Mostafa Mobasher

Mostafa Mobasher
New York University Abu Dhabi

PhD, Computational Mechanics

About

18
Publications
8,737
Reads
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86
Citations
Additional affiliations
January 2014 - present
Columbia University
Position
  • Research Assistant
September 2011 - January 2014
The British University in Egypt
Position
  • Research Assistant

Publications

Publications (18)
Article
Full-text available
We present a novel non-local integral-type damage formulation for hydraulic fracture of poro-viscoelastic media under the framework of irreversible thermodynamics. The poro-viscoelastic material is modeled by a generalized Maxwell model, whose shear modulus is described in terms of Prony series. A bilinear damage law is assumed, which is driven by...
Article
Full-text available
In oil and gas (O&G) exploration the well casing, in the form of a long steel tube, maintains the opening of the drilled well hole. Mechanical equipment is often inserted into the well for the purpose of well monitoring, pressure control and various operations. This downhole equipment may be mechanically connected to the pipe casing by the outward...
Article
Full-text available
Recent experiments and physical evidence show that fractured porous media feature cracks and fluid capillary networks at various scales. We present a multi-physics macro-scale model that can distinguish between the mechanics and transport interactions. The porous media is represented by a poroelastic domain incorporating non-local damage and non-lo...
Article
Full-text available
We present a novel dynamic poroelastic model for soil consolidation in an isotropic homogeneous fluid saturated porous media. A non-local integral-type continuum damage formulation is applied to describe the damage evolution under dynamic excitations, in which a bilinear damage law is assumed. The governing equations are obtained by considering the...
Article
ABSTRACT: Recent experiments and field observations show that fractured geomaterials exhibit hierarchal crack networks and fluid-flow capillary networks at multiple scales. Fracturing is often associated with non-linear material response such as plasticity and softening. We present a novel non-local continuum damage model for hydraulic fracturing....
Conference Paper
We present VistaDam, a physics-based ductile fracture material model that is tailored to predict failure in thin metal sheets. VistaDam is based on a three invariant plasticity model in which metal fracture is dependent on the combined evolution of the triaxial stresses as well as the third invariant of deviatoric stress. Thus, VistaDam can predict...
Conference Paper
Prediction of large-scale marine structures under extreme loading conditions (e.g. impact, fire) requires the use of computational tools that are both accurate and efficient. To resolve models at this scale, engineers normally use shell elements in which two of the (in-plane) dimensions are much larger than the third (thickness) one. Herein, we pro...
Article
Full-text available
We present a novel non-local damage transport model for hydraulic fracture in porous media. The new model is sought to provide an enhanced description for the long-range damage and transport interactions in the fracture process zone. The non-local model is derived from thermodynamic principles, where a new thermodynamic potential expression for non...
Conference Paper
Full-text available
We present VistaCal, a software component of VistaMat Suite (vistamat.com) developed by Thornton Tomasetti-Weidlinger Applied Science Practice (TT-WAS) to facilitate efficient, high fidelity advanced material modeling for industrial applications. VistaCal is focused on the calibration of non-linear material models widely used in commercial FEM soft...
Article
Full-text available
We present a novel damage-poroelastic model for analyzing the failure response of porous media in geomechanics applications. In this new approach, a gradient non-local permeability that leads to non-local transport and consequently non local damage, is introduced. Damage evolution is a function of an equivalent strain measure that is computed from...
Article
This paper introduces a new system that utilizes the advantages of boundary element analysis in structural engineering applications. A standardized building information model (BIM) for automated structural analysis and design of reinforced concrete plates based on the boundary element method (BEM) is proposed. Based on the model view definition app...
Article
Full-text available
The presence of water-filled crevasses is known to increase the penetration depth of crevasses and this has been hypothesized to play an important role controlling iceberg calving rate. Here, we develop a continuum-damage-based poro-mechanics formulation that enables the simulation of water-filled basal and surface crevasse propagation. The formula...
Article
Full-text available
This paper introduces a new system that utilizes the advantages of boundary element analysis in structural engineering applications. A standardized building information model (BIM) for automated structural analysis and design of reinforced concrete plates based on the boundary element method (BEM) is proposed. Based on the model view definition app...
Article
We propose a coupled Boundary Element Method (BEM) and Finite Element Method (FEM) for modeling localized damage growth in structures. BEM offers the flexibility of modeling large domains efficiently while the nonlinear damage growth is accurately accounted by a local FEM mesh. An integral-type nonlocal continuum damage mechanics with adapting FEM...
Poster
Full-text available
Finite Element Method (FEM) has proven its versatility in modeling non-linear problems. However, in some cases the, the non-linearity zones are localized and using finite elements to model the whole problem becomes an expensive process. Continuum Damage Mechanics (CDM) has been proven as a nice approach to model non-linear behavior of structures. C...

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Projects

Project (1)
Project
The goal of this project is to develop the necessary tools that can allow the efficient modeling of hydraulic fracturing of geomaterials using damage mechanics. The tools being developed encompass: 1- relevant material models 2- mixed non-linear finite element solution approach 3- efficient non-linear finite element solution approach