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To Apply Geometric Constraints | Inventor | Autodesk Knowledge Network – Geometric Constraints
Structural constraints restrict or limit the displacement of the model. Add constraints to mimic environmental conditions. For static simulations, remove all rigid body modes free translational and rotational movement of the bodies.
To do so, fix a face, for example, or combine partial constraints on faces, edges, or vertices. If you need assistance, activate the Simulation Guide. After you run the simulation, you can edit or suppress constraints and then rerun the simulation to see the effect of the changes.
Reaction forces, for the Fixed, Pin, and Frictionless constraints display based on the selected constraint. Reaction Moment Displays the total magnitude of the reaction moment about the constraint centroid, or about the x-axis, y-axis, or z-axis of the constraint centroid. In the browser, right-click the Constraints node, and click the constraint type. Select the appropriate input for the constraint type. You can select more than one input only if the selections are of the same type, such as face, edge, or vertex.
In the browser, Constraint instances are child nodes of the Constraints node. Use the node context menu to: Edit the constraint using the dialog box that displays, or double-click a constraint node. View reaction forces. Values are zero until you run a simulation. Suppress or delete the constraint. Copy and Paste between simulations within the same document. Note: You cannot exclude part-part contact areas from constraints applied to faces containing the contact.
Parent topic: About Stress Analysis.
Autodesk inventor 2018 constraints free
More complex settings are available in the dialog boxes. Constraints are defined in the global coordinate system. The available constraint types are:.
Apply fixed constraint when no movement rotation and displacement is allowed on beam or node. To add a structural fixed, pinned, floating, or custom constraint:. Custom constraint enables you to customize all parameters of the constraint position, orientation, degrees of freedom for rotation and displacement on beam or node. To set the custom constraint values, use the Custom Constraint dialog box, or drag the grips in the graphics window.
Heads Up Display input is not available. When you select Fixed option, there is no displacement allowed in this direction. Click here to read more about types of displacement. When you select Fixed option, there is no rotation allowed in this direction. Click here to read more about types of rotation.
The available constraint types are: Access Constraint Type Used to Note: You can also right-click the Constraints node in the browser and select the appropriate constraint type from the context menu.
To apply a custom constraint Custom constraint enables you to customize all parameters of the constraint position, orientation, degrees of freedom for rotation and displacement on beam or node. Parent topic: Prepare for analysis.
Apply pinned constraint when no displacement and free rotation is allowed on beam or node. Apply floating pinned constraint when free rotation and free displacement in one plane is allowed on beam or node. Apply custom constraint to specify your own degrees of freedom of displacement and rotation on beam or node.
On the ribbon, click Frame Analysis tab Constraints panel Custom. Select beam or node to position the constraint. Using the Absolute or Relative check boxes, select how you want to set the offset value. Set the Offset value. Set angles of constraint rotation about X, Y, and Z axes. Values are defined in the global coordinate system. Specify the displacement. Use the drop-down menus to specify the degrees of freedom for X, Y, and Z axes. Specify the rotation.
Place Insert constraints in assemblies | Inventor | Autodesk Knowledge Network
Assembly constraints establish the orientation of the components in the assembly and simulate mechanical relationships between components. For example, you can:. Each time you update the assembly, the assembly constraints are enforced. Each unconstrained component in an assembly has six degrees of freedom DOF. It can move along or rotate about each of the X, Y, and Z axes. The ability to move along X, Y, and Z axes is called translational freedom. The ability to rotate around the axes is called rotational freedom.
Whenever you apply a constraint to a component in an assembly, you remove one or more degrees of freedom. A component is fully constrained when all degrees of freedom DOF are removed. You are not required to constrain completely any component in an assembly in Autodesk Inventor. To verify the DOF of components in an assembly:. For example, you can: Mate two planes. Specify that cylindrical features on two parts remain concentric. Constrain a spherical face on one component to remain tangent to a planar face on another component.
Degrees of freedom Each unconstrained component in an assembly has six degrees of freedom DOF. Drag a component in the graphics window. Other components in the assembly move, based on existing constraints. Parent topic: Assemblies.
Autodesk inventor 2018 constraints free
Arc and line endpoints are free to move along the extents of the radius or length. Fixed endpoints or midpoints allow rotation of lines or arcs about the points. Position, size, and orientation of a circle or ellipse are fixed. Apply a Parallel or Perpendicular Constraint. Note: To add a perpendicular constraint to a spline, the constraint must be applied endpoint to endpoint between the spline and the other curve.
Apply an Equal Constraint. Apply a Symmetric Constraint 2D Sketches. When applying symmetric constraints, keep in mind: If you delete the line of symmetry, the symmetric constraints are also deleted.
Selected lines and arcs are constrained about a line to create a symmetrical shape. Apply pinned constraint when no displacement and free rotation is allowed on beam or node. Apply floating pinned constraint when free rotation and free displacement in one plane is allowed on beam or node. Apply custom constraint to specify your own degrees of freedom of displacement and rotation on beam or node.
On the ribbon, click Frame Analysis tab Constraints panel Custom. Select beam or node to position the constraint. Check Minimum and enter a value to specify the minimum limit position. Check Use Offset As Resting Position and enter the required value in the Offset value box to specify the resting position.
If Show Preview is selected, observe the effects of the applied constraint. If either component is adaptive, constraints are not previewed. Do one of the following: Click OK to create the constraint and close the dialog box.
Click Apply and continue to place constraints. Select an arc or circle edge on the component that changes position. Add a row for each unique combination of precision level and tolerance range. The ways in which sketch geometry can change size or shape are called degrees of freedom. For example, a circle has two degrees of freedom: its center and its radius.
An arc has four degrees of freedom: center, radius, and end points. If you eliminate all degrees of freedom by applying constraints or dimensions, the sketch is fully constrained.
If any degrees of freedom remain unsolved, the sketch is under-constrained. As you create geometry, Autodesk Inventor displays Degrees of Freedom glyphs to illustrate whether geometry is unconstrained, partially constrained, or fully constrained. As constraints are applied to the geometry and degrees of freedom eliminated, the glyphs disappear. Conversely, as constraints are deleted and degrees of freedom added, the glyphs appear.
Use the degrees of freedom glyphs to help you determine how to apply geometric and dimensional constraints to your sketch geometry. Autodesk Inventor uses constraints in two primary ways: 2D and 3D sketch constraints control geometry within sketches Assembly constraints and joints establish relationships between components in an assembly that control position and behavior.
Geometric Constraints. Select the first line and then select the second reference line where to make the perpendicular as shown in pic Select the line which is at an angle to make the horizontal to the horizontal axis as shown in pic Select the line which is at an angle to make the vertical to the vertical axis as shown in pic Tangent constraint allows us to make the line or circle tangent to the circle or line as shown in pic