# 46 CFR Part 154, Appendix A to Part 154 - Equivalent Stress

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Appendix A to Part 154—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.τ

*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.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]

**Title 46 published on 2013-10-01**

no entries appear in the Federal Register **after** this date.