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.
Results
Showing 1 to 10 of 10 for “"mode-mixity"”.
-
Domain-Integral Methods for Computation of Fracture-Mechanics Parameters in Three-Dimensional Functionally-Graded Solids
… along crack fronts in FGM configurations under mode-I thermo-mechanical loading. The proposed domain integral formulation accommodates both linear-elastic and deformation-plastic behavior in FGMs. Next discussed is the extension of interaction-integral procedures to compute directly mixed-mode …
-
Cohesive Modeling of Dynamic Fracture: Rate Dependence and Intersonic Crack Motion
… transient intersonic crack motion under mixed-mode conditions. Results show that exclusive shear damage in the cohesive zone is responsible for intersonic crack propagation even though the external load comprises of both shear and tensile components. The situation is very different in the …
-
Crack path selection and shear toughening effects due to mixed mode loading and varied surface properties in beam-like adhesively bonded joints
… some critical environments, complicated loading modes, or uncertainties in material/interfacial properties are involved. From a mechanics perspective, areas of current interest include understanding the growth of damage and cracks, loading rate dependency of crack propagation, and the effect of …
-
Stress Intensity Factor Distributions in Bimaterial Systems - A Three Dimensional Photoelastic Investigation
… direction of far field tensile loading. Mixed-mode stress intensity factors are observed and quantified using a simplified analytical algorithm which makes use of experimentally measured data. In this series of tests, the bimaterial specimens consist of a photoelastic material bonded to the …
-
Finite Element Analysis of Probe Induced Delamination of a Thin Film at an Edge Interface
… to theoretical limit cases. Upon validation, mode I, mode II, and mode III energy release rates are extracted from three-dimensional continuum finite element models of the edge-loaded thin film by a three-dimensional modified crack closure method. Having assumed a circular debond as observed …
-
Atomistic Modeling Predictions Of Crack Tip Behavior In Silicon Carbide
… composes three papers detailing work intended to model the crack tip behavior in silicon carbide (SiC). While having impressive thermal, mechanical, and electrical properties, the utility of SiC as a structural material is often limited by its low fracture toughness. My studies focus on the …
-
Computational modeling of laser-induced delamination testing of thin films
… The objective of the current effort is to model the effect of residual stresses on the dynamic delamination of thin films. Residual stresses can be high enough to affect the crack advance and the mode mixity of the delimitation event, and must therefore be adequately modeled to make …
-
Characterization of Mixed-Mode Fracture Testing of Adhesively Bonded Wood Specimens
… strain energy release rates (G) for mixed-mode (I/II) fracture of wood adhesive joints. The aims of the study were: (1) quantifying the fracture properties of two material systems, (2) analyzing the aspects that influence the fracture properties of bonded wood, (3) refining test procedures …
-
Durability of Polyimide Adhesives and Their Bonded Joints for High Temperature Applications
… among the three adhesive systems. The effect of mode-mixity on the fracture toughness of the Ti-6Al-4V/FM-5 adhesive bonded system was also evaluated. DCB tests in conjunction with end-notched flexure (ENF) and mixed-mode flexure (MMF) tests, were used to fracture the bonded joints under pure …
-
Solution of Linear Elastostatic and Elastodynamic Plane Problems by the Meshless Local Petrov-Galerkin Method
… the deformation fields near the notch tip are mode-II dominant. The mode mixity parameter can be changed in an orthotropic plate by adjusting the ratio of the Young's moduli in the axial and the transverse direction. The plane strain problem of compressing a linear elastic material confined in …