Force Per Unit Type Guidelines

• If the entity's length or area changes, either through changes you make to the model or through changes Creo Simulate makes during a sensitivity or optimization design study, the total load on the entity changes accordingly.

For example, if you wanted to apply a load of 100 pounds to a 25x25 inch surface using the force per unit method, you would define a load with each 1x1 inch area of the surface seeing 0.16 pound. The cumulative effect of the load is 100 pounds.

In this case, if the surface shrank to 1x1 inch during optimization, the remaining area would still see 0.16 pounds. Thus, although the load on the individual unit of area does not change, the original 100-pound surface load drops to 0.16 pounds.

• Because all modeling data for 2D plane strain models is in terms of per unit depth, you enter the total load on a curve, edge, or 2D shell in terms of the total applied per unit depth.

• For 2D axisymmetric models, a load on a curve, edge, or 2D shell defines what is physically an area load. You enter the amount of such a load as a force per unit area on the surface that the curve, edge, or 2D shell represents.

• A load on a 2D solid defines what is physically a volume load. You enter this type of load as a force per unit volume on the body that the 2D solid represents.

• You can apply a force-per-unit load to multiple surfaces. In this case, Creo Simulate places the same load on each surface unit regardless of the area of the surface.

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