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.

本研究包括对金属和聚合物表面形状不均变形的实验和分析研究。实验中使用了用于表面粗糙度测量和扫描电子显微镜的手写笔仪器，而基于有限元方法的数值仿真和使用了不均匀材料的模型。图像处理技术还纳入了微观不均匀变形的测量中。由α期和β期组成的黄铜标本也用于研究两相金属变形的机理。在塑性变形过程中，使用各种商业聚合物研究表面粗糙。还通过扫描电子显微镜研究了表面形态的变化，该扫描电子显微镜使用离子 - 位仪器将金涂层膜放在聚合物样品上。发现表面粗糙发生在晶体聚合物的表面上，而在无定形聚合物上未观察到表面粗糙。在弹性塑性元素元素方法的有限株版本中，对表面粗糙的数量模拟进行了较大的不均匀材料的塑性模拟。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的本构定律模拟了橡胶化合物的不均匀变形。

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。