Experimental and Numerical Failure Analysis of Adhesive Joint of Glass Fiber Reinforced Polymer Composite

Abstract

The adhesive joint is the most widely used joining technique of thermoset composite structures. Analysis of the failure of adhesive joints of composite structures has a high importance due to its significance in industrial applications such as automobile or autobus bodies. In this paper we performed experimental and numerical analysis of a glass fiber reinforced, vinyl-ester matrix composite bonded with a methacrylate adhesive. The critical energy release rate in normal loading direction obtained from standard double cantilever beam test is used as input data in finite element simulations, in which the failure process is modeled by using cohesive zone material. Results of interface elements with exponential and standard contact elements with bilinear cohesive behavior are compared. The use of interface elements is numerically robust, convergence is reached faster, but identical mesh between the parts is needed. It can be a good alternative when simulating sub-models. When using standard contact elements, the robustness needs contact stabilization, however this method does not need identical mesh and it also allows the use of shell elements, therefore it can be used on a full-structure scale with high efficiency.

Axisymmetric Stress State of Adhesive Joint of a Circular Patch with a Plate Weakened by a Circular Cut-out

“…The patch can have an octagonal [1], circular [2], and rectangular [3] form. In addition to numerical simulation, experimental studies of joints [4] and reinforced plates for strength [5] are also carried out.…”

Comparison of the accuracy of analytical models for basalt fiber–reinforced poly(lactic acid) composites prepared by injection molding and fused filament fabrication

“…The demand for high-performance, recyclable structural components has promoted the development of thermoplastic composite technologies. Thermoplastic polymers offer the advantages of recyclability, easy joining methods [1], and the possibility to produce multi-functional and smart materials [2], and short fibers are often used as reinforcement to improve their strength and stiffness [3,4]. In most cases, short fiber-reinforced composites (SFCs) are processed by injection molding (IM).…”

Nonlinear fiber-bundle-cells-based phenomenological modeling of human tissue samples

“…Most human and animal tissues (e.g., tendon, muscle, bone, nerve, vein/artery, and skin or pellicle tissues) have a fibrous structure (Moore 1999 ; Neumann et al 2019 ). Similar to artificial fibrous materials, such as textiles or fiber-reinforced composites (Bovier 2012 ; Fondrk et al 1988 ; Gibson 2016 ; Hull 1996 ; Kollar 2003 ; Kovács and Romhány 2018 ; Takács and Szabó 2020 ; Vardai et al 2019 ; Yin 2018 ), they are usually examined by using continuum phenomenological models (Fondrk et al 1988 ; Nordin 2022 ; Pollintine et al 2009 ) like the anisotropic linear elastic approach for hard materials and the isotropic Neo-Hookean and the anisotropic Fung and Holzapfel–Gasser–Ogden's (HGO) hyper-elastic models for soft materials (Huh et al 2019 ; Sun and Sacks 2005 ). The mechanical features of fibrous materials, however, strongly depend on the statistical geometrical and mechanical properties of the building elements like fibrils, fibers, and bundles of them such as macro-fibrils, yarns or rovings, as well as on the connection between the fibers and their environment.…”