| 聚丙烯(PP)冷压变形行为研究 |
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| 引用本文： | 曹宏深,陈金周,韩榜,程培元.聚丙烯(PP)冷压变形行为研究[J].中国制造业信息化,2011,40(21). |
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| 作者姓名： | 曹宏深 陈金周 韩榜 程培元 |
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| 作者单位： | 1. 郑州大学材料学院,河南郑州,450052
2. 武汉理工大学材料学院,湖北武汉,430070 |
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| 摘 要： | 采用镦粗变形对结晶型PP进行3种变形速度和4种变形程度的冷压变形实验,实验结果表明,镦粗变形的几何变形模式及其极限伸长率的几何性质与单向拉伸完全不同,但PP的屈服应力随变形速度增大而提高的现象与许多材料单向拉伸屈服应力相似。与此同时,冷压镦粗PP的延性大变形属于类塑性性质,其性质和数值与聚合物及其结构和变形回弹相关。虽然PP冷压镦粗后的回弹率很大,但回弹随变形速度提高而减小,因此为了研发聚合物锻造技术,需要提高变形速度或采用加热措施,或改用闭式锻造变形模式。
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| 关 键 词： | PP 冷压变形 镦粗 变形回弹 类塑性 |
Study on Deformation Behavior of PP under Cold Compression |
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| CAO Hong-shen,CHEN Jin-zhou,HAN Bang,CHENG Pei-yuan.Study on Deformation Behavior of PP under Cold Compression[J].Manufacture Information Engineering of China,2011,40(21). |
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| Authors: | CAO Hong-shen CHEN Jin-zhou HAN Bang CHENG Pei-yuan |
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| Affiliation: | CAO Hong-shen1,CHEN Jin-zhou1,HAN Bang1,CHENG Pei-yuan2(1.Zhengzhou University,Henan Zhengzhou,450052,China)(2.Wuhan University of Science and Technology,Hubei Wuhan,430070,China) |
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| Abstract: | Based on cold compression experiments for crystalline PP with upsetting deformation using three kinds of deformation rates and four kinds of deformation degree,it analyzes the geometric deformaton manner,proposes different limit elongation ratio of upsetting with tensile test.The result is similar with yielding behavior of many materials.And the large ductile deformation of PP is of plasticity-like behavior,whose character and value are related to deformation recovery,polymer and its structure.Although the ... |
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| Keywords: | PP Cold Compression Upsetting Deformation Recovery Plasticity-like Behavior |
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