Investigation Of Energy Absorption Of A GFRP
Composite Crash Box
Author(s)
H. Ghasemnejad, H. Hadavinia & A. Aboutorabi
Abstract
Interlaminar fracture toughness of composite materials plays an important role
on the specific energy absorption (SEA) of the crushing of composite materials.
In this regard an optimum composite crash box design is sought by studying the
effect of fibre orientation and stacking sequence on the increase of interlaminar
fracture toughness. In order to achieve this, various glass fibre/epoxy
orientations were studied experimentally. Double Cantilever Beam (DCB) and
axial crush box specimens were made and tested in a quasi-static condition to
determine the interlaminar fracture toughness (GIC) and SEA values for each set
of fibre orientation and stacking sequence. The effect of the stacking sequence
on fracture toughness and the SEA of the GFRP composite crash box has been
quantified and optimum results were obtained.
Keywords: interlaminar fracture toughness, specific energy absorption, fibre
orientation, stacking sequence, composite.
1 Introduction
The high energy absorbing capabilities of fibre reinforced polymer composite
(FRP) materials is one of the main factors in their application in automotive and
aerospace structures, while they also provide other functional and economical
benefits such as enhanced strength, durability, weight reduction and lower fuel
consumption. For structural vehicle crashworthiness, FRP composites are able to
collapse in progressive a controlled manner, which results in high specific
energy absorption in the event of an unexpected crash. Unlike metals and
polymers, the progressive energy absorption of composite structures is
dominated by extensive micro-fracture instead of plastic deformation [1–3].
Various fracture mechanisms such as fibre breakage and buckling, matrix
Keywords
interlaminar fracture toughness, specific energy absorption, fibre
orientation, stacking sequence, composite.
Related Book
Other papers in this volume
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