|Table of Contents|

Fatigue Fracture Analysis of Pressure Vessel with Cracks(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2007年03期
Page:
87-90
Research Field:
Publishing date:
2007-09-20

Info

Title:
Fatigue Fracture Analysis of Pressure Vessel with Cracks
Author(s):
GUO Dong;  ZHAI Zhen-dong;  LIU Dong-po
School of Architectural Engineering, Chang'an University, Xi'an 710061, Shaanxi, China
Keywords:
pressure vessel;  crack extension;  critical crack size;  fatigue life
PACS:
TU311
DOI:
-
Abstract:
In order to study the fatigue of pressure vessel commonly encountered problem in engineering with large destructibility, based on the theory of fracture mechanics, the pressure vessel existing original crack was equivalent to the problem of infinite flat with center crack. The stress intensity factors of infinite flat forced uniform tensile stress at infinite place with surface half ellipse crack and through crack were deduced. The critical crack size can be ascertained by the criterion. Using the Paris expression to analyze the crack extends speed, the crack fatigue extension life of different original crack sizes and forms was deduced. The results show that the fatigue life of pressure vessel with different original crack sizes and forms can be clearly expressed by crack fatigue extension life. These analyzed conclusions provide theoretical reference for the active security assess of using pressure vessel.

References:

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Last Update: 2007-09-20