How rigid-body and flexible-body solvers, tuned to one vehicle's calibrated parameters, compute suspension kinematics, load transfer, and structural stress at rates fast enough to run alongside real driving.
Control arms and steering knuckles are modeled as rigid bodies, since their internal deformation is negligible at road speeds. The chassis frame itself, however, is discretized into a reduced-order flexible-body mesh via component mode synthesis, capturing torsional flex under asymmetric cornering loads that a purely rigid model would miss entirely for this individual vehicle's body-in-white stiffness.
Raw stress tensor output from the flexible-body solver is not directly actionable for a driver or technician. The twin pipeline runs each component's simulated stress history through S-N fatigue curves specific to its material, accumulating a Miner's-rule damage fraction per part and converting it into a single 0-to-100 risk score updated after every drive cycle.