Finite element analysis of viscoelastic laminates embedded with shape-memory-alloy wires under low-velocity impact considering large deflection. (May 2021)

• Record Type: Journal Article
• Authors: Shokrgozar, Mohammadreza; Tizfahm, Akbar; Mozaffari, Ali
• Is Part Of: Mechanics of materials. Volume 156(2021)
• Publication Date: 2021-05
• Subjects: Composite laminates -- Shape memory alloys -- Viscoelasticity -- Large deflection; Strength of materials -- Periodicals; Mechanics, Applied -- Periodicals; Résistance des matériaux -- Périodiques; Mécanique appliquée -- Périodiques; Mechanics, Applied; Strength of materials; Periodicals; Electronic journals; 620.11
• DOI: 10.1016/j.mechmat.2021.103810
• Languages: English
• ISSNs: 0167-6636

Abstract

Abstract: This paper presents an experimentally validated finite element analysis of the low-velocity impact on viscoelastic laminates embedded with shape memory alloy (SMA) with consideration of large deflection effects. Substantial impact outputs, including contact force and deflection distribution, are then derived and a fully implicit numerical solution is utilized. The finite element model contains the following innovative items to develop more sophisticated results: (1) A user-defined (UMAT) is prepared in ABAQUS to simulate the viscoelasticity of composite laminate and superelasticity of SMA wires simultaneously. (2) The generalized Maxwell model consisting of 3 Mx elements is utilized for the viscoelastic feature of the composite laminate. (3) A modified phenomenological constitutive law, which is capable of modeling superelasticity and one-way shape memory effect, is used for SMA wires. (4) Large deflection effects on dynamical response are investigated for both conventional and SMA-reinforced composites. Many researchers have not regarded viscoelasticity in their calculation (especially polymeric composites), although the results show that the viscoelastic feature of laminates has a pronounced effect on the dynamical response of composite laminates embedded with SMA wires. It is also shown that large deflection effects have a significant influence on the results of SMA-reinforced composites. This model achieved good conformance with experimental results. Highlights: Low-velocity impact on viscoelastic laminates embedded with shape memory alloy (SMA) with consideration of large deflection effects. Increase the contact force and decrease contact time and deflection by considering viscoelasticity in the low-velocity impact analysis. Less amount of austenite is transformed into the martensite, hence, the hysteresis stress-strain loops became smaller. This FE model is capable of modeling viscoelasticity (Wiechert model), shape-memory effect, and superelasticity altogether. Nonlinear geometry affects the dynamic results; in linear case, the peak of contact force decreases and the contact time and deflection increase. The stress-strain hysteresis loops are larger in the linear geometry cases; Then, the volume fraction of the martensite phase is greater.