CAEfatigue is a powerful tool to conduct a durability analysis on a structure whether it is in the time or fervency domain.
It also has the capability to:
These capabilities are discussed in more detail below.
Solving fatigue an a vibrating structure using single and multiple PSD inputs
The CFV-BASE module is designed to provide the user with both the random response results and the fatigue results from a structure undergoing loading input from a single random PSD with or without additional loading from deterministic inputs and mean offsets. Response outputs includes mean stress, RMS stress or strain, mean stress plus RMS stress or strain, moments, zero crossings, peaks per second and irregularity factor. Fatigue results including damage, life and margin of safety from a single random input.
The loading inputs needed for CFV can come from Optistruct, Nastran, Ansys or Abaqus generated from (virtually) any size model. Examples of inputs are simultaneous wide band and narrow band inputs, wide band random and swept sine inputs, wide band random and deterministic inputs, wide band and swept narrow band inputs, swept narrow band or swept sine wave.
The CFV-MULTI module offers all the input / output options from CFV-BASE plus the ability to use multiple random input PSDs (and cross PSDs) with mean offsets i.e., data from a test rig with multiple events and multiple channels per event plus a mean offset. This module offers random response and S-N or E-N fatigue results generated from the multiple simultaneous correlated load inputs, with any number of DOF’s, inputs, events and frequencies. Coupled with CAEfatigue RANDOM, CFV-MULTI becomes a powerful tool for understanding output results for displacement, velocity, acceleration, force, stress, strain and fatigue (damage / life).
*CFS is currently under development and is scheduled to be released in Q2 2019 or sooner.