A Fracture Mechanics Fatigue Analysis of Two High Strength Steels for Tractor Equalizer Bar Application 750047
Using linear elastic fracture mechanics concepts, two steels quenched and tempered to Rockwell C 40-47 were evaluated for application in crawler tractor main frames. These high strength steels were D6-B and an experimental steel whose chemistry was optimized using a digital computer procedure referred to as the CHAT system, an acronym standing for Computer Harmonized-Application Tailored. Fatigue crack growth rate da/dN versus ΔK for constant amplitude loading and plane strain fracture toughness KIc parameters were determined from compact specimens. These parameters together with approximate stress intensity calculations were utilized to estimate component fatigue crack growth life assuming various initial crack sizes. These estimations were compared with accelerated component fatigue life, which included both crack initiation and crack growth.
Citation: Week, R. and Stephens, R., "A Fracture Mechanics Fatigue Analysis of Two High Strength Steels for Tractor Equalizer Bar Application," SAE Technical Paper 750047, 1975, https://doi.org/10.4271/750047. Download Citation
Author(s):
Robert D. Week, Ralph I. Stephens
Pages: 10
Event:
1975 Automotive Engineering Congress and Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Fatigue
Steel
Frames
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