FEA Basic Definitions for Beginners

Explore how CAE programs bridge CAD and CAM to analyze designs virtually, predict stress, resonance, and thermal behavior, and save time and cost through topology optimization and CFD.

Explains analytical and numerical methods for solving problems, highlighting solving by hand, when analytical methods fail, and using numerical methods in FBA programs to obtain optimum results.

Define material properties and part, create a mesh as a mathematical model, ensure mesh quality, set boundary conditions and loads, run the analysis, and obtain stress values and fatigue life.

Learn how mesh defines geometry from design data, and how three dimensional, two dimensional, and one dimensional elements with nodes affect accuracy, solution time, and quadratic versus linear elements.

Learn how increasing mesh element numbers in finite element analysis improves solution precision up to a convergence point, then yields diminishing returns and longer times, guiding the optimum element choice.

Increase mesh elements in regions with high stresses to obtain more precise solutions, focusing on the reddest regions to create a better mesh and higher accuracy.

Explore mesh quality in finite element analysis, comparing hex and tetra elements, evaluating models, and applying quality criteria to improve mesh in simple to complex geometries.

Explore mesh quality evaluation methods, focusing on skewness and aspect ratio; assess element and orthogonal quality metrics like jacobian ratio to guide re-meshing.

Define contacts in finite element analysis, distinguishing linear and nonlinear types, including pandit contact, bonded, no separation, frictionless, frictional, and rough, with iterative solutions applied for nonlinear analyses.

Master static structural analysis by distinguishing linear elastic and nonlinear dead plastic regions, yield and maximum stress, and deformation to assess part safety.

Explore nonlinear static analysis by examining material, geometry, and contact causes of nonlinearity. Learn how iterative solutions define the nonlinear region and compare bilinear versus multilinear isotropic hardening.

Define stress calculate criteria before computing stress values in static analysis, choosing von Mises, maximum principal stress, or Klomp for brittle materials and maximum shear or Vorm's criteria.

Explore the implicit method used for static structural analysis and how software computes deformation from F = kx via meshing of elasticity and geometry.

Learn the buckling analysis by checking if the applied force times the load multiplier reaches the critical force, indicating buckling.

Explore dynamic analysis as a time-dependent process where forces and boundary conditions evolve with time. Learn dynamic analysis types: modal, transient, harmonic, random vibration, and explicit dynamic for crash scenarios.

Explore fundamental frequency concepts for dynamic analysis, including constant and variable frequencies, amplitude, circular frequency, and how fft converts time-domain signals to frequency-domain spectra.

Understand modal analysis as a dynamic method that determines natural frequencies for resonance, with boundary conditions shaping results and avoiding deformation; use results to choose static, dynamic, or transient analyses.

Explains natural frequency and resonance, showing how objects have an eigenfrequency, how resonance causes high vibration, and how changing loads or parts prevents frequency coincidence to improve durability.

Apply modal analysis to an aircraft wing to identify natural frequencies and visualize mode shapes. Use fixed boundary conditions to simulate how the wing moves under resonance at specific frequencies.

Explore transient analysis as a dynamic, time-dependent method for evaluating a structure's response to time varying loads, including sudden impacts, damping, inertia, and nonlinear analysis.

Explore harmonic analysis and frequency response analysis as dynamic techniques for structures, scanning load frequencies from 0–250 Hz to reveal natural frequencies, deformations, and stress in rotating parts.

Collect sensor data from loads with different frequencies acting on an airplane wing during a real flight, then input this data into computer analysis to perform random vibration analysis.