Brittle fracture resistance and damping properties of layered metal-polymer composites

Abstract

One of the topical trends in modern materials science is the development and study of new layered metal-polymer composites, which are increasingly used in aerospace engineering, automotive and transport engineering. The metal base of these composites provides a high level of strength properties and impact strength, and the polymer interlayer allows obtaining high damping properties due to its ability to dissipate the energy of elastic vibrations. Of a considerable practical interest is one of the varieties of metal-polymer composite materials based on a sandwich structure -layered steel-rubber composite characterized by pronounced viscoelastic properties, which allows them to be used as vibration damping elements in transport systems. In this work, the possibility of obtaining promising layered metal-rubber composites based on low-carbon steels (Fe-2Mn-1Si steel, IF steel), aluminum alloy Al-Mg3 and heat-and-frost-resistant rubber V-14-1NTA by hot pressing is studied. The influence of the composition and design of composites on the impact strength at temperatures of 20 and −60°C and the damping ability characteristics of materials such as the tangent of the angle of mechanical losses (tg δ), the modulus of elasticity (E ') and the modulus of viscosity (E '') are determined by the method of dynamic mechanical analysis. The possibility of using layered metal-rubber composites with increased resistance to brittle fracture in the region of low climatic temperatures, as well as in structural elements of transport systems with high vibration resistance is shown.

Adhesive and impact strength of hybrid layered metal-polymer composites reinforced by basalt fiber

“…Thus, in order to increase the impact strength of the layered composite structure, it is more efficient to introduce a strengthener material as a central layer in a symmetrical composite package. It is in good agreement with the result of previous studies reported in [9,10].…”

“…The increasing tendency of the impact strength of layered composites at lower temperatures is associated with the manifestation of the "delamination toughness" effect when the increase in impact strength mostly results from an increase in the extent of delamination in the composite. This effect is also observed on layered metallic and metal-rubber composites, the test results of which are given in works [10,15]. Since the working temperatures of BC-10T adhesive are in the range of −60…+300°C, the lowtemperature tests were carried out under critical conditions for the adhesive bond.…”

“…In this regard, the development and implementation of metal-polymer composite is an important and necessary requirement for designing new high-speed rail transport. Earlier works [9,10] have shown that layered metal-polymer composites based on steels, aluminum alloys and rubber can be used as elements of shock absorbers for high-speed rail transport due to their high damping properties, resistance to brittle and fatigue failure. To evaluate the influence of technology, type of adhesive and compositions of layered metal-polymer composites used for railway transport, studies were continued on composites based on steels, aluminum alloys and reinforced thermoplastic polymer.…”