Spelling suggestions: "subject:"bainite Element aanalysis"" "subject:"bainite Element 2analysis""
1 
Mathematical modelling of the diffusion of liquids in stressed polymersShanati, Shafic January 1994 (has links)
No description available.

2 
Observations on the design of rectangular storage tanksTimmins, David January 1996 (has links)
No description available.

3 
Lagrange multiplier method for contact and friction : implementation and theoryEnglish, Russell Gary January 1993 (has links)
No description available.

4 
Hierarchical strategy for rapid finite element analysisVarghese, Julian 30 September 2004 (has links)
A new methodology is introduced where the natural hierarchical character of model descriptions and simulation results are exploited to expedite analysis of problems. The philosophy and the different concepts involved are illustrated by implementing the strategy to solve some practical problems. The end result was a mix of mechanics, welldesigned data structures and software interfaces that forms a rapid analysis environment. This can be very advantageous for cases where a sequence of analyses is required because of safety concerns or cost. When designing a structure, it is common to make frequent modifications to the model during the process. In such cases, the ability to use data from different models within the same analysis environment becomes a major advantage. The proposed system's forte is its hierarchical framework that allows models to communicate with each other and share information with one another. This makes it ideal for global local analyses where solutions from a global model are used to derive the boundary conditions for the local model. The system was also used to conduct a micro mechanical analysis on unidirectional composites that have a nonuniform spatial distribution of the fibers. The hierarchical strategy is not tied to any specific methodology and can be adapted to solve problem using different technologies. This allows the strategy to be used across multiple length scales and governing equations.

5 
3D nonlinear mixed finiteelement analysis of RC beams and plates with and without FRP reinforcementHoque, Mohammad M. 05 April 2006 (has links)
Three 3D nonlinear finiteelement (FE) models are developed to study the behavior of concrete beams and plates with and without externally reinforcement of fibre reinforced polymer (FRP). Ramtekkar’s mixed layerwise 3 dimensional (3D) 18node FE model (108 degreesoffreedom, DOFs) is modified to accommodate the nonlinear concrete and elastoplastic steel behaviour. Saenz’s stressstrain equation is used for material nonlinearity of concrete. As in any 3D mixed FE analysis, the run time using the model can be computationally expensive. Two additional layerwise 18node FE models: Displacement FE model (54 DOF) and transitional FE model (81 DOF) are developed. The displacement FE model is based on purely displacement field, i.e. only displacement components are enforced throughout the thickness of the structures. The transitional FE model has six DOF (three displacement components in the coordinate axis direction and three transverse stress components  where z is the thickness direction) per node in the upper surface and only three DOF (three displacement components in the coordinate axis direction) per node in the bottom surface.The analysis of reinforced concrete (RC) beam strengthened with FRP and composite plate using these models are verified against the experimental results and the results from the commercial software, ANSYS respectively. Several parametric studies are done on composite RC beam and composite plate. / May 2006

6 
On simple and accurate finite element models for nonlinear bending analysis of beams and platesUrthaler Lapeira, Yetzirah Yksya 17 September 2007 (has links)
This study is concerned with the development of simple and accurate alternative finite element models to displacement finite element models for geometrically
nonlinear bending analysis of beams and plates. First, a unified corotational beam
finite element that incorporates the kinematics of classical as well as refined beam
theories, including the Timoshenko and Reddy beam theories, is developed in a single
finite element. The governing equations are written in a "corotational" local frame
that rotates with the element and with respect to which the standard linear engineering relations between strains and internal forces are valid. The element is based
on Lagrange interpolation of the axial displacement, Hermite cubic interpolation of
the transverse displacement, and related quadratic interpolation of the rotation, and
it does not experience shear locking. The model is verified by comparisons with exact and/or approximate solutions available in the literature. Very good agreement is
found in all cases.
Next, a finite element model is developed using a mixed formulation of the firstorder shear deformation theory of laminated composite plates. A ptype Lagrangian
basis is used to approximate the nodal degrees of freedom that consist of three displacements, two rotations, and three moment resultants. The geometric nonlinearity,
in the sense of the von KÃÂµarman, is included in the plate theory. The mixed plate
element developed herein is employed in the linear and nonlinear bending analysis of a variety of layered composite rectangular plates. The effects of transverse
shear deformation, material anisotropy, and bendingstretching coupling on deflections and stresses are investigated. The predictive capability of the present model
is demonstrated by comparison with analytical, experimental, and numerical solutions available in the literature. The model provides an accurate prediction of the
global bending response of thin and moderately thick plates subjected to moderate
and moderately large rotations. The inclusion of the bending moments at the nodes
results in increased accuracy in the computation of stresses over those determined by
conventional displacementbased finite element models. The many results presented
here for geometrically nonlinear bending analysis of beams and plates should serve as
reference for future investigations.

7 
Hierarchical strategy for rapid finite element analysisVarghese, Julian 30 September 2004 (has links)
A new methodology is introduced where the natural hierarchical character of model descriptions and simulation results are exploited to expedite analysis of problems. The philosophy and the different concepts involved are illustrated by implementing the strategy to solve some practical problems. The end result was a mix of mechanics, welldesigned data structures and software interfaces that forms a rapid analysis environment. This can be very advantageous for cases where a sequence of analyses is required because of safety concerns or cost. When designing a structure, it is common to make frequent modifications to the model during the process. In such cases, the ability to use data from different models within the same analysis environment becomes a major advantage. The proposed system's forte is its hierarchical framework that allows models to communicate with each other and share information with one another. This makes it ideal for global local analyses where solutions from a global model are used to derive the boundary conditions for the local model. The system was also used to conduct a micro mechanical analysis on unidirectional composites that have a nonuniform spatial distribution of the fibers. The hierarchical strategy is not tied to any specific methodology and can be adapted to solve problem using different technologies. This allows the strategy to be used across multiple length scales and governing equations.

8 
3D nonlinear mixed finiteelement analysis of RC beams and plates with and without FRP reinforcementHoque, Mohammad M. 05 April 2006 (has links)
Three 3D nonlinear finiteelement (FE) models are developed to study the behavior of concrete beams and plates with and without externally reinforcement of fibre reinforced polymer (FRP). Ramtekkar’s mixed layerwise 3 dimensional (3D) 18node FE model (108 degreesoffreedom, DOFs) is modified to accommodate the nonlinear concrete and elastoplastic steel behaviour. Saenz’s stressstrain equation is used for material nonlinearity of concrete. As in any 3D mixed FE analysis, the run time using the model can be computationally expensive. Two additional layerwise 18node FE models: Displacement FE model (54 DOF) and transitional FE model (81 DOF) are developed. The displacement FE model is based on purely displacement field, i.e. only displacement components are enforced throughout the thickness of the structures. The transitional FE model has six DOF (three displacement components in the coordinate axis direction and three transverse stress components  where z is the thickness direction) per node in the upper surface and only three DOF (three displacement components in the coordinate axis direction) per node in the bottom surface.The analysis of reinforced concrete (RC) beam strengthened with FRP and composite plate using these models are verified against the experimental results and the results from the commercial software, ANSYS respectively. Several parametric studies are done on composite RC beam and composite plate.

9 
Elementbyelement methods in transient analysisWong, SW. January 1987 (has links)
No description available.

10 
3D nonlinear mixed finiteelement analysis of RC beams and plates with and without FRP reinforcementHoque, Mohammad M. 05 April 2006 (has links)
Three 3D nonlinear finiteelement (FE) models are developed to study the behavior of concrete beams and plates with and without externally reinforcement of fibre reinforced polymer (FRP). Ramtekkar’s mixed layerwise 3 dimensional (3D) 18node FE model (108 degreesoffreedom, DOFs) is modified to accommodate the nonlinear concrete and elastoplastic steel behaviour. Saenz’s stressstrain equation is used for material nonlinearity of concrete. As in any 3D mixed FE analysis, the run time using the model can be computationally expensive. Two additional layerwise 18node FE models: Displacement FE model (54 DOF) and transitional FE model (81 DOF) are developed. The displacement FE model is based on purely displacement field, i.e. only displacement components are enforced throughout the thickness of the structures. The transitional FE model has six DOF (three displacement components in the coordinate axis direction and three transverse stress components  where z is the thickness direction) per node in the upper surface and only three DOF (three displacement components in the coordinate axis direction) per node in the bottom surface.The analysis of reinforced concrete (RC) beam strengthened with FRP and composite plate using these models are verified against the experimental results and the results from the commercial software, ANSYS respectively. Several parametric studies are done on composite RC beam and composite plate.

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