Appendix A to Part 154 - Equivalent Stress
46:5.0.1.3.15.5.101.40.13 : Appendix A
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: σx = total normal stress in “x”
direction. σy = total normal stress in “y” direction. τxy = 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]