Code of Federal Regulations Title 46. Shipping 46 CFR Pt. 154, App. A—EQUIVALENT STRESS

I. Equivalent stress (σ_c) is calculated by the following formula or another formula specially approved by the Commandant (CG–522) as equivalent to the following:

where:

σ_x=total normal stress in “x” direction.

σ_y=total normal stress in “y” direction.

T_xy=total shear stress in “xy” plane.

II. When the static and dynamic stresses are calculated separately, the total stresses in paragraph I are calculated from the following formulae or another formulae specially approved by the Commandant (CG–522) as equivalent to the following:

III. Each dynamic and static stress is determined from its acceleration component and its hull strain component from hull deflection and torsion.