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Showing 1 to 20 of 44 for “"Damage mechanics"”.
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Discrete Damage Mechanics Applied To Transverse Matrix Cracking
… for the limiting cases of intact and completely damaged material. The user subroutine was then used to predict the crack density, longitudinal elastic modulus and Poisson's ratio as a function of strain or stress for laminates reported in the literature. For this purpose, the energy release rate, …
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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
… 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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A damage mechanics approach to the three dimensional constitutive modelling of ice deformation
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1989.
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Viscoplasticity and damage mechanics models for rate-dependent materials and their application to ice
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1997.
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Continuum Damage Mechanics (CDM) modelling of dislocation creep in 9-12% Cr creep resistant steels
… 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 theory as …
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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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A Model for Prediction of Fracture Initiation in Finite Element Analysis of Bolted Steel Connections
… in bolted structural steel connections using damage mechanics. A material failure envelope has previously been developed for aluminum extrusions using the IDS (instability, ductile, and shear) criterion. The IDS criterion is a damage mechanics based model for defining failure envelopes. These …
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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
… 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 Lemaitre’s damage …
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Elastic-Damaging Plasticity Model for Ductile Fracture
… an elastic-damaging model that employs continuum damage mechanics and a von Mises plasticity model. The elastic-damaging model is based on the assumption that damage occurs due only to hydrostatic tension, and this, combined with the von Mises plasticity model, allows a simple formulation of the …
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Thermomechanical analysis of rock asperity in fractures of enhanced geothermal systems
… is studied by establishing an un-symmetric damage mechanics model. The deformation curve of asperity under thermal stress is determined. Thirdly, deformation of fracture with various asperities on it in response to thermal stress is analyzed by a new stratified continuum percolation model. …
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Modelling to predict the reliability of solder joints
… creep laws and fatigue laws, and advanced damage mechanics methods. The use of FEA (Finite Element Analysis) to model creep along with a fatigue law to predict lifetime appears to be the most widely used and validated technique at present. The FEA discretisation of elasticity problems is …
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Mechanics and Durability of Fiber Reinforced Porous Ceramic Composites
… average field formalism, a computational micromechanics approach was developed to estimate the effective elastic properties of a highly porous material with random microstructure. A meso-level analytical model based on the energy principles was developed to estimate the global elastic …
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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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