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Snap-back softening instability in high-strength concrete beams
Abstract Three-point bending tests on pre-cracked slabs of high-strength concrete are interpreted on the basis of a virtual crack propagation model. As theoretically shown by the model, a snap-back softening instability appears only for initial crack lengths smaller than 0.3 times the beam depth. As a limit-case, when the material is sufficiently brittle or the specimen size is sufficiently large, such an instability can be predicted by the LEFM condition K1=KIC.
Snap-back softening instability in high-strength concrete beams
Abstract Three-point bending tests on pre-cracked slabs of high-strength concrete are interpreted on the basis of a virtual crack propagation model. As theoretically shown by the model, a snap-back softening instability appears only for initial crack lengths smaller than 0.3 times the beam depth. As a limit-case, when the material is sufficiently brittle or the specimen size is sufficiently large, such an instability can be predicted by the LEFM condition K1=KIC.
Snap-back softening instability in high-strength concrete beams
Biolzi, L. (author) / Cangiano, S. (author) / Tognon, G. (author) / Carpinteri, A. (author)
Materials and Structures ; 22 ; 429-436
1989-11-01
8 pages
Article (Journal)
Electronic Resource
English
Fracture Toughness , Linear Elastic Fracture Mecha , Crack Depth , Crack Mouth Opening Displacement , Initial Crack Length Engineering , Theoretical and Applied Mechanics , Structural Mechanics , Mechanical Engineering , Operating Procedures, Materials Treatment , Civil Engineering , Building Materials
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