DARBURY LIFTING LUG PROGRAM DOWNLOAD FREE
The Factor of Safety FS is: The overall ultimate load must be compared to the applied force to determine the factor of safety:. Transverse Force, F tr: You can later upload this file to pick back up where you left off. The design ultimate load for a transversely loaded lug is the minimum of the ultimate lug load and the ultimate bushing load: The current point on the plot is defined by the load ratios in the axial and transverse directions:.
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One of the conditions below must hold true for the pin to be strong in bending: Here are just a few of the calculators that we have to offer:. The Lug Analysis calculator allows for analysis of lifting lugs under axial, transverse, or oblique loading. The ultimate transverse load is calculated as:.
Lug Analysis (Air Force Method)
The overall ultimate load accounts for both the ultimate joint load and the ultimate pin shear load:. Reference Values S tu. The conditions above do not hold true, so the pin is weak in bending. Reference Values P bru.
The table below gives a summary of the results. The design ultimate load for a transversely loaded lug is the minimum of the ultimate lug load and the ultimate bushing load: The critical point is the point at which the load line intersects the failure locus.
For brittle materials, compressive strength is higher than tensile strength. This plot was generated based on the Air Force Manual, Figure bcand d.
Lug Analysis Calculator | MechaniCalc
In this section, the double shear joint strength is calculated which gives the overall strength of the joint accounting for the interactions between the lugs and the pin.
The current point on the plot is defined by the load ratios in the axial and transverse directions:. The load line in the plot extends from the origin through the current point and intersects with the failure locus. Dimensions for the male lug and the female lugs if applicable are given in the following sections. The lug strength components for oblique loading in the applied direction are: The bearing areas between the pin and the lugs are shown in the figure to the right.
The Factor of Safety FS is:. You can later upload this file to pick back up where you left off. Looking for Other Calculators? The design ultimate load for an axially loaded lug is the minimum of the ultimate bearing load, the ultimate bushing load, and the ultimate net-section load:. Note that pure axial loading and pure transverse loading are special cases of oblique loading where only one load component is non-zero.
The axes of the plot are load ratios, which relate the applied load to the lug strength. This is the overall strength of the joint, accounting for the male lug, the two female lugs, and the pin.
Lifting lug calculation.xls
The ultimate bearing load is calculated as:. This point gives the load ratios at which the lug fails.
Lug Liftihg, t 2: Your browser is out of date. Reference Values P tru. Double Shear Joint Strength In this section, the double shear joint strength is calculated oug gives the overall strength of the joint accounting for the interactions between the lugs and the pin. The ultimate transverse load is calculated as: Male Inner Lug Inputs: The net-section ultimate load is calculated as:. Reference Values P u. For a strong pin, the pin bending does not affect the joint strength and the ultimate joint load is equal to the nominal ultimate joint load:.