应力对FeCrMoCu合金阻尼性能的影响

材料研究学报

2013, Vol. 27

Issue (3): 225-230

研究论文

本期目录 | 过刊浏览

应力对FeCrMoCu合金阻尼性能的影响

胡小锋, 刘树伟, 李秀艳, 戎利建

(中国科学院金属研究所沈阳 110016)

Influence of Stress on Damping Behavior of FeCrMoCu Alloy

HU Xiaofeng^* LIU Shuwei LI Xiuyan RONG Lijian

(Institute of Metal Research, Chinese Academy of Science, Shenyang 110016)

引用本文:

胡小锋,刘树伟,李秀艳,戎利建. 应力对FeCrMoCu合金阻尼性能的影响[J]. 材料研究学报, 2013, 27(3): 225-230.
HU Xiaofeng, LIU Shuwei, LI Xiuyan, RONG Lijian. Influence of Stress on Damping Behavior of FeCrMoCu Alloy[J]. Chinese Journal of Materials Research, 2013, 27(3): 225-230.

全文: PDF(3842 KB)

摘要:

用动态力学分析仪(DMA)的三点弯和双悬臂方法测量FeCrMoCu合金的阻尼性能, 通过ABAQUS有限元模拟分析测量过程中试样的应力分布, 研究了应力对FeCrMoCu合金阻尼行为的影响。结果表明: 测量阻尼时预载荷使样品产生应力集中, 使样品的磁畴壁发生移动从而降低了合金的阻尼性能。应力越大磁畴的可动性越低, 对合金阻尼性能的影响也越大。应力的加载方式也对FeCrMoCu合金阻尼性能有较大的影响, 预载荷使双悬臂模式下样品上下表面都受到压应力, 因此需要较大的应力才能使样品的磁畴结构达到饱和。其结果是对应的应变振幅较大, 测得的最大阻尼性能偏低。而三点弯测试时, 由于上下表面分别受到压应力和拉应力, 应力的叠加使合金磁畴达到饱和的应变振幅较小, 测得的较大。

关键词 ：金属材料, FeCrMoCu, 阻尼合金, ABAQUS, 应力, 动态力学分析仪

Abstract：

Three point bending and dual cantilever model of dynamic mechanical analyzer (DMA) were used to measure the damping capacity of FeCrMoCu alloy, and ABAQUS software was selected to analysis the stress distribution of sample during damping test. The influence of stress on damping behavior of FeCrMoCu alloy was studied. The results show that there obviously exists stress concentration due to pre- load during damping test, which will cause the move of magnetic domain wall. With increasing stress, the mobility of domain wall will be lowered and the damping capacity of FeCrMoCu alloy decreases obviously. There is obvious influence of stress loading mode on damping behavior of FeCrMoCu alloy. For dual cantilever model, there always exists compressive stress at the upper and lower surface of test sample and a greater stress is needed to saturate domain structure. Therefore, the strain amplitudeεmax is bigger and the maximum damping capacity Q^-1_max is lower. While 3 point bending model was used to test damping capacity, in the upper and lower surface of sample there exist compressive stress and tensile stress respectively. During damping test, the imposed stress will lead to overlay effect. The magnetic domain structure will saturate at lower strain amplitude ε_max and the maximum damping capacity Q^-1_max is higher.

Key words： metallic materials FeCrMoCu damping alloy ABAQUS stress dynamic mechanical analyzer (DMA)

收稿日期: 2013-02-27

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