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An approach to evaluate the impact damage initiation and propagation in composite plates is investigated. It is shown that the main characters of impact damage can be predicted by introducing both threshold strength and propagation strength for matrix cracking. The threshold strength controls...
Fibre-reinforced plastic (FRP) materials have been recognised as new innovative materials for concrete rehabilitation and retrofit. Since concrete is poor in tension, a beam without any form of reinforcement will fail when subjected to a relatively small tensile load. Therefore, the use of the...
In this paper we consider stiffness properties of square symmetric unidirectional two-phase composites with given volume fractions. First, we compare the effective moduli of the stiffest possible (or softest possible) of such materials which satisfy transverse isotropy or square isotropy with...
We consider some computational aspects of effective properties for some multi-scale structures. In particular, we discuss iterated square honeycombs and another type of square honeycombs containing up to 4000 small discs randomly distributed inside each square. We present some numerical methods...
The paper proposes a cohesive layer model to track the propagation of delamination in composites. The primary motivation for this development is to automate and accelerate the computation in 3-D problems where the rates of delamination growth in different directions are unknown a priori and in...
In this study, an E-glass fiber reinforced epoxy composite laminate is subjected to ultraviolet radiation (UV) for up to 48 h. The intensity of the UV radiation is 1.5 J/cm 2 /min. A total of 39 specimens are prepared and tested, in which three specimens are used as control and 36 specimens are...
This paper deals with an accurate higher-order theory employing finite element procedure for the free vibration analysis of multi-layered thick composite plates. The theory accounts for the realistic variation of in-plane and transverse displacements through the thickness. The accuracy of the...
Cyclic thermal stresses induced in MMC component were reproduced through an innovative test apparatus. The modification induced and the residual properties of the specimens were then investigated through mechanical tests and fractographic analysis. The behaviour showed by this material seems to...
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