Composite Materials Z-Fracture Criterion and Expert System: Fracture Criterion and Expert System

Author: Zhang Shaoqin
Publisher:
Publish Date: 2003-09-01
Features: This book is available for reference use by college students, university teachers, engineers, and researchers in related fields. It focuses on the latest research findings in the field of fracture theory of composite materials—the Z-fracture criterion for composites. Extensive experimental evidence shows that this criterion can not only accurately predict the crack propagation direction of composite materials but also solve complex design problems for fracture resistance of composite components. Additionally, it provides a detailed introduction to the engineering application software developed based on the Z-fracture criterion—the Composite Fracture Analysis Expert System. This software system is practical and fast, capable of calculating fracture parameters for Type I, Type II, Type III, and mixed-mode cracks in composite plates: stress intensity factor, S-factor, Z-factor, J-integral, stress and strain fields at the crack tip, crack propagation direction prediction, and fracture resistance safety factor. Furthermore, it explores the fundamentals of fracture mechanics of composite materials. Using the method of complex functions, it derives the stress and displacement fields at the crack tip by solving the boundary value problems of partial differential equations. It also discusses the application of J-integral in the Z-fracture criterion.