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Engineering blog
How we model composites, crashes, flows and heat, and where machine learning earns its place in the loop. Written by the engineers who run the projects.
How seat transmissibility and the SEAT value are defined, why a SEAT value below one can still amplify the frequency your road supplies, how foam, suspension and occupant apparent mass set the curve, and how a simulation workflow tests a seat before the shaker.
How heat, moisture and air move through a heated and ventilated car seat, how a thermo-physiological manikin turns that into local skin temperature and sensation, what an open EV test says about warm-up energy, and how a simulation workflow tests a layout before you build it.
How seat foam hardness differs from the compression curve a model needs, how foam is calibrated from compression tests, what meat-to-metal simulation adds with the cover and frame, and how a surrogate screens foam and suspension changes without claiming to rate comfort.
How aircraft seat crash simulation reproduces the 14 g and 16 g dynamic conditions of 14 CFR 25.562 and CS 25.562, why the stiffness window and the pre-deformed floor make it hard, what FAA AC 20-146A asks of a validated model, and where AI helps without replacing the physical tests.
How a rear impact loads the neck, what Euro NCAP, IIHS and FMVSS 202a measure, how a BioRID-type dummy model is verified and validated, and how a surrogate with a stated range tunes backset and recliner yield around your explicit solver.
How post weld heat treatment relieves weld residual stress by yield-strength drop and creep, why thick sections and local heating bands are hard, how much stress remains for fracture and fatigue assessment, and how a simulation workflow tests a cycle before you run it.
How to simulate brazing: capillary fill and the joint gap at temperature, furnace temperature uniformity, thermal-expansion mismatch in dissimilar-metal and ceramic-metal joints, residual stress after cooling, and surrogate-assisted screening of trial loads.
How to simulate rotary, linear and friction stir welding: heat from friction and plastic work, flash and material flow with ALE, Eulerian and particle methods, process windows, dissimilar-metal joints, residual stress, and AI surrogates with stated limits.
How to simulate laser and electron beam welds: conduction and keyhole mode, equivalent heat sources versus melt-pool CFD, thin-wall distortion with clamping, joint-gap sensitivity, why FEA does not predict porosity, and surrogate-assisted fit-up screening.
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