Ultimate Bending Strength Evaluation of U-Notched Ductile Steel Samples Under Large-Scale Yielding Conditions

The load-bearing capacity of several U-notched specimens, reported in literature, made of very ductile steel and loaded under symmetric three-point bending were theoretically estimated by using the Equivalent Material Concept (EMC), proposed originally by the author, combined with two well-known bri...

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Bibliographic Details
Published in:International journal of fracture 2013-04, Vol.180 (2), p.261-268
Main Author: Torabi, A. R.
Format: Article
Language:English
Subjects:
Accuracy
Automotive Engineering
Bearing capacity
Bend strength
Characterization and Evaluation of Materials
Chemistry and Materials Science
Civil Engineering
Classical Mechanics
Cracking (fracturing)
Criteria
Ductile fracture
Elastic analysis
Equivalence
Fracture mechanics
Letters in Fracture and Micromechanics
Materials Science
Mechanical Engineering
Model accuracy
Steels
Stresses
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Summary:The load-bearing capacity of several U-notched specimens, reported in literature, made of very ductile steel and loaded under symmetric three-point bending were theoretically estimated by using the Equivalent Material Concept (EMC), proposed originally by the author, combined with two well-known brittle fracture models namely the mean stress (MS) and the point stress (PS) criteria. The results revealed that the MS-EMC model with an accuracy of more than 90% was more efficient than the PS-EMC model with about 72% accuracy. By using the MS-EMC model, one can predict well the onset of mode I cracking in U-notched ductile components under large-scale yielding conditions without requiring conducting elastic-plastic analyzes or using ductile fracture criteria.
ISSN:0376-9429
1573-2673
DOI:10.1007/s10704-013-9804-9