Damping of Ni-Mn-Ga epoxy resin composites

• Published in: Chinese journal of aeronautics 2013-12, Vol.26 (6), p.1596-1605
• Main Authors: Wei, Liang, Yu, He, Yufeng, Liu, Naibin, Yang
• Format: Article
• Language: English
• Subjects: Acoustic emission; Ferromagnetic material; Material damping; Ni–Mn–Ga resin matrix composite; Structural damping ratio; 声发射信号; 复合材料制备; 环氧树脂复合材料; 结构阻尼; 铁磁形状记忆合金; 锰; 镍; 镓
• ISSN: 1000-9361
• DOI: 10.1016/j.cja.2013.10.005

By combining the advantages of effcient damping and high mechanical properties,Ni-Mn-Ga particle composites have a very good prospect for applications in damping structure design.In this paper,a ferromagnetic shape memory alloy Ni-Mn-Ga composite is prepared.Ni-Mn-Ga particle/bisphenol-A epoxy composite cantilever beam vibration tests under a magnetic feld and without the magnetic feld are conducted to analyze the structural damping ratios n.Meanwhile,the damping characteristics of the Ni-Mn-Ga composite are studied through the axial loading-unloading method and the acoustic emission signals method.The damping coeffcient of the composite for different Ni-Mn-Ga volume fractions is obtained.The interface properties of the composite are discussed by micro examination and axial loading.The relationships between the damping of the composite and that of the component materials are discussed.The specifc damping capacity（SDC）and acoustic emission counts diagram of different specimens with different Ni-Mn-Ga volume fractions are analyzed.