Temperature dependence of elastic constants in unidirectional carbon fiber reinforced shape memory polymer composites

Abstract

The work describes a model to predict the elastic constants of unidirectional carbon fiber reinforced shape memory polymer composites (SMPCs) with different fiber volume fractions within the temperature range of 293 K to 393 K. The model is based on a theoretical description of the phase transition of the shape memory polymer (SMP). Two glassy phase volume fraction functions are developed, one based on the Eyring equation, the other based on the normal distribution equation. The longitudinal and transverse moduli, axial and transverse shear moduli, and axial Poisson's ratio are derived by using the glassy phase volume fraction function and modified rule of mixture. The axial Poisson's ratio increases with the temperature increase, while the other four constants decrease nonlinearly with rising temperatures. An inverse identification of the elastic constants at different temperature via numerical and experimental modal analysis from a flat SMPC laminate shows that the model proposed is adequate to describe the temperature 2 dependence of the elastic constants of the laminate.

Design, fabrication and experimental verification of a drag sail based on thermal-driven controllable bi-stable shape memory polymer composite booms

“…The mesh size is 2.5 mm, and the total number of elements is 20 352. The main parameters [30] used in the simulation are listed in table 3. The properties of SMPC are the values at its glass transition temperature of 100 • C.…”

Evolution of electrical conductivity in semi‐interpenetrating polymer network of shape memory polyvinyl chloride and polyaniline

“…Most of the reported electrically conductive SMPs are fabricated by those conventional composite techniques 31–33 . As well documented in the literature, the electrical conductivity of those conductive SMPs not only changes in the shape memory process, but also deteriorates upon shape memory cycling 34–36 . Thus, a kind of self‐repairing mechanism is required to keep their electrical conductivity 37,38 …”

“…[31][32][33] As well documented in the literature, the electrical conductivity of those conductive SMPs not only changes in the shape memory process, but also deteriorates upon shape memory cycling. [34][35][36] Thus, a kind of self-repairing mechanism is required to keep their electrical conductivity. 37,38 The purpose of this paper is twofold.…”

A 3D Anisotropic Thermomechanical Model for Thermally Induced Woven-Fabric-Reinforced Shape Memory Polymer Composites

“…Gu et al [ 29 ] developed a finite strain viscoelastic model for unidirectional, continuous, fiber-reinforced SMPCs with internal state variables and considered the anisotropic thermal properties of SMPCs using a mesomechanics-based method. Li et al [ 30 ] developed a thermomechanical model to describe the temperature-dependent elastic constants of unidirectional carbon-fiber-reinforced SMPCs with various fiber volume fractions based on the phase transition theory. Wang et al [ 31 ] developed a constitutive model for unidirectional carbon-fiber-reinforced SMPCs that accounted for interfacial bonding strength.…”