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# Gravity Load Command in Solid Edge

Retired

Considering the fact that all products (with a few rather obvious exceptions) will be used here on Earth, gravity will be a consideration in virtually all of your designs. Now in Solid Edge Generative Design, you can apply general gravity loads to the body in the design space during structural optimization thanks to a new Gravity Load command available in Solid Edge 2019. This helps determine if your part will be able to withstand gravitational forces. We’ll be examining the command in this post today.

Applying a load as a boundary condition in a generative design study is part of the larger generative design workflow in Solid Edge. Generative Design brings topology optimization to Solid Edge. Designers define a specific material, design space, permissible loads and constraints and a target weight, and the software automatically computes the geometric solution. These results can be immediately manufactured on 3D printers, or further refined in Solid Edge for traditional manufacturing.

# How to Use Gravity Load in Solid Edge

When using gravity loads, you can define which gravitational forces are being applied to ensure that your resultant part can withstand gravity, along with other loads, for the specified boundary conditions.

Use the Generative Design tab→Loads group→Gravity command  to apply a gravity load to the entire body selected as the design space.

# Gravity Load Inputs

A gravity load is a general translational acceleration load. The gravity load is calculated by multiplying the specified acceleration of gravity by the model mass.

Gravity loads require the following information:

• Material density—You can set this in the Material Table. The mass is calculated from the density of the material selected for the model.
• Geometry—Automatically applied to the entire model.
• Load Direction and Value—The gravity load symbol is displayed at the center of mass of the design space. The default is to apply gravity in the negative Z direction of the part, and the gravity load is shown in the Az input box. You can reverse the gravity direction using the Flipbutton on the command bar. This also changes the Az value from negative to positive.

If the part is oriented so that gravity will be applied along the X axis, then enter the gravity value in the Ax box, instead of the Az box. If the part is oriented such that gravity will be applied at an XY angle from the base coordinate system, then enter the gravity value in the Ax and Ay boxes to define that angle.

# How to Edit the Gravity Load

Because gravity is applied to the entire design space, it is listed in the Generative Design pane in the general study definition area as either Gravity (Undefined) or Gravity (Defined), rather than being listed under the Loads collector.

To edit a defined gravity load, you can double-click the Gravity (Defined) entry in the Generative Design pane, or simply select the Gravity command again.

If you want to remove a gravity load, right-click the Gravity (Defined) entry and choose Delete. This also resets the label to its initial Gravity (Undefined) state.

Stay tuned to learn more about what's new in Solid Edge 2019 as we continue our series.

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