A NEW DISPLACEMENT-BASED APPROACH TO CALCULATE STRESS INTENSITY FACTORS WITH THE BOUNDARY ELEMENT METHOD

Authors

  • MARCO GONZÀLEZ SIMON BOLIVAR UNIVERSITY
  • PAULO TEIXEIRA SIMON BOLIVAR UNIVERSITY
  • LUIZ C. WROBEL BRUNEL UNIVERSITY
  • MANUEL MARTÍNEZ CENTRAL UNIVERSITY OF VENEZUELA

Keywords:

BOUNDARY ELEMENT METHOD, STRESS INTENSITY FACTORS, DISPLACEMENT TECHNIQUES, J-INTEGRAL

Abstract

THE ANALYSIS OF CRACKED BRITTLE MECHANICAL COMPONENTS CONSIDERING LINEAR ELASTIC FRACTURE MECHANICS IS USUALLY REDUCED TO THE EVALUATION OF STRESS INTENSITY FACTORS (SIFS). THE SIF CALCULATION CAN BE CARRIED OUT EXPERIMENTALLY, THEORETICALLY OR NUMERICALLY. EACH METHODOLOGY HAS ITS OWN ADVANTAGES BUT THE USE OF NUMERICAL METHODS HAS BECOME VERY POPULAR. SEVERAL SCHEMES FOR NUMERICAL SIF CALCULATIONS HAVE BEEN DEVELOPED, THE J-INTEGRAL METHOD BEING ONE OF THE MOST WIDELY USED BECAUSE OF ITS ENERGY-LIKE FORMULATION. ADDITIONALLY, SOME VARIATIONS OF THE J-INTEGRAL METHOD, SUCH AS DISPLACEMENT-BASED METHODS, ARE ALSO BECOMING POPULAR DUE TO THEIR SIMPLICITY. IN THIS WORK, A SIMPLE DISPLACEMENT-BASED SCHEME IS PROPOSED TO CALCULATE SIFS, AND ITS PERFORMANCE IS COMPARED WITH CONTOUR INTEGRALS. THESE SCHEMES ARE ALL IMPLEMENTED WITH THE BOUNDARY ELEMENT METHOD (BEM) IN ORDER TO EXPLOIT ITS ADVANTAGES IN CRACK GROWTH MODELLING. SOME SIMPLE EXAMPLES ARE SOLVED WITH THE BEM AND THE CALCULATED SIF VALUES ARE COMPARED AGAINST AVAILABLE SOLUTIONS, SHOWING GOOD AGREEMENT BETWEEN THE DIFFERENT SCHEMES.

Author Biographies

MARCO GONZÀLEZ, SIMON BOLIVAR UNIVERSITY

MECHANICAL DEPARTMENT - FULL PROFESSOR

INSTITUTE OF ENERGY, DIRECTOR

PAULO TEIXEIRA, SIMON BOLIVAR UNIVERSITY

MECHANICAL DEPARTMENT - ASSISTANT PROFESSOR

LUIZ C. WROBEL, BRUNEL UNIVERSITY

SCHOOL OF ENGINEERING AND DESIGN, PROFESSOR

DEPUTY HEAD OF SCHOOL (RESEARCH)

INSTITUTE OF MATERIALS AND MANUFACTURING, DIRECTOR

MANUEL MARTÍNEZ, CENTRAL UNIVERSITY OF VENEZUELA

SCHOOL OF MECHANICAL ENGINEERING, FULL PROFESSOR

GRADUATED STUDIES - FACULTY OF ENGINEEERING, DIRECTOR,

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Published

2015-02-07

Issue

Vol. 12 No. 9 (2015)

Section

Articles

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