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Showing 1 to 19 of 19 for “"finite element codes"”.
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The Development and Application of a Trapezoidal Shear Panel for Use in Finite Element Codes
… shear panel used in structural analysis codes to model aircraft structures. An equilibrium stress-based element with pure shear resultants on its sides was developed using the principle of complementary virtual work. The internal stress field was derived from a complete polynomial Airy …
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Comparison of nonlinear finite element formulations: application to trusses
… continuum mechanics based incremental nonlinear finite element formulations are reviewed. An introduction to different material response measures suitable for nonlinear analysis, in addition to an overview of the Total and Updated Lagrangian reference frames, serve as the starting point for this …
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A two-dimensional finite element mesh generator with automatic transitioning capability
… designed as a preprocessor for two-dimensional finite element codes is presented. The program generates both triangular and quadrilateral two-dimensional elements and has automatic transitioning capability. The required input is the definition of the boundary of the structure, a measure of the …
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Design of Variable Stiffness Composite Panels for Maximum Strength
… are addressed. Experimental validation of the finite element codes used to model 3D printed composite structures is presented.</p>
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Performance Of Interface Elements In The Finite Element Method
… is to assess the performance of interface elements in the finite element method. Interface elements are implemented in the finite element codes such as MSC.NASTRAN, which is used in this study. Interface elements in MSC.NASTRAN provide a tool to transition between a shell-meshed region to …
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Tools for Multi-Objective and Multi-Disciplinary Optimization in Naval Ship Design
… Experiments simplify and speed up the process. Finite element codes such as MAESTRO improve the accuracy of the ship synthesis models which in turn lower costs later in the design process. A case study of an Advanced Logistics Delivery Ship (ALDV) is performed to asses the use of RSM and DOE …
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Constitutive modelling and finite element analysis in geomechanics
… implementation and use in large general purpose finite element codes. As a preliminary exercise, a state-of-the-art plasticity cap model was developed in order to provide a basis for comparison with the new model. Existing cap models were shown to exhibit certain inconsistencies associated with …
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An efficient technique for structural reliability with applications
… is performed using numerical techniques such as finite elements. The technique has proven to be efficient because it can handle problems with large numbers of design variables and correlated as well as nonnormal random variables. When compared with analytical results, the method has shown …
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Investigation of the Stability of Metallic/Composited-Cased Solid Propellant Rocket Motors under External Pressure
… shear interactions. A set of displacement-based finite element codes have been formulated to determine critical buckling loads and mode shapes. The effect of initial imperfections on the structural responses are also incorporated in the formulations. A variety of numerical examples are …
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CFD Simulations of an Air-Conditioned Radiological Materials Staging Room: Comparison Between COMSOL and ANSYS Codes
… temperatures of the packages using two CFD codes: ANSYS/Fluent finite volume and COMSOL finite element codes. The simulated facility contains 640 heat-generating 9975 packages, arranged in four rows and eight levels, equipped with a ventilation system and lighting. The outer walls of the …
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Modeling of Residual Stress in Thick Section Weldments
… An uncoupled, nonlinear, thermo-mechanical finite element model was developed for analyzing thermal related welding problems. To reduce the computational and data storage requirements, a two-dimensional finite element model was developed and compared to the three-dimensional model. …
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Concrete crack width under combined reinforcement corrosion and applied load
… In the numerical method, an interfacial element has been developed to predict concrete crack width under combined effects based on a cohesive crack model in conjunction with finite element codes. To help accurate prediction of crack width in the numerical method, a realistic constitutive …
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A control volume unstructured grid approach to the solution of the elastic stress-strain equations
… of solving stress-strain problems is to use a finite element approach which yields a set of linear equations relating loads to displacements. This approach works very well and can also deal well with temperature loading, but becomes problematic when flow and change of phase are included in a …
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Global/local analysis of laminated panels with cutouts and cracks
… scenario is also true for many research-oriented finite element codes which have a limited element library or have a problem-size limit because of the use of a memory-resident equation solver. This study focuses on the development of a simple and accurate global/local method for calculating the …
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Reliability and failure analysis of composite beams and plates containing stress concentrations
… have to be employed. For this purpose, the finite element method is extensively used. For stress analysis of isotropic beams under four point bending and composite plates under in-plane loading, a finite element analysis program F2DELAST based on two-dimensional elasticity theory was …
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Modellierung und Numerik zeitharmonischer Wirbelstromprobleme in 3D
… ist sowohl die Entwicklung eines effizienten Finite-Element-Codes unter Verwendung adaptiver Mehrgitterverfahren als auch die Entwicklung einer Randelementmethode für Impedanzrandbedingungen. Das zugrundeliegende Wirbelstrommodell ist eine Näherung der Maxwellschen Gleichungen und beschreibt …
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Simulating Blast Effects In Steel Skeletal Structures
… application of sophisticated commercial finite element codes and internally developed software tools. The contribution to the state of the art is the development of a new approach to constitutive modeling, within a computationally expedient framework, which enables the consideration of …
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Vibration Analysis and Control of an Inflatable Toroidal Satellite Component Using Piezoelectric Actuators and Sensors
… different approximate theories and commercial finite element codes. The results suggest that the use of an accurate shell theory and pressure effect is very important for the vibration analysis of an inflated torus. Next, the modal behaviors of piezoelectric actuator and sensor are analyzed. A …
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Trim Angle of Attack of Flexible Wings Using Non-Linear Aerodynamics
… Fluid Dynamics for fluids and detailed finite element models for structures) at the preliminary design stage. A necessary step at that stage is to calculate the wing angle-of-attack at which the wing will generate the desired lift for the specific flight maneuver. Determination of this …