The Basic Incremental Failure (BIF) model provides a lightweight, history‑based ductile failure approach for LS‑DYNA when only minimal test data—often a single tensile curve—is available. It incorporates stress‑state dependence, strain‑rate scaling, mesh‑size regularization, and incremental damage, offering more realistic fracture predictions than simple FAIL or MXEPS criteria while avoiding the complexity of GISSMO or DIEM. Failure curves for shells and failure surfaces for solids are generated automatically, with calibration reduced to adjusting a single parameter, EPSF. Benchmarks show improved correlation in tensile, bending, and crash‑like cases at roughly half the computational cost of GISSMO.
