Effects of variation of material properties on the stress intensity factors of cracked anisotropic bodies

Sahli, A.; Nourine, L.; Boutchicha, D.; Kebdani, S.; Rahmani, O.
March 2015
Matériaux et Techniques;2015, Vol. 103 Issue 2, p1
Academic Journal
This paper presents a two-dimensional parametric study of the behavior of uniformly cooled homogeneous linear elastic anisotropic bodies containing cracks using the boundary element method (BEM). The present work investigates the effects of varying material properties, and varying orientation of these material properties, on the magnitude of the stress intensity factors (SIFs) of the cracked bodies. Three cracked plate geometries are considered in this study, namely: (1) a plate with an edge-crack; (2) a plate with a double edge-crack; (3) a plate with symmetric cracks emanating from a central hole. Where appropriate, finite element method (FEM) analyses are also performed in order to validate the results of the BEM analysis. The results of this study show that, for all crack geometries, the mode-I stress intensity factor, KI* decreases as the anisotropy of the material properties is increased. Additionally, for all these cases, KI* decreases as the angle of orientation of the material properties, θ, increases with respect to the horizontal axis. The results also show that BEM is an accurate and efficient method for two-dimensional thermoelastic fracture mechanics analysis of cracked anisotropic bodies.


Related Articles

  • Comparison of SGBEM-FEM Alternating Method and XFEM Method for Determining Stress Intensity Factor for 2D Crack Problems. Sarkar, Subhasis; Apetre, Nicole; Iyyer, Nagaraja; Phan, Nam; Goel, Kishan; Atluri, Satya // Advanced Materials Research;2014, Issue 891-892, p345 

    The two most promising approaches to determine Stress Intensity Factor (SIF) developed over the past decade are the Symmetric Galerkin Boundary Element Method - Finite Element Method (SGBEM-FEM) based alternating method and the Extended Finite Element (XFEM) method. The purpose of this paper is...

  • Stress intensity factors for high aspect ratio semi-elliptical external surface cracks in cylindrical vessels. Ql Hong-yu; GUO Peng-chao // Advanced Materials Research;2014, Vol. 986-987, p882 

    External surface cracks can occur in cylindrical vessels due to damage and propagate in the manufacturing process and during service life. Most of research focuses on stress intensity factors for surface cracks with low aspect ratios, i.e., a/c <1.0. Situation may well arise where the aspect...

  • Stress Intensity Factors for Plates with Collinear and Non-Aligned Straight Cracks. Surendran, M.; Palani, G. S.; Iyer, Nagesh R. // World Academy of Science, Engineering & Technology;Oct2012, Issue 70, p1173 

    Multi-site damage (MSD) has been a challenge to aircraft, civil and power plant structures. In real life components are subjected to cracking at many vulnerable locations such as the bolt holes. However, we do not consider for the presence of multiple cracks. Unlike components with a single...

  • An estimation of the high-pressure pipe residual life. Jovicic, G.; Nikolic, R.; Zivkovic, M.; Milovanovic, D.; Jovicic, N.; Maksimović, S.; Djokovic, J. // Archives of Civil & Mechanical Engineering (Elsevier Science);Mar2013, Vol. 13 Issue 1, p36 

    The paper presents an estimation of the residual life of the power plant high-pressure pipe, which has been in exploitation for years. A crack was noticed in the pipe, thus it was necessary to estimate the pipe material residual life until its eventual failure. The combined methodology for...

  • Evaluation of the SIF for the Multiple Crack Problems. LIU Jun-yu; ZHANG Ping; LIAO Meng-han; NING Bao-kuan // Applied Mechanics & Materials;2014, Issue 630-642, p66 

    In elastic fracture mechanics the evaluation of the stress intensity factor (SIF) for multiple cracks problems is an important issue. In the paper the scaled boundary finite element method (SBFEM) is used to solve the SIF of mode I of multiple crack problems. The solving domain is partitioned...

  • Closed form solution of stress intensity factors for cracks emanating from surface semi-spherical cavity in finite body with energy release rate method. Wan, Hualiang; Wang, Qizhi; Zhang, Xing // Applied Mathematics & Mechanics;Dec2016, Vol. 37 Issue 12, p1689 

    In this paper, a new semi-analytical and semi-engineering method of the closed form solution of stress intensity factors (SIFs) of cracks emanating from a surface semi-spherical cavity in a finite body is derived using the energy release rate theory. A mode of crack opening displacements of a...

  • Fracture analysis of a central crack in a long cylindrical superconductor with exponential model. Zhao, Yu Feng; Xu, Chi // Modern Physics Letters B;May2018, Vol. 32 Issue 14, p-1 

    The fracture behavior of a long cylindrical superconductor is investigated by modeling a central crack that is induced by electromagnetic force. Based on the exponential model, the stress intensity factors (SIFs) with the dimensionless parameter p and the length of the crack a/R for the...

  • A new formulation for estimating maximum stress intensity factor at the mid plane of a SENB specimen: Study based on 3D FEA. Kudari, S. K.; Kodancha, K. G. // Frattura e Integrita Strutturale;2014, Vol. 8, p419 

    In this investigation, three-dimensional elastic finite element analyses have been conducted to compute the stress intensity factor (KI ) in a SENB specimen with varied thickness (B) and crack-length to width ratio (a/W). The results indicate that the magnitude of KI depends on B, and...

  • Combining experimental and numerical analysis to estimate stress fields along the surface crack front. Chernyatin, A. S.; Matvienko, Yu. G.; Razumovsky, I. A. // Frattura e Integrita Strutturale;2013, Issue 25, p15 

    Combining experimental and computational method for determination of the singular and the nonsingular stress terms along the front of the 3D surface crack is proposed. Evaluation of the terms is based on comprehensive comparison between deformation responses (for measurement points on the...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics