| Prediction of long-term creep behavior and lifetime of PPC pipe materials by linear extrapolation |
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| 作者姓名： | 胡立江 刘志刚 |
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| 作者单位： | Dept. of Applied Chemistry，Harbin Institute of Technology，Harbin 150001，China |
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| 基金项目： | SponsoredbyDepartmentofScience&TechnologyofHLJProvince. |
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| 摘 要： | 0 ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｔｗｏｍａｉｎｔｅｃｈｎｉｑｕｅｓｔｏｐｒｅｄｉｃｔｔｈｅｌｏｎｇ ｔｅｒｍｍｅｃｈａｎｉｃａｌｂｅｈａｖｉｏｒｓａｎｄｌｉｆｅｔｉｍｅｆｏｒｐｏｌｙｍｅｒｉｃｍａｔｅｒｉａｌｓａｒｅｔｉｍｅ ｔｅｍｐｅｒａｔｕｒｅａｎｄｓｔｒｅｓｓ ｔｉｍｅｓｕｐｅｒｐｏｓｉｔｉｏｎ .Ｂｏｔｈｅｘｐｌｏｉｔｔｈｅｆａｃｔｔｈａｔｃｒｅｅｐｏｒｒｅｌａｘａｔｉｏｎｒａｔｅｓｉｎｃｒｅａｓｅｗｉｔｈｉｎｃｒｅａｓｉｎｇｔｅｍｐｅｒａｔｕｒｅａｎｄｓｔｒｅｓｓ.Ｔｈｅｉｒｃｏｍｍｏｎｄ…
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Prediction of long-term creep behavior and lifetime of PPC pipe materials by linear extrapolation |
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| HU Li-jiang,LIU Zhi-gang.Prediction of long-term creep behavior and lifetime of PPC pipe materials by linear extrapolation[J].Journal of Harbin Institute of Technology,2002,9(2). |
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| Authors: | HU Li-jiang LIU Zhi-gang |
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| Abstract: | The universal creep equation relates creep behavior(ε/εo)to aging time(ta),coefficient of retardation time(β),and intrinsic time(to).The relation was used to treat the creep experimental data for pipe specimens of polypropylene block copelymer(PPC),which were aged for different days(short-term)and tested under different stress levels at a certain temperature.Then unified master lines were constructed with the treated data and curves according to the universal equation.The master straight lines can be used for extrapolation to predict the long-term creep behavior and lifetime of the pipe materials of PPC in the same way as plate materials. |
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| Keywords: | polypropylene block copolymer (PPC) prediction creep lifetime universal function united master line |
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