Step-by-Step Guide: Creating Your First Tensegrity Model in SelfCAD
Tensegrity, a portmanteau of "tensional integrity," is a structural principle that involves a combination of isolated components under tension and compression to create a stable and unique form. In a tensegrity structure, the integrity of the structure is maintained by the balance between the pushing (compression) and pulling (tension) forces.
Key Characteristics of Tensegrity Structures:
- Structural Stability: Tensegrity structures achieve stability through the balance of tension and compression forces.
The elements do not rely on a continuous framework, and the structure maintains its integrity even when individual components are moved or adjusted.
- Flexibility and Adaptability: Tensegrity structures can adapt to external forces and changes in the environment due to their flexible nature.The structure can respond to dynamic conditions without losing stability.
- Lightweight and Efficient: Tensegrity structures are often lightweight because they use minimal material for maximum strength. This efficiency makes them suitable for applications where weight is a critical factor.
- Aesthetic and Artistic Appeal: Tensegrity structures often exhibit visually striking and unconventional designs.
Artists and architects are drawn to the aesthetic possibilities and creative freedom offered by tensegrity principles.
- Applications Across Disciplines: Tensegrity principles are applied in various fields, including architecture, engineering, art installations, and biomechanics. They inspire innovative solutions in design and problem-solving.
Step-by-step Guide of Modeling Tensegrity in SelfCAD
SelfCAD integrates 3D modeling, sculpting, and slicing tools into a single platform, allowing users to create and prepare their designs without switching between different applications.
Open SelfCAD and Create a New Project
Open SelfCAD workspace:
Create Struts (Compression Elements)
Use the Cylinder tool to create the compression elements (struts). On the 3D Shapes, select the Cylinder:
Adjust the dimensions and positions of the cylinder using the parameters on the left side, to form the desired shape as shown below:
On the 3D Shapes, pick the second cylinder and adjust the parameters as shown below:
Select the two cylinders and on the toolbar, go to the Stitch and Scoop tool, and click on the Difference option. Select the second Cylinder (mesh 24) to subtract it.
Enable the operation by clicking on the check mark to finalize:
After the boolean operation, you are left with the model shown above.
On the top panel, go to the Workspace settings and enable all the Plane settings:
Go to the 3D Shapes, and select the Cube:
Adjust the parameters of the cube on the left panel as shown below:
Go to the Deform tools on the toolbar, and select the Bend tool.
On the right panel, activate the Face Selection and then use it to select the highlighted part below:
Use the mouse, click and drag the Gizmos like on the red labeled axis to bend the model in the direction shown below:
Continue bending the model on the x-axis as shown below:
Use the Flatten tool on the Deform category to flatten the top bent tip as shown below:
The next step is to combine the two models. To do this, select the two models, then go to the toolbar and select Stitch and Scoop > Union. Then click on the check mark to finalize the operation:
Then on the top panel, click the Copy icon to make a copy of the combined model:
Use the Move tool and Rotate tool to rotate the copied object and rotate it at 180 to make it upside down as shown below:
Go to the 3D Shapes and select the Cylinder. Adjust the parameters as shown below:
Use the Move tool to move the cylinder and position it as shown below:
The next step is to make copies of the cylinder. Go to the toolbar, and on the Tools select the Copy Offsets tool, and set the Pivot axes. Make the Number of Copies to 2 and click Copy:
Position the cylinders as shown below:
Select all the objects then on the toolbar, go to the Stitch and Scoop> Difference and select all the cylinders to subtract them as shown below:
Finalize the operation:
Activate the Keep Substracted Object option:
Pick another cylinder on the 3D Shapes and set the parameters as shown below:
Select the cylinder and the model. Go to the toolbar and on the Sticth and Scoop tool select the Difference> and subtract the cylinder:
The tensegrity is finally ready:
You can then rotate the tensegrity and use the move tool to separate the two models so that you can print them:
You can then print the model and you will end up with a model as shown below:
SelfCAD's user-friendly interface and comprehensive toolset provide a seamless experience for both beginners and seasoned designers. From the initial setup of the workspace to the fine-tuning of tension and compression elements, SelfCAD offers an integrated environment for bringing tensegrity models to life.
Enjoy powerful modeling, rendering, and 3D printing tools without the steep learning curve.
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