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Flexural and free vibration control of smart epoxy composite beams using shape memory alloy wires actuator
Journal of Intelligent Material Systems and Structures ( IF 2.7 ) Pub Date : 2020-06-01 , DOI: 10.1177/1045389x20922899
Mohsen Gol Zardian 1 , Navid Moslemi 1 , Farzin Mozafari 2 , Soheil Gohari 3 , Mohd Yazid Yahya 1 , Colin Burvill 3 , Amran Ayob 1
Affiliation  

Shape memory alloys are increasingly used in numerous smart engineering structures. This study experimentally investigates static flexural and free vibration characteristics of composite beams reinforced with shape memory alloy wires. The key to this study is using shape memory alloy fibers as a means for influencing and tuning the static and dynamic responses of structures. A series of static three-point bending and modal experiments is performed to capture the capability of shape memory alloy wires in controlling the static and dynamic responses of a reinforced beam. Static and dynamic behaviors of the fiber-reinforced beam with different volumetric fiber fractions are examined. Before heat excitation, increasing the number of shape memory alloy wires leads to higher beam stiffness and lower beam deflection. However, with both heat activation and the higher number of shape memory alloy wires, beam deflection is significantly reduced. The modal vibration tests demonstrated that when shape memory alloy wires are not activated, the magnitude of natural frequencies slightly decreases by increasing the number of shape memory alloy wires. However, with heat excitation, the higher number of shape memory alloy wires, in contrast, increases the magnitude of natural frequencies. Furthermore, the higher number of activated shape memory alloy wires shows to predominantly increase the magnitude of higher modes of vibration rather than lower modes.

中文翻译:

使用形状记忆合金线致动器控制智能环氧树脂复合梁的弯曲和自由振动

形状记忆合金越来越多地用于众多智能工程结构中。本研究通过实验研究了形状记忆合金丝增强复合梁的静态弯曲和自由振动特性。这项研究的关键是使用形状记忆合金纤维作为影响和调整结构静态和动态响应的手段。进行了一系列静态三点弯曲和模态实验,以捕捉形状记忆合金线在控制加固梁的静态和动态响应方面的能力。研究了具有不同体积纤维分数的纤维增强梁的静态和动态行为。在热激发之前,增加形状记忆合金线的数量会导致更高的梁刚度和更低的梁挠度。然而,通过热激活和更多数量的形状记忆合金线,梁偏转显着减少。模态振动试验表明,当形状记忆合金丝未激活时,通过增加形状记忆合金丝的数量,固有频率的幅值略有下降。然而,在热激励下,形状记忆合金线的数量越多,自然频率的幅度越大。此外,更多数量的活化形状记忆合金线显示出主要增加较高振动模式而不是较低模式的幅度。通过增加形状记忆合金丝的数量,自然频率的大小略有下降。然而,在热激励下,形状记忆合金线的数量越多,自然频率的幅度越大。此外,更多数量的活化形状记忆合金线显示出主要增加较高振动模式而不是较低模式的幅度。通过增加形状记忆合金丝的数量,自然频率的大小略有下降。然而,在热激励下,形状记忆合金线的数量越多,自然频率的幅度越大。此外,更多数量的活化形状记忆合金线显示出主要增加较高振动模式而不是较低模式的幅度。
更新日期:2020-06-01
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