Influence of interface yield strength on the SIF for a crack in a fiber and energy absorbed at fiber fracture

A.V.Borovik
 

Modern Problems in Physical Materials Science - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2014, #23
http://www.materials.kiev.ua/article/1777

Abstract

It is considered one of the mechanisms for implementing the main feature of structural material that responsible for the maximum fracture resistence. This mechanism is a thin perfect plastic interlayer between load-bearing elements of material structure. The "cracked fiber-in-tube" model is employed to study the influence of interlayer yield strength on the SIF for a crack in a fiber and on the energy absorbed by inelastic shear at the interfaces of fibers at their fracture. We have obtained the interlayer yield strength and the distance between cracks in a fiber at which the maximum energy is absorbed during material fracture at the stage of cracks growth in fibers. This stage precedes the pullout of completely fractured fibers.


CRACK, FIBER, FRACTURE ENERGY, LIMIT OF YIELD, STRESS INTENSITY FACTOR, STRUCTURAL MATERIAL