7 research outputs found
The Effects of Triggering Mechanisms on the Energy Absorption Capability of Circular Jute/Epoxy Composite Tubes under Quasi-Static Axial Loading
The usage of composite materials have been improving over the years due to its
superior mechanical properties such as high tensile strength, high energy absorption capability,
and corrosion resistance. In this present study, the energy absorption capability of circular jute/
epoxy composite tubes were tested and evaluated. To induce the progressive crushing of the
composite tubes, four different types of triggering mechanisms were used which were the nontrigger, single chamfered trigger, double chamfered trigger and tulip trigger. Quasi-static axial
loading test was carried out to understand the deformation patterns and the load-displacement
characteristics for each composite tube. Besides that, the influence of energy absorption, crush
force efficiency, peak load, mean load and load-displacement history were examined and
discussed. The primary results displayed a significant influence on the energy absorption
capability provided that stable progressive crushing occurred mostly in the triggered tubes
compared to the non-triggered tubes. Overall, the tulip trigger configuration attributed the
highest energy absorptio
Numerical simulation and experimental verification of hollow and foam-filled flax-fabric-reinforced epoxy tubular energy absorbers subjected to crashing
Numerical methods for simulating hollow and foam-filled flax-fabric-reinforced epoxy tubular energy absorbers subjected to lateral crashing are presented. The crashing characteristics, such as the progressive failure, load–displacement response, absorbed energy, peak load, and failure modes, of the tubes were simulated and calculated numerically. A 3D nonlinear finite-element model that allows for the plasticity of materials using an isotropic hardening model with strain rate dependence and failureis proposed. An explicit finite-element solver is used to address the lateral crashing of the tubes considering large displacements and strains, plasticity, and damage. The experimental nonlinear crashing load vs. displacement data are successfully described by using the finite-element model proposed. The simulated peak loads and absorbed energy of the tubes are also in good agreement with experimental results