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OALib Journal期刊
ISSN: 2333-9721
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应力对fecrmocu合金阻尼性能的影响
Keywords: 金属材料,fecrmocu,阻尼合金,abaqus,应力,动态力学分析仪
Abstract:
？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。
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