On the Damage Behavior of Fiber Reinforced Composite Materials

Abstract

Since fiber reinforced composite materials have been used in main parts of structures, an accurate evaluation of their mechanical characteristics becomes very important. Due to their anisotropic nature and complicated architecture, it is very difficult to reveal the damage mechanism of these materials from the results of mechanical tests. Therefore, there is always a big need to conduct reliable simulations and analytical evaluations. In this paper, the damage behavior of FRP is simulated by finite element analysis using an anisotropic damage model based on damage mechanics. The proposed procedure is applied to two examples; the finite element analysis aided AE damage simulation and the finite element analysis of microscopic damage propagation in woven fabric composite materials. Experimental tests in both cases have been conducted to evaluate the validity of the proposed method. It is recognized that there is a good agreement between the analytical and experimental results, and that the proposed simulation method is very useful for the evaluation of damage mechanism.

Local damage in a 5-harness satin weave composite under static tension: Part II – Meso-FE modelling

“…Table 6. The characteristics of anisotropic damage model for fiber bundle and isotropic damage model for matrix [27]. Table 7.…”

“…However, this criterion cannot indicate the type of damage mode in the yarns, where the architecture of the fibre arrangement plays an important role. The modes of the damage are classified into four different types (Table 6) [27]. The mode represents the fibre breaking, L T and Z modes represent the transverse and shear cracking.…”

Palliatives for Low Velocity Impact Damage in Composite Laminates

“…It has been identified that there are at least three dominant failure mechanisms taking place in the composite laminates when subjected to impact loading. These are interlaminar fracture (or delamination), matrix cracking due to transverse shear, fibre-matrix debonding, and translaminar (fibre) fracture [38][39][40][41][42][43][44]. The first two mechanisms are sensitive to the properties of the matrix materials and the last to the fibre performance, especially the failure strain.…”

Qualitative Failure Analysis on Laminate Structures Using Comprehensive Analytical Linear Elastic Contact Modelling

“…From equations (1) and (4) the complete elastic field at any point within the loaded laminate structure can be evaluated applying the formulae (8) to (11). For more information the reader is referred to the original works of Schwarzer [35], Fabrikant [37] and Stone [31].…”