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Showing 1 to 20 of 26 for “"continuum damage mechanics"”.
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Higher-order Beam Theories for Continuum Damage Mechanics with Regularization Techniques
L'abstract è presente nell'allegato / the abstract is in the attachment
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Continuum Damage Mechanics to Model Glulam Beams Reinforced with Glued-In Steel Cables
This study aims to investigate the use of Continuum Damage Mechanics (CDM) for the computational modelling of timber, a material known for its high variability and anisotropy. Timber has not had a standard way of performing computational mechanics like that of steel and concrete, which has made …
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Continuum Damage Mechanics (CDM) modelling of dislocation creep in 9-12% Cr creep resistant steels
… based dislocation creep model using the Continuum Damage Mechanics (CDM) approach. A dislocation CDM model was developed and implemented in the current work for uniaxial creep loading using the numerical modelling software Matlabᵀᴹ. The CDM approach was built upon fundamental dislocation …
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High Cycle Fatigue Simulation using Extended Space-Time Finite Element Method Coupled with Continuum Damage Mechanics
… residual stress relaxation. Both safe-life and damage tolerance approaches are based on limited loading conditions and specimen geometry in the test. Extrapolation of such test data to the complicated parts with multiaxial loading conditions becomes very difficult. Motivated by these …
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Evaluating mode of loading effect and laboratory fatigue performance of asphalt concrete using viscoelastic continuum damage mechanics
… the flexural pseudostiffness and amount of damage in the specimen. To verify the accuracy of the fatigue prediction model, fatigue tests were conducted on specimens that were not part of preliminary analysis. The fatigue life predictions made were comparable to actual measurements. The …
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Dynamic modelling of lightweight high-strength concrete under impact
… static and dynamic loadings. A new strain-based damage model is developed based on continuum damage mechanics. The proposed model incorporates the strain rate effects on various concrete properties, such as tensile and compressive strengths, critical strains and elastic moduli. In the numerical …
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Modelagem de fratura dúctil em colisão de embarcações utilizando modelo de dano de Lemaitre modificado
… to ship collision and stranding, based on the Continuum Damage Mechanics (CDM), where new internal variables are inserted in the material constitutive equations, related to the damage produced by the stress field. The objective of this thesis is to propose and assess a modification in …
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Elastic-Damaging Plasticity Model for Ductile Fracture
… or microcracks. However, the model uses a continuum approach that can capture the global effect of ductile fracture behavior. It consists of two uncoupled material models; an elastic-damaging model that employs continuum damage mechanics and a von Mises plasticity model. The …
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Microstructure-based modeling of damage and healing in salt rock with application to geological storage
… This research investigates the modeling of damage and healing in rocks with applications in geological storage. This presentation focuses on salt rock, which is used as a model material to study rock microstructure evolution under various stress paths, and to understand the microscopic …
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Laboratory investigation of fatigue endurance limits in asphalt concrete
… threshold of strain value below which no fatigue damage occurs. This concept is known as the fatigue endurance limit (FEL). Although previous studies have shown that an endurance limit does exist for HMA mixtures, an established value is yet to be determined, with values varying from 70-400 …
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Analysis of laminated architectural glazing subjected to combined wind and debris impact loading
… studying the stress response, failure and damage analysis of rectangular laminated architectural glazing against combined wind and windborne debris impact. Here both small-hard (like roof gravel) and large-soft (like timber) windborne debris are considered. The stress response of the …
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Progressive Failure Analysis of Double-Notched Composite Laminates
… property degradation method for the in-plane damage prediction which assumes that a damage material can be replaced by an equivalent material with degraded properties. The delamination in composites, on the other hand, is often accounted for by the fracture mechanics approach which relies on …
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Energy and Thermodynamically Based Approaches for Analysis of Damage in Contact Problems
<p>A novel methodology for analysis of damage in contact problems in presented. Two important categories of contact damage are studied, namely crack nucleation and adhesive wear. The proposed methodology is primarily based on the laws of energy and thermodynamics, and as such offers great …
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Progressive Failure Analysis of Laminated Composite Structures
… includes both initiation and propagation of damage. In this work a progressive failure methodology is developed and implemented in the commercial Finite Element software package, Abaqus. Out of the numerous failure criteria available in the literature to study damage initiation and …
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Numerical Methods for Fluid-Solid Coupled Simulations: Robin Interface Conditions and Shock-Dominated Applications
… flow (e.g., bubbles), and shock-induced material damage and fracture. A recently developed three-dimensional computational framework is employed, which couples a multiphase, compressible CFD solver and a nonlinear finite element CSD solver using an embedded boundary method and a partitioned …
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Multi-Length Scale Modeling of Rubber Tribology For Tire Application
… from surface undulations. Later, contact mechanics models developed using Hertzian technique or stochastic approach were considered in conjunction with frictional losses to obtain the hysteretic component of friction to consider the effect of surface roughness. Previous studies at CenTiRe …
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DEVELOPMENT OF FATIGUE MODELS FOR COPPER TRACES ON PRINTED WIRING ASSEMBLIES UNDER QUASI-STATIC CYCLIC MECHANICAL BENDING
… improve on the fatigue constants, the fatigue damage initiation and propagation behavior were considered separately, using a continuum damage mechanics method termed the successive initiation method. In this phase of the study, the constitutive model constants were those determined from the AFC …
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Damage Development in Static and Dynamic Deformations of Fiber-Reinforced Composite Plates
… delamination between adjoining layers, and damage due to fiber breakage, fiber/matrix debonding, and matrix cracking. The three damage modes are modeled using the theory of internal variables and the delamination by postulating a failure envelope in terms of the transverse stresses; the …
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