Abstract: The invention relates to a laminate composed of two, three, four or more aluminum-containing metal sheets. The metal sheets, which may for instance be of an aluminum alloy, are bonded together by means of adhesive layers. In the adhesive layers, which are of a thermohardening material, there are embedded poly-paraphenylene terephthalamide threads. These threads are provided in the form of yarns made up of endless filaments and lie in a practically straight line in the adhesive which substantially consists of a thermohardening material. The adhesive layers contain the threads in an amount of 20 to 80% by weight.

Abstract: The invention relates to a laminate composed of two, three, four or more metal sheets. The metal sheets, which may for instance be of an aluminum alloy, are bonded together by means of adhesive layers. In the adhesive layers there are embedded poly-paraphenylene terephthalamide or carbon threads having a high modulus of elasticity. In the unloaded state of the laminate in its entirety there is a compressive stress in the range of 0 to 200 or 300 N/mm.sup.2 in each metal sheet and a tensile stress in each layer with threads. The material according to the invention is in the first place meant for use in the field of aircraft or spacecraft engineering. However, it also may with advantage find application in various other fields of engineering where high demands are made on static, dynamic fatigue properties and damage tolerance.