Numerical Approach and Analytical Study of Cracks Severity in Bi-Notched Specimens P265GH

Select Volume / Issue:

• Volume 2,Issue 1, Jan. 2014

Year:

2014

Type of Publication:

Article

Keywords:

Pressurized Structures, Defects, Propagation Velocity, Length of Crack, Stress Intensity Factor, Strain Gauges

Authors:

HACHIM Abdelilah; CHOUAIRI Asmâa; Hariri Said; EL GHORBA Mohamed; LAKSIMI Abdelouahed; CHERGUI M’hamed; AKEF Abdelilah

Journal:

IJISM

Volume:

2

Number:

1

Pages:

47-52

Month:

January

Abstract:

To meet performance requirements increasingly high, manufacturers must now provide at best the presence of structural defects in their actual operating conditions. With a view to increased maintenance systems, validation of prototype has become an important issue. The noxiousness of the defects depends on the crack shape, size and other structural geometrical parameters. Use is made of a polynomial decomposition of stress field in vicitinity of the crack in order to cover all industrial loading. Our work is an application of fracture mechanics in the domain of pressurized structures with defects. Design of this type of structures is subjected to standards, codes and regulations driven by the potential risks which they represent. The knowledge of pressure limit on these structures allows respecting the safety domain. We present in this paper the numerical solutions and experimental results for stress distribution at defect tip. The evolution of the propagation velocity according to the length of crack and the variation of stress intensity factor will be treated by finite element simulation. Measures of strains near defects in the studied model have been made by strain gauges.

Full text: IJISM_39_Final.pdf [Bibtex]