Calculation of eyelets

Input data
	Eyelet head radius r₁	mm	(see Attachment 1)
	Hole center height h	mm
	Hole diameter d	mm
	Eyelet thickness s₁	mm
	Eyelet connection weld thickness a₁	mm
	Shackle bolt diameter d_s	mm
	Reinforcing ring thickness s_R	mm	(two rings welded at both sides)
	Reinforcing ring outer diameter D_R	mm	(two rings welded at both sides)
	Vessel shell thickness s_e	mm
	Reinforcing plate thickness s₂	mm
	Reinforcing plate corner radius r₂	mm
	Reinforcing plate width b	mm
	Reinforcing plate length l	mm

	Tension load F_e	kN
	Inclination angle β	°
	Stress load horizontal component F_x	kN
	Stress load vertical component F_y	kN

	Elastic modulus E	N/mm²
	Allowable pressure according to Hertz p_o all	N/mm²
	Allowable stress in the eyelet σ_all	N/mm²
	Allowable stress in connection weld σ_aV all	N/mm²



Calculation
	Pressure according to Hertz p_o	N/mm²
	Maximum stress due to bending load σ_M	N/mm²
	Maximum stress due to tension load σ_F	N/mm²
	Maximum stress in the eyelet at the hole σ_tot	N/mm²
	Maximum stress in eylet at weld due to bending load σ_M	N/mm²
	Maximum stress in eylet at weld due to tension load σ_F	N/mm²
	Maximum shear stress in eylet at weld τ	N/mm²
	Maximum stress in eylet at weld σ_⊥	N/mm²
	Maximum stress in connection weld due to bending load σ_aM	N/mm²
	Maximum stress in connection weld due to tension load σ_aF	N/mm²
	Maximum shear stress in connection weld τ_a	N/mm²
	Maximum stress in connection weld σ_aV	N/mm²

Results
	Pressure according to Hertz	p_o = N/mm²	p_o all = N/mm²
	Maximum stress in the eyelet at the hole	σ_tot = N/mm²	σ_all = N/mm²
	Maximum stress in eylet at weld	σ_⊥ = N/mm²	σ_all = N/mm²
	Maximum stress in connection weld	σ_aV = N/mm²	σ_aV all = N/mm²