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46 C.F.R. Appendix A to Part 154—Equivalent Stress

Title 46 - Shipping

Title 46: Shipping
PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES
Subpart E—Operations

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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 (G-MSO) 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 (G-MSO) 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]

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