Research on the thermal vibration characteristics of SMA laying configuration on patch repair laminates

doi:10.19936/j.cnki.2096-8000.20241028.008

Abstract

Abstract: Fiber reinforced materials made of shape memory alloys embedded in composite materials have the advantages of high strength and self-repair, which can significantly improve the rigidity and peel resistance of the repair structure. Based on the first-order shear deformation theory (FSDT) and Hamilton’s principle, the constitutive equation and vibration control equation of SMA composites are derived. The single-sided repair laminate model of SMA patch embedded with multiple laying configurations was established by ABAQUS software, and the influence of SMA laying configuration on the vibration characteristics of repair glass fiber laminate at different temperatures was explored through numerical simulation and experimental verification. The results show that compared with the single-line type (D) and vertical cross type (C), the first three mode shapes of the diagonal cross type (X) SMA repair plate are closer to the traditional repair plate (Q₀), and the overall stiffness and peel resistance of the repair structure are the best. The natural frequency drop rate of the repair board of the four configurations under the action of high temperature has the following relationship: Q₀>D₆>C₆>X₆, that is, the SMA embedded with different laying methods can reduce the influence of temperature on the natural frequency to varying degrees, of which the X₆-type has the lowest drop rate, up to 1.24%. The number of SMA laying has the following relationship with IQR value and natural frequency decline rate: 6>12>24, with the increase of the number of SMA embedded in the board, the influence of thermal effect on the natural frequency decreases, and the thermal stability and repair effect of X₂₄ repair structure are the best. The high-order natural frequencies of SMA repair boards are more sensitive to temperature and more susceptible to temperature changes in their natural frequencies.

Key words: cross-weave fiberglass composite, shape memory alloy, single-sided patch repair, vibration characteristics, thermal environment

CLC Number:

TB332

CUI Kaixin, LU Xiang, XIE Haohang, LIU Xinglong. Research on the thermal vibration characteristics of SMA laying configuration on patch repair laminates[J]. COMPOSITES SCIENCE AND ENGINEERING, 2024, 0(10): 53-64.

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