import type { PressFitInput, PressFitResult } from './types.js';
/**
 * Calculate press-fit (interference fit) parameters.
 *
 * Formulas:
 * - Interference: delta = d_shaft - d_hole
 * - Interface pressure: p = delta * E / (d * C)
 *   where C = (d_o^2 + d^2)/(d_o^2 - d^2) + 1
 * - Assembly force: F = pi * d * L * p * mu
 * - Holding torque: T = pi * d^2 * L * p * mu / 2
 *
 * Model assumptions baked into the `+ 1` constant (see C-factor below):
 * both members are the **same material** (a single E, nu is supplied) and the
 * shaft is **solid** (inner radius = 0). Under these two assumptions Shigley's
 * general interference equation collapses so that the shaft's own compression
 * (p*d/E)(1 - nu) adds to the hub's expansion (p*d/E)[(d_o^2+d^2)/(d_o^2-d^2) + nu],
 * and the two nu terms cancel, leaving a net `+ 1`. A rigid-shaft model (hub
 * deforms alone) would instead keep `+ nu`; using it here — where the shaft is
 * the same material and therefore also yields — overstates p by ~36% for typical
 * steel-on-steel fits. Supporting a hollow shaft or a true dissimilar-material
 * pair (separate E_shaft/E_hub) would require replacing this branch, not tuning
 * the constant.
 *
 * A consequence of the nu cancellation: for this same-material, solid-shaft model
 * the interface pressure and every derived stress are **independent of Poisson's
 * ratio**. `input.poissonRatio` is therefore accepted (it belongs to the material
 * spec and the deferred dissimilar-material model will need it) but intentionally
 * not read here — changing it does not change the result.
 *
 * Reference: Shigley's Mechanical Engineering Design
 */
export declare function pressFit(input: PressFitInput): PressFitResult;
//# sourceMappingURL=pressFit.d.ts.map