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FEA stands for Finite Element Analysis. It is a numerical technique used to solve engineering problems by dividing complex structures into smaller parts (elements) and solving them for stresses, strains, and deformations.
Meshing controls the accuracy of your simulation. A finer mesh can produce more accurate results but increases computational cost.
1D (beam, link), 2D (shell, plane), and 3D (solid) elements are commonly used depending on the geometry and analysis type.
A node is a specific point where calculations are performed. An element is a volume, area, or line made up of nodes.
Static structural analysis calculates stresses, displacements, and strains under constant (non-time-varying) loads.
Boundary conditions define constraints and applied loads in the model such as fixed supports, force, pressure, and displacement.
Linear FEA assumes small deformations and constant material properties. Nonlinear FEA accounts for large deformation, plasticity, and contact problems.
Run simulations with different mesh densities. If results don’t change significantly with a finer mesh, the solution is mesh independent.
Stress concentration occurs at sharp corners or holes. Use finer mesh around these areas or redesign to reduce sharp geometry transitions.
Convergence means the solution reaches a stable and accurate state. It ensures your results are reliable.
Contact defines how two parts interact. Common types: bonded, frictional, frictionless, rough, and no separation.
Symmetric boundary conditions exploit geometry or loading symmetry to reduce model size. Asymmetric conditions mean full model behavior is required.
Von Mises stress is a scalar value used to predict yielding of ductile materials. If it exceeds yield strength, the material may fail.
Singularities are non-physical high-stress values (often infinite) at sharp corners or point loads. They don’t represent actual failure but indicate poor modeling or meshing.
Use bolt pretension elements, bonded or contact pairs, and define preload to simulate bolt behavior.
Modal analysis finds natural frequencies and mode shapes of structures. Useful for predicting vibrations and avoiding resonance.
Using the Fatigue Tool, define material fatigue data and load history to estimate life, damage, and factor of safety.
Substructuring simplifies large models by solving a part of the model in detail, using boundary conditions from the global model.
Material models define how materials behave under loads: linear elastic, plastic, hyperelastic, viscoelastic, etc. The choice depends on the application.
First perform thermal analysis to calculate temperature distribution, then link results to structural analysis with thermal expansion coefficients.
Element quality (aspect ratio, skewness, etc.) affects solution accuracy. Poor-quality elements can lead to errors or slow convergence.
Enable “large deflection” (NLGEOM=ON). ANSYS then updates the stiffness matrix based on the deformed shape.
Use transient structural analysis and define load vs. time profiles using tables or functions.
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