The influence of high and low temperatures on the impact properties of glass-epoxy composites

Abstract

The aim of this paper is to present the influence of high and low temperatures on the impact properties glass-epoxy composites. The impact strength an is presented for four different glass-epoxy composite structures at three different temperatures, i.e., at room temperature t=20°C, at an elevated temperature t=+50°C and at a low temperature t=-50°C. Standard mechanical testing was carried out on the composite materials with specific masses of reinforcement of 210 g m-2 and 550 g m-2 and orientations 0°/90° and ±45°. Micromechanical analysis of the failure was performed in order to determine real models and mechanisms of crack and temperature influence on the impact properties. .

Cilj ovog rada je da prikaže uticaj visokih i niskih temperatura na udarna svojstva stakleno-epoksidnih kompozita. Udarna jačina prikazana je za četiri različite strukture stakleno−epoksidnih kompozita na tri različite temperature, tj. na sobnoj t=20°C, povišenoj t=+50°C i niskoj temperaturi t=-50°C. Standardno mehaničko testiranje obavljeno je za kompozite sa masama ojačanja 210 g m-2 i 550 g m-2 i orjentacije 0°/90° i ±45°. Mikromehanička analiza oštećenja izvedena je sa ciljem da se odrede realni modeli i mehanizmi loma i uticaja temperature na udarna svojstva.