Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Edge Cracks"”.
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Stress intensity factors of edge cracks in dissimilar joint plates
… will focused on the stress intensity factor on edge crack between dissimilar joint plates. The study focused on the investigation of edge crack behavior of dissimilar joint plates and to find out stress intensity factor (SIF) of dissimilar joint plates under different conditions by using finite …
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ΜΕΛΕΤΗ ΤΗΣ ΕΛΑΣΤΙΚΗΣ-ΑΠΟΛΥΤΩΣ ΠΛΑΣΤΙΚΗΣ ΕΝΤΑΤΙΚΗΣ ΚΑΙ ΠΑΡΑΜΟΡΦΩΣΙΑΚΗΣ ΚΑΤΑΣΤΑΣΕΩΣ ΡΗΓΜΑΤΩΜΕΝΩΝ ΠΛΑΚΩΝ ΣΕ ΣΥΝΘΗΚΕΣ ΕΠΙΠΕΔΟΥ ΕΝΤΑΣΕΩΣ
… STRAIN FIELD AROUND THE CRACK TIP IN METALLIC EDGE CRACKED SPECIMENS DEVELOPS. THEBIREFRINGENT COATING TECHNIQUE WAS APPLIED TO ESTIMATE ELASTIC AND PLASTIC DEFORMATIONS AS WELL AS TO DEFINE THE ELASTIC-PLASTIC BOUNDARIES IN SUCCESSIVE LOADING STEPS UNDER CONDITION OF PLANE STRESS. THE …
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Vliv tloušťky vrstev keramického laminátu na bifurkaci trhliny
… byl sledován vznik tzv. hranových trhlin (edge cracks) ve vrstvách obsahujících tlaková zbytková pnutí. Výsledky pozorování přítomnosti hranových trhlin pro různou konfiguraci velikosti zbytkových napětí a tloušťky vrstev byly srovnány s teoretickou předpovědí vytvořenou pomocí …
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A Numerical Based Determination of Stress Intensity Factors for Partially Cracked Flexural I-shaped Cross-sections
… evaluation are consistently revised using knowledge of previous bridge failures. Although modern steel structures are designed to resist fatigue cracking from service loads, cracks in the tension flanges of steel bridge girders have been observed as a result of stress concentrations, design …
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ΘΕΩΡΗΤΙΚΗ ΚΑΙ ΠΕΙΡΑΜΑΤΙΚΗ ΜΕΛΕΤΗ ΠΡΟΒΛΗΜΑΤΩΝ ΡΩΓΜΩΝ ΣΕ ΣΥΝΘΕΤΕΣ ΠΛΑΚΕΣ
… OF A CRACK TERMINATED AT THE APEX OF A BIWEDGE, WHICH IS LOADED EITHER BY PRESCRIBED TRACTIONS OR DISPLACEMENTS. IN THE FOURTH CHAPTER, THE INFLUENCE OF A CIRCULAR INCLUSION ON THE PREVAILING STRESS STATE IN A CRACKED PLATE, WHICH IS SUBMITTED AT INFINITY TO BIAXIAL ANTIPLANE SHEAR, WAS …
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Tensile Mechanics of the Knee Meniscus in the Context of Cracks: Failure and Fracture Mechanisms, Strain Concentrations, and the Effect of Specimen Shape
Knee meniscus tears (cracks) are a major cause of knee dysfunction and osteoarthritis, but little is known about how they grow or what effects they have on meniscus mechanics. The objective of this work was to investigate the mechanics and failure of crack-free and cracked meniscus in uniaxial …
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Numerical investigation of the edge profile in hot-rolling
… is minimal. However, the deformation on these edges is important. During the initial passes a concave profile develops - the material near the surfaces spreads outward while the material at the centre moves inward. The concave profile can lead to defects in the final product; these are the …
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The dual boundary element method applied to semi-infinite surface cracks in two-dimensions
… the stress intensity factors (SIF) for surface cracks in semi-infinite solids via the DBEM. We first detail the derivations of the boundary element and dual boundary element methods. The main difficulty with these methods are integrations of the singular integrals which cannot be accuartely …
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The topological derivative and its applications to fracture-based analysis and design
… a two-dimensional domain associated with a small edge crack at any boundary location and any orientation. In this thesis, we extend this work. We first develop higher-precision approximations of the energy release rate field using higher-order topological derivatives, which allow the analyst to …
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Effect of grain structure and doping on the mechanical properties of polysilicon thin films for MEMS
… polysilicon were located at the specimen free edges which were defined by reactive ion etching (RIE). These defects were initiated at grain boundaries during RIE and were further exacerbated by the reactions taking place during heavy P-doping in high temperature annealing. Measurements of …