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Showing 1 to 6 of 6 for “"fatigue crack closure"”.
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An Analytical Model Which Combines Roughness- and Plasticity- Induced Fatigue Crack Closure
"The fatigue notch size effect was investigated using the PICC-RICC model. The initial crack length (a$\rm\sb{i})$ for propagation was estimated. The predicted notch fatigue strength compared favorably with the Initiation-Propagation (I-P) Model prediction and test data. The existence of a ""worst …
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Fatigue Crack Closure and Crack Growth Outside the Small Scale Yielding Regime
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1988.
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Investigation of thermal effects on fatigue crack closure using multiscale digital image correlation experiments
… multiple length scales, the thermal effects on fatigue crack closure of Hastelloy X, a nickel-based superalloy. Using multiscale, digital image correlation (DIC), macroscale experiments were performed at 2x magnification (2 µm/pix), providing full-field crack closure measurements. Microscale …
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The Effects of Load Ratio on Threshold Fatigue Crack Growth of Aluminum Alloys
… structures are threatened by the presence of cracks. Structural failure occurs if a crack larger than a critical size exists. Although most well designed structures initially contain no critical cracks, subcritical cracks can grow to failure under fatigue loading, called fatigue crack growth …
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Relating fatigue crack growth to microstructure via multiscale digital image correlation
This work investigates fatigue crack growth at multiple scales and links material deformation to microstructural properties. The optical technique of digital image correlation (DIC) is well suited for this task since it provides quantitative full-field deformation measurements at multiple length …
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Vliv geometrie vzorku na úroveň zavíracího napětí před čelem únavové trhliny
… a to vzorků „compact tension specimen“ a „center cracked plate tension specimen“, s použitím nelineárního materiálového modelu. Modelování celého jevu je prováděno pomocí metody konečných prvků v programovacím jazyku, APDL, programu Ansys. První část práce se zabývá rešeršním výzkumem dané …