| 低应力振幅下非线性滞弹性内耗峰(P′1峰)的数值分析 |
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| 引用本文： | 方前锋.低应力振幅下非线性滞弹性内耗峰(P′1峰)的数值分析[J].物理学报,1997,46(3):536-543. |
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| 作者姓名： | 方前锋 |
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| 作者单位： | 中国科学院固体物理研究所内耗与固体缺陷开放研究实验室 |
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| 基金项目： | 国家自然科学基金资助的课题. |
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| 摘 要： | 通过差分方法，对在位错弯结气团模型的基础上推导出来的溶质原子在位错芯区内的纵向扩散方程，进行了数值求解，由此计算出了与P′1峰相应的内耗和横量亏损随温度和振幅的变化曲线．数值计算得到的内耗曲线与以前的实验曲线，无论在外观形态上，还是在移动规律上，都完全一样．这样就从定量上解释了P′1峰
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| 关 键 词： | 低应力 非线性 滞弹性 固体 内耗峰 |
| 收稿时间： | 1996-06-27 |
NUMERICAL ANALYSIS OF THE NONLINEAR ANELASTIC INTERNAL FRICTION PEAK (P′1 PEAK) UNDERLOW STRESS AMPLITUDE |
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| FANG QIAN-FENG.NUMERICAL ANALYSIS OF THE NONLINEAR ANELASTIC INTERNAL FRICTION PEAK (P′1 PEAK) UNDERLOW STRESS AMPLITUDE[J].Acta Physica Sinica,1997,46(3):536-543. |
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| Authors: | FANG QIAN-FENG |
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| Abstract: | The longitudinal diffusion equation of the solute atom along dislocation core for P′1 peak is numerically solved and the P′1 peak is derived on the base of dislocation kink atmosphere model. The variation of internal friction and modulus defects with temperature and strain amplitude is calculated. The theoretical and experimental results are compared and found to be in consistence with each other. Therefore, the P′1 peak can be quantitatively explained. |
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