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 20 of 38 for “"CONTACT PROBLEMS"”.
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On the solution of frictional contact problems
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1990.
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Finite element analysis of large deformation contact problems
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1992.
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Friction models in the solution of nonstationary contact problems
… of the finite element method for the solution of contact problems the model of friction used is the classic Amontons-Coulomb. This dissertation is an attempt to rectify the current situation by considering four more advanced friction models, and coding them in FORTRAN for use with the finite …
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Numerical Analysis of Transient, Line-Contact Problems in Elastohydrodynamic Lubrication
… load-supporting or load-transmitting contacts. Such contacts exist, for example, in rolling-element bearings, gears and cam-follower mechanisms. In EHD lubrication, the contact surfaces are not only separated by a thin lubricating film, but also elastically deformed to an amount …
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A solution method for two- and three-dimensional contact problems
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1985.
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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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An evaluation of time integration schemes in the solution of contact problems
Contact analysis is an important branch of structural mechanics. The finite element method has become a major solution approach because of the high nonlinearities in contact problems. A large number of algorithms have been proposed and extensively used to solve engineering problems, but some issues …
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A consistent segment procedure for solution of 2D contact problems with large displacements
Solution of contact problems in solid mechanics using the finite element method is a challenging and non-trivial task. Stable and efficient contact algorithms are required for effective solution of general problems. In this thesis, a general algorithm is presented for the analysis of contacting …
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Solution of 2-D contact problems using a variational formulation with Lagrange multipliers
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1982.
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Nonlinear mixed finite element analysis for contact problems by a penalty constraint technique
… variational principle is developed for planar contact stress analysis. The formulation is based on the updated Lagrangian approach and accounts for geometric nonlinearity. In the mixed model, both displacements and stresses are approximated independently and this approach has in general been …
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An analysis of frictional effects in non-stationary contact problems for metal forming simulations
… processes and has been successfully used in contact problems which arise in processes such as deep-drawing, punching, extrusion and rolling. All these processes involve friction between the contact surfaces: the sheet-metal workpiece and the toolpieces. The model of friction is thus an …
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The use of a non-classical friction law in finite-element analysis of contact problems
… is given of the numerical treatment of contact problems in elasticity. Frictional effects on the contact surface are modelled by using a nonlocal, nonlinear friction law. Features of the boundary value problem, which merit special attention, are the presence of inequality constraints and …
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A mixed computational algorithm based on the updated Lagrangian description for plane elastic contact problems
… the satisfaction of stress equilibrium and contact boundary conditions more exactly than in the displacement finite element model. Two algorithms are discussed for the analysis of a thin, uniformly loaded plate with a circular hole in contact with a pin. The different algorithms consider the …
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Uma aplicação do método dos elementos de contorno a problemas de contacto
… evaluation of 2-D plane strain or plane stress contact problems between two elastic bodies with frictional forces on the contact surfaces, by means of the boundary element method. The half-plane fundamental solution is implemented in order to efficiently improve the solution of contact problems …
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A Stabilized Finite Element Formulation of Non-Smooth Contact
The computational modeling of many engineering problems using the Finite Element method involves the modeling of two or more bodies that meet through an interface. The interface can be physical, as in multi-physics and contact problems, or purely numerical, as in the coupling of non-conforming …
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Age and IQ as Potential Moderators in the Relation Among Endopheonotypes and Expressed Behaviors in Children With Autism Spectrum Disorder
… out behaviors, social insight deficits, social contact problems, anxious/rigid behaviors, and stereotypical behaviors) that are commonly found in children with ASD. In addition, this study examined whether these associations are modified by age or IQ. Participants consisted of 29 children (ages …
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High Order Finite Element Solution of Elastohydrodynamic Lubrication Problems
… Elastohydrodynamic Lubrication (EHL) problems (line contact and point contact). This thesis provides an introduction to elastohydrodynamic lubrication, including some history, and a description of the underlying mathematical model which is based upon a thin film approximation and a …
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A coupled contact-mechanics computational model for studying deformable human-artifact contact
… of the suit and human resulting from contact interactions is developed. This thesis details the development and validation of a coupled contact-mechanics solver architecture for use in studying the effects of human-artifact interaction, particularly with respect to pressurized softgood …
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