| 用扭转试验研究淡水冰的剪切强度及模量 |
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| 引用本文： | 刘维波,李光伟,王鲁云.用扭转试验研究淡水冰的剪切强度及模量[J].大连理工大学学报,1999,39(1):31-33. |
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| 作者姓名： | 刘维波 李光伟 王鲁云 |
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| 作者单位： | 大连理工大学工程力学系，大连永泰电子技术服务有限公司 |
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| 摘 要： | 引用各向同性线弹性理论对淡水冰进行了扭转试验研究，测定了扭矩作用面平行于冰的晶柱方向；温度为２６３Ｋ，在不同的剪应变速率γ情况下，淡水冰的扭转强度极限τｂ及剪切弹性模量Ｇ．通过试验数据的分析，得到如下结论：在２６３Ｋ温度下，γ在０．０１２×１０－３～２．３００×１０－３ｓ－１范围内，冰的τｂ随γ的增加而略有降低，其平均值为０．７５６ＭＰａ，而Ｇ随γ的增加无明显增大，约成４５°的螺旋面破坏，如同铸铁试样扭转破坏断口一样．
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| 关 键 词： | 扭转试验 剪切强度 剪切弹性模量 冰 淡水冰 |
Investigation of shear strength and modulus of fresh water ice by torsional tests |
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| LIU\ Wei bo ,\ LI\ Guang wei ,\ WANG\ Lu yun . Dept. of Eng. Mechanics,Dalian Univ. of Technol.,Dalian ,China , . Dalian Yongtai Electron. Technol. Serv. Co.,Dalian ,China.Investigation of shear strength and modulus of fresh water ice by torsional tests[J].Journal of Dalian University of Technology,1999,39(1):31-33. |
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| Authors: | LIU\ Wei bo \ LI\ Guang wei \ WANG\ Lu yun Dept of Eng Mechanics Dalian Univ of Technol Dalian China Dalian Yongtai Electron Technol Serv Co Dalian China |
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| Institution: | LIU\ Wei bo 1,\ LI\ Guang wei 1,\ WANG\ Lu yun 2 1. Dept. of Eng. Mechanics,Dalian Univ. of Technol.,Dalian 116024,China , 2. Dalian Yongtai Electron. Technol. Serv. Co.,Dalian 116023,China |
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| Abstract: | ? In order to obtain pure shearing strength, modulus torsional test is better than direct shear test. However, shearing modulus can be obained only by torsional test. Based on a specially improved torsional equipment, the tests of pure shearing strength and modulus of fresh water ice were performed under temperature 263 K. The torsional moment is applied manually and measured by a torsional load cell. The acting plane of torsional moment is parallel to crystalline column of fresh water ice. |
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