A novel test configuration has been developed to induce combined stress-states of in-plane longitudinal tension and transverse compression in thin-ply, unidirectional (UD) composite layers. Three different multi-directional laminates have designed incorporating UD carbon/epoxy plies embedded angle-ply blocks the same material. The scissoring deformation induces central layers when is strained 0...

This paper investigates the effect of transverse impact loading on in-plane shear behaviour two laminate configurations. The extensive experimental studies consider a pure carbon (type 1) and novel X-shaped carbon/glass 2). results establish that all three graduated energy levels (5J, 7.5J 10J) induce through-thickness matrix cracking, fibre breakage delamination in type 1 laminate. However, us...

This paper describes the optimization of a composite laminate made from two materials. The use of two materials in the laminates design can offer improved designs, as it is possible to combine the desirable properties of the two materials. In this paper, we consider the use of graphite-epoxy, which has high stiffness properties, but is expensive, and glass-epoxy, which is not as stiff, but has ...

High-pressure laminates (HPLs) are durable, resistant to environmental effects and good cost-benefit decorative surface composite materials with special properties tailored to meet market demand. In the present work, polyhexamethylene biguanide (PHMB) was incorporated for the first time into melamine-formaldehyde resin (MF) matrix on the outer layer of HPLs to provide them antimicrobial propert...

.ABSTRACT: This paper discusses the material characterization of wide flange pultruded structural shapes (E-glass, Vinylester). The material was subjected to three loading conditions: tension, shear, and bending. Coupon samples were obtained from web and flanges of the I-section for tension and shear tests. Tensile properties were obtained from rectangular coupons with end tabs loaded in tensio...

Pre-stressed piezoelectric laminates, consisting of one or more metal layers and a piezoelectric material bonded together with an adhesive, have been widely studied over the past few years, both numerically and experimentally. Most of the current research has concentrated on the effect of the metal layers, types and geometry, along with variations in the active layer of the laminate. Historical...

An efŽ cient method has been developed for analyzing the three-dimensional electromechanical deformations of a monoclinic piezoelectric laminate subjected to surface tractions and electric displacements on the top and bottom surfaces. The procedure combines the transfer matrix method with the asymptotic expansion technique. The electromechanical coupled formulation is reduced to a hierarchy of ...

Abstract Firstly, three groups of fiber curve laminates with different numbers layers and angles were designed prepared. A cantilever plate free vibration test was used to analyze the influence angle on attenuation characteristics laminates. The contrast results show that has a significant effect loss factor laminate structure. When change ±<45|60>, reached maximum value, damping performa...