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Structural Engineering and Mechanics
  Volume 3, Number 6, November 1995 , pages 541-554
DOI: https://doi.org/10.12989/sem.1995.3.6.541
 


The calculation of stress intensity factors by the surface integral method
Jin CS, Jang HS, Choi HT

 
Abstract
    The determination of the stress intensity factors is investigated by using the surface integral defined around the crack tip of the structure. In this work, the integral method is derived naturally from the standard path integral J. But the use of the surface integral is also extended to the case where body forces act. Computer program for obtaining the stress intensity factors K-I and K-II is developed which prepares input variables from the result of the conventional finite element analysis. This paper provides a parabolic smooth curve function. By the use of the function and conventional element meshes in which the aspect ratio (element length at the crack tip/crack length) is about 25 percent, relatively accurate K-I and K-II values can be obtained for the outer integral radius ranging from 1/3 to 1 of the crack length and for inner one zero.

 
Key Words
    stress intensity factor, J-integral, surface integral, smooth curve function
 
Address
Jin CS, PUSAN NATL UNIV,DEPT CIVIL ENGN,PUSAN 609735,SOUTH KOREA
PUSAN NATL UNIV,DEPT CIVIL ENGN,PUSAN 608080,SOUTH KOREA
PUSAN NATL UNIV,IND TECHNOL RES INST,PUSAN 609735,SOUTH KOREA
 

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