Thermal and thermo-mechanical solution of laminated composite beam based on a variables separation for arbitrary volume heat source locations

Abstract

In this work, a method to compute explicit thermal solutions for laminated and sandwich beams with arbitrary heat source location is developed. The temperature is written as a sum of separated functions of the axial coordinate x , the transverse coordinate z and the volumetric heat source location x 0. The derived non-linear problem implies an iterative process in which three 1D problems are solved successively at each iteration. In the thickness direction, a fourth-order expansion in each layer is considered. For the axial description, classical Finite Element method is used. The presented approach is assessed on various laminated and sandwich beams and comparisons with reference solutions with a fixed heat source location are proposed. Based on the accurate results of the thermal analysis, thermo-mechanical response is also addressed using also a separated representation.

Fiber Orientation and Fillers Effects on Specific Heat of Fabric Reinforced Hybrid Epoxy Composites

“…So, the temperature increasing or decreasing leads to volume deformation of the composite materials, which affects the structural stability. Thus, the thermal investigations of the composite materials are important, because their mechanical performance depends on their thermal deformations [1].…”

An Experimental Investigation of Thermal Properties of Fabric Reinforced Epoxy Composites

“…In order to select a composite material for a specific application, besides mechanical properties there are taken into account the thermal properties as thermal conductivity, specific heat and linear expansion coefficient, if the intended application involves the use of material during service time at high or low temperature or at temperature value variations. The mechanical resistance of the materials depends on thermal deformation [1][2][3], because the ductility of a material increases with the temperature increasing and its fragility increases with the temperature decreasing. In order to analyze the thermomechanical behavior of a material, it is investigated its linear expansion coefficient due to changing of the volume and dimensions with the temperature variation, which can affect the structural stability.…”