| 拉压弹性模量不等材料杆的纯弯曲及偏心压缩 |
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| 引用本文： | 吴莹,赵永刚,李世荣.拉压弹性模量不等材料杆的纯弯曲及偏心压缩[J].兰州理工大学学报,2001,27(1):101-105. |
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| 作者姓名： | 吴莹 赵永刚 李世荣 |
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| 作者单位： | 甘肃工业大学基础科学系, |
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| 摘 要： | 基于弹性力学的基本理论 ,分析了拉压弹性模量不等材料直杆在纯弯曲变形状态下的应力和应变 ,给出相应的应力计算公式 ,并讨论了拉压弹性模量的比值参数对应力分布的影响 .在此基础上又分析了拉压弹性模量不等材料杆在偏心压缩时的应力、应变 ,给出了横截面中性轴位置的数值计算方法和数值解 ,并进行了定性的讨论 .
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| 关 键 词： | 弹性模量 纯弯曲 偏心压缩 截面中性轴 杆 |
| 文章编号： | 1000-5889（2001）01-0101-05 |
| 修稿时间： | 2000年4月6日 |
Pure bend and excentrical compression of rod made of material with nonidentical elastic modulus of tension and compression |
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| WU Ying,ZHAO Yong-gang,LI Shi-rong.Pure bend and excentrical compression of rod made of material with nonidentical elastic modulus of tension and compression[J].Journal of Lanzhou University of Technology,2001,27(1):101-105. |
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| Authors: | WU Ying ZHAO Yong-gang LI Shi-rong |
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| Abstract: | The stress and strain of straight rod of material with nonidentical elastic modulus of tension and compression under the condition of pure bending deformation are analysed, according to the principle of elastic mechanics, corresponding formula for stress evaluation is given, and the effect of the ration of elastic modulus of tension to that of compression on the stress distribution is also discussed. Based on this, the stress and strain state of excentrically compressed rod with the same material is also analysed, a numeric evaluation algorithm as well as numeric solution of the position of cross-sectional neutral axis are given, and qualitative discussion is then performed. |
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| Keywords: | elastic modulus pure bend excentrical compression cross-sectional neutral axis rod |
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