscope

The present study consists of experimental and analytical studies of inhomogeneous deformation and change in surface shape of metals and polymers. The stylus instrument for surface roughness measurement and the scanning electron microscop was used in the experiment, while numerical simulation based on the finite element method and models of inhomogeneous material was employed.Iron specimen were used to study the relation between surface roughness and deformation of grains in polycrystals. The image processing technique was also incorporated in the measurement of microscopic inhomogeneous deformation. Brass specimens composed of alpha-phase and beta-phase were also used to study the mechanism of deformation of two-phase metal. Various commercial polymers were used to study the surface roughening during plastic deformation. The change in surface morphology was also studied by the scanning electron microscope, where the ion-coater instrument was used to put the gold coating film on the polymer specimens. It was found that the surface roughening occurs on the surface of the crystalline polymers, while no surface roughening was observed on the amorphous polymers.Numerical simulation of surface roughening during large plastic deformation of inhomogeneous material was performed with the finite strain version of the elastic-plastic unite element method. The effects of the material inhomogeneity and the surface instability were discussed based on the calculated results. The inhomogeneous deformation of rubber compound was also simulated based on the Mooney-Rivlin constitutive law.

本研究包括金属和聚合物的不均匀变形和表面形状变化的实验和分析研究。实验采用触针式表面粗糙度测量仪和扫描电子显微镜，并采用基于有限元方法和非均匀材料模型的数值模拟，以铁试件研究了表面粗糙度与晶粒变形的关系。在多晶中。图像处理技术也被纳入微观不均匀变形的测量中。由α相和β相组成的黄铜试样也被用来研究两相金属的变形机制。使用各种商业聚合物来研究塑性变形过程中的表面粗糙化。还通过扫描电子显微镜研究了表面形貌的变化，其中使用离子镀膜仪将金镀膜涂在聚合物样品上。结果发现，结晶聚合物的表面发生了表面粗糙化，而非晶态聚合物则没有观察到表面粗糙化。利用有限应变版本的弹性模型对非均匀材料大塑性变形过程中的表面粗糙化进行了数值模拟。塑性联合元法。根据计算结果讨论了材料不均匀性和表面不稳定性的影响。还基于Mooney-Rivlin本构定律模拟了橡胶混合物的不均匀变形。

项目成果

T.Nishiyama, T.Abe.: Proceeding of III Conference of Asian-Pacific Congress on Strength Evalution. (1989)

T.Nishiyama, T.Abe.：第三次亚太强度评估大会会议记录。

M. Ochi and T. Abe: "Analysis of Rubber Compound" J. Japanese Rubber Soc., Vol.63, 1990.

M. Ochi 和 T. Abe：“橡胶化合物的分析”J. Japanese Rubber Soc.，第 63 卷，1990 年。

T.Nishiyama,T.Abe: "Three Dimensional Observation of Surface Roughening of Polycrystalline Iron during Plastic Deformation" Proceeding of III Conference of Asian-Pacific Congress on Strength Evaluation. 309-314 (1989)

T.Nishiyama，T.Abe：“塑性变形过程中多晶铁表面粗糙化的三维观察”第三届亚太强度评估大会会议论文集。

T.Abe,T.Isumikawa,S.Nagaki,T.Yoshikawa: "Surface Roughening of Inhomogeneous Material during Large Plastic Deformation" Current Japanese Materials Research. 7.

T.Abe，T.Isumikawa，S.Nagaki，T.Yoshikawa：“大塑性变形过程中非均匀材料的表面粗糙化”当前日本材料研究。

T. Abe: "Material Research and Numerical Simulation" Kikaino-kenkyu. Vol.42. 341-347 (1990.)

T. Abe：“材料研究和数值模拟”Kikaino-kenkyu。