Identification Damage Model for Thermomechanical Degradation of Ductile Heterogeneous Materials

• Published in: International Journal of Applied Mechanics and Engineering Vol. 22; no. 2; pp. 475 - 481
• Main Authors: Amri, A. El, Yakhloufi, M.H. El, Khamlichi, A.
• Format: Journal Article
• Language: English
• Published: Zielona Góra De Gruyter Open 24.05.2017; University of Zielona Góra, Institute of Mechanical Engineering; University of Zielona Góra
• Subjects: Accuracy; Alloys; Brittle materials; Brittleness; Ceramics; Computer simulation; Crack propagation; damage; Damage assessment; Damage detection; Destruction; Ductile brittle transition; Ductile fracture; Ductility; Fatigue failure; Fracture mechanics; Inertia; manufacturing; Mathematical models; Structural damage; thermal and mechanical fatigue; Thermomechanical analysis
• ISSN: 1734-4492; 2353-9003
• DOI: 10.1515/ijame-2017-0031

The failure of ductile materials subject to high thermal and mechanical loading rates is notably affected by material inertia. The mechanisms of fatigue-crack propagation are examined with particular emphasis on the similarities and differences between cyclic crack growth in ductile materials, such as metals, and corresponding behavior in brittle materials, such as intermetallic and ceramics. Numerical simulations of crack propagation in a cylindrical specimen demonstrate that the proposed method provides an effective means to simulate ductile fracture in large scale cylindrical structures with engineering accuracy. The influence of damage on the intensity of the destruction of materials is studied as well.