Geometric stress concentration for a grooved shaft in tension
Geometric stress concentration factor Kt = A(r/d)^b for a grooved shaft loaded in tension, from chart-fit coefficients A, b keyed on the D/d ratio (r/d clamped to 0.1 above its 0.3 validity limit, as in the legacy page).
Geometric stress concentration, Kₜ2.2
Coefficient, A1.0107
Coefficient, b-0.33765
Method & references
- Kt = A(r/d)^b for a grooved shaft in tension. Valid for r/d ≤ 0.3.
The computation is a literal port of the original client-side JavaScript from /calculators/e1_3a.htm. Results are verified equal to the original by an automated golden-master test. No formula has been re-derived or “improved”.