| 非对称循环载荷下疲劳寿命估算的能量法 |
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| 引用本文： | 冯建民,吴富民,肖寿庭.非对称循环载荷下疲劳寿命估算的能量法[J].航空学报,1996,17(6):107-111. |
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| 作者姓名： | 冯建民 吴富民 肖寿庭 |
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| 作者单位： | 飞机结构强度研究所，西北工业大学强度研究所 |
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| 摘 要： | 首先给出了材料静态σ－ε曲线更精确的拟合方法，然后提出一种能够对材料在非对称载荷作用下的响应进行定量分析预测的循环特性计算模型——双切线模型，最后用总应变能原理对疲劳寿命进行了估算。结果表明，计算寿命与试验数据符合得很好
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| 关 键 词： | 非对称循环载荷 应力－应变曲线 双切线模型 总应变能 疲劳寿命 |
ENERGY METHOD FOR FATIGUE LIFE ESTIMATION UNDER CYCLIC ASYMMETRICAL LOADING |
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| Feng Jianmin.ENERGY METHOD FOR FATIGUE LIFE ESTIMATION UNDER CYCLIC ASYMMETRICAL LOADING[J].Acta Aeronautica et Astronautica Sinica,1996,17(6):107-111. |
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| Authors: | Feng Jianmin |
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| Institution: | 1. Aircraft Structure Strength Research Institute, Xi'an, 710061;2. Strength Reseach Institute, Northwestern Polytechnical University , Xi'an, 710072 |
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| Abstract: | A more close fit model of the static σ ε curve is given at first. Then a new cyclic plastic model,two tangent model, is proposed. This model can analyze and calculate the response of the material to asymmetrical loading quantitatively. In the meantime, the total strain energy density theory is used to estimate the fatigue life. From the results, the calculated fatigue lives agree very well with the experimental data. |
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| Keywords: | cyclic asymmetrical loading stress strain curve two tangent model total strain energy density fatigue life |
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