Quasi-Brittle Fracture of Compact Specimens with Sharp Notches and U-Shaped Cuts
| Autor: | A. G. Demeshkin, V. M. Kornev |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Critical stress Mechanical Engineering 02 engineering and technology Physics::Classical Physics Condensed Matter Physics 01 natural sciences Physics::Geophysics 010305 fluids & plasmas 020303 mechanical engineering & transports 0203 mechanical engineering Natural rubber Mechanics of Materials visual_art 0103 physical sciences visual_art.visual_art_medium Composite material Intensity factor Brittle fracture |
| Zdroj: | Journal of Applied Mechanics and Technical Physics. 59:120-131 |
| ISSN: | 1573-8620 0021-8944 |
| DOI: | 10.1134/s0021894418010157 |
| Popis: | A two-parameter (coupled) discrete-integral criterion of fracture is proposed. It can be used to construct fracture diagrams for compact specimens with sharp cracks. Curves separating the stress–crack length plane into three domains are plotted. These domains correspond to the absence of fracture, damage accumulation in the pre-fracture region under repeated loading, and specimen fragmentation under monotonic loading. Constants used for the analytical description of fracture diagrams for quasi-brittle materials with cracks are selected with the use of approximation of the classical stress–strain diagrams for the initial material and the critical stress intensity factor. Predictions of the proposed theory are compared with experimental results on fracture of compact specimens with different radii made of polymethylmethacrylate (PMMA) and solid rubber with crack-type effects in the form of U-shaped cuts. |
| Databáze: | OpenAIRE |
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