Fracture Mechanics and Fatigue Crack Propagation

1977 ◽  
pp. 112-147
Author(s):  
Terance V. Duggan ◽  
James Byrne
Keyword(s):  
Fatigue Crack ◽  
Fracture Mechanics ◽  
Crack Propagation ◽  
Fatigue Crack Propagation

Fracture Mechanics and Fractography of Creep and Fatigue Crack Propagation at Elevated Temperature

1976 ◽  
Vol 98 (4) ◽  
pp. 296-304 ◽  
Author(s):  
R. Koterazawa ◽  
Y. Iwata
Keyword(s):  
Fatigue Crack ◽  
Fracture Mechanics ◽  
Crack Propagation ◽  
Fatigue Crack Propagation ◽  
Compact Tension ◽  
304 Stainless Steel ◽  
Bending Stress ◽  
Type Specimens ◽  
Creep Crack ◽  
Repeated Stress

A fracture mechanics and fractographic study was conducted on creep and fatigue crack propagation of a 304 stainless steel under constant and repeated tensile stress at a temperature of 650°C. Linear elastic fracture mechanics could be applied to the test data fairly successfully in spite of the fact that the tests were conducted under creep conditions. A comparison with data in a literature indicated that this is not true for bending-type specimens such as the compact tension specimen because of redistribution of bending stress due to creep, and therefore a specimen geometry which avoids bending stress is preferred for creep crack testing. Under repeated stress, the crack generally started as a transgranular fatigue crack and changed to an intergranular creep crack at some length of the crack. The transition point moved to a later stage of crack propagation as the period of repeated stress increased. This transition phenomenon could be explained by assuming that the two crack propagation processes, the transgranular fatigue crack and the intergranular creep crack, are possible under repeated stress condition and that the one with the higher rate actually occurs.

Analysis of the Fatigue Crack Propagation Life-Span Based on Linear Elastic Fracture Mechanics

2012 ◽  
Vol 204-208 ◽  
pp. 3016-3021
Author(s):  
Zheng Wen Jiang ◽  
Shui Wan ◽  
Chen Cheng
Keyword(s):  
Fatigue Crack ◽  
Fracture Mechanics ◽  
Crack Propagation ◽  
Life Span ◽  
Fatigue Crack Propagation ◽  
Steel Specimen ◽  
Linear Elastic Fracture Mechanics ◽  
Linear Elastic ◽  
Elastic Fracture ◽  
Fatigue Crack Propagation Life

Abstract. The fatigue crack propagation life-span of the engineering structure is studied. Linear elastic fracture mechanics is applied to analyze the life-span of fatigue crack growth of specimen, which is under constant amplitude load. The software of Fatigue is used to calculate the life-span of a center crack plate steel specimen. The result show that the calculated values of the life-span are basically well with the experimental data.

Fracture Mechanics for Delamination Fatigue Crack Propagation of CFRP in Air and in Water

1991 ◽  
Vol 37 ◽  
pp. 149-160 ◽  
Author(s):  
M. Hojo ◽  
Keisuke Tanaka ◽  
Claes-Göran Gustafson ◽  
Ryuichi Hayashi
Keyword(s):  
Fatigue Crack ◽  
Fracture Mechanics ◽  
Crack Propagation ◽  
Fatigue Crack Propagation

scholarly journals AN ELASTO-PLASTIC FRACTURE MECHANICS APPROACH TO FATIGUE CRACK PROPAGATION

1976 ◽  
Vol 19 (132) ◽  
pp. 571-576 ◽  
Author(s):  
Masaki WATANABE ◽  
Kin-ichi NAGAI ◽  
Susumu HIOKI
Keyword(s):  
Fatigue Crack ◽  
Fracture Mechanics ◽  
Crack Propagation ◽  
Fatigue Crack Propagation
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