WRC-107 - Loads

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Dec 11, 2015


Solve For: When stresses are selected, the analysis will calculate the combined stress from all of the loads entered. When one of the other options is selected, the analysis will set the combined stress to its maximum and back solve for the item selected with the other loads given.

Loads

Radial Load: For both heads and cylinders as hosts, the radial load P is positive if it is inward.

Shear load and overturning moment inputs: For heads, decide arbitrary 1-1 and 2-2 axes that are normal to each other. A shear load V2 acts in the 1-1 direction and causes the M1 moment; a shear load V1 acts in the 2-2 direction and causes the M2 moment. For cylindrical hosts, the axes are the longitudinal and circumferential directions: a positive shear load VC acts in the positive circumferential direction and creates the positive moment MC; the positive shear load VL acts in the positive longitudinal direction and creates the positive moment ML. 

External torsional moment: The torsional load sign is arbitrary and this input is only available for the cylinder, hollow cylinder, and rigid cylinder attachment types.

Use a repad: Select the box to add a reinforcing pad to the design. This option is only available for cylinder and hollow cylinder attachment types.

Use Stress Concentration Factor: WRC-107, Appendix B, identifies this as an adjustment for fatigue considerations at the junction between the host and the attachment. Review WRC-107 for more information.

Repad

Outside Diameter: The component diameter in the new condition.

Thickness: The repad thickness.

Stress Concentration Factors

Fillet radius: The radius of the concavity of the fillet weld between the attachment and the host or pad.

Kn: The stress concentration factor for the membrane stress component based on the weld between the attachment and the host or pad. This value can be found in WRC-107, Appendix B.

Kb: The stress concentration factor for the bending stress component based on the weld between the attachment and the host or pad. This value can be found in Appendix B of WRC-107.

Repad fillet radius: The radius of the concavity of the fillet weld between the pad and the host.

Repad Kn: The stress concentration factor for the membrane stress component based on the weld between the pad and the host. This value can be found in WRC-107, Appendix B.

Repad Kb: The stress concentration factor for the bending stress component based on the weld between the pad and the host. This value can be found in Appendix B of WRC-107.