Multi-scale finite element analyses on the thermal conductive behaviors of 3D braided composites

Abstract

The thermal conductive behaviors of 3D braided composites along in-plane and out-of-plane directions were characterized and analyzed by multi-scale finite element analyses (FEA) and also validated by experimental. Micro-scale representative volume element (RVE) was used to calculate the thermal conductivities of braiding yarns, and the meso-scale RVE and full-scale braided model were developed to research the thermal conductive behaviors of the whole braided composites. The differences of the two models are also analyzed in this paper. Another attention of this paper was focused on revealing the thermal conductive structural effects of braided composites. It is found that the thermal conductivities along out-of-plane direction are larger than that of in-plane direction. The temperature distribution and heat flux transmission are mainly along fiber orientation direction. With the increment of temperature, the thermal conductivities of the braided composites are increased. As the existence of surface and corner regions, the thermal conductivities calculated from full-scale model are closer to experimental by comparison with meso-scale RVE. In addition, the temperatures in interior regions are slightly higher than those in surface and corner regions of the braided composites.

A mesoscale study of thermal expansion behaviors of epoxy resin and carbon fiber/epoxy unidirectional composites based on periodic temperature and displacement boundary conditions

“…Therefore, the average values of DSC curves combining with those of reference sapphire specimens were used to calculate the specific heat capacity of cured epoxy resin at different temperatures. In this study the measured heat capacity for neat cured epoxy resin at room temperature is 1248 J kg -1 K -1 which is consistent to previously reported values, 1200 J kg -1 K -1 in references [54,57].…”

“…Based on the periodic displacement boundary conditions described above, Dong et al [54] developed the periodic temperature boundary conditions, also according to the master and slave nodes technique. The equations for establishing temperature PBCs are summarized in the following:…”

Fiber/Fabric‐Based Piezoelectric and Triboelectric Nanogenerators for Flexible/Stretchable and Wearable Electronics and Artificial Intelligence

“…With the properties of excellent resilience, structure lighter, heat and moisture permeability, the 3DWKS is widely used in insole, mattress, automobile seat, and pressure sensors . 3D braided fabric composed of mutual yarns intertwining can be obtained by introducing longitudinal (axial)‐oriented yarns into its structure . Based on the number of oriented braider yarns, 3D braided fabric can be classified into four directional and five directional structures.…”

XFEM Damage Analysis of Carbon Fiber Reinforced Composites and Crack Propagation in Mixed-Mode and Implementation of the Method Using ABAQUS

“…A summary of anisotropic material models established for reinforced fiber composites are present in various research studies. The experimental validation needs to be done through such models and study of the behaviour into finite element analysis, whereas, layered composites in micro to macro scale shift are mostly done by different techniques such as meso FE analysis of textile composites [25], [26]. One of the examples [18] is shown in Fig.…”

“…Carbon fibre reinforce polymer (CFRP) composites have been commonly used in aerospace, shipbuilding and automobile engineering for several decades. Recently, the application of CFRP is increased in the constructional industry [24], [25] and manufacture of sports instruments [15], etc. It is still challenging to fully understand the complex damage mechanism of fibre composites.…”