#  Create inextensible layer 

 



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## Select surface to skin

\[[Video: Create skin and assign paper section](http://www.youtube.com/watch?v=S0W1Na4tNj4)\]

We also need to finish modeling the inextensible paper layer. Go back to the merged part and click to create a **Skin.** The software will ask you to select the entity on which it will create the skin. We want to select the surface of the ‘Bottom Layer B’ that we created beforehand, but right now it is buried under other parts. To isolate it, you will have to go to: **Tools → Display Group → Manager.**

 ![image37](/sites/g/files/omnuum4601/files/2024-11/image37.png)

 

 ![image38_crop_0](/sites/g/files/omnuum4601/files/2024-11/image38_crop_0.png)

 

The ‘Part Display Group Manager’ will appear – select Create.

 ![image39_0](/sites/g/files/omnuum4601/files/2024-11/image39_0.png)

 

The ‘Create Display Group’ will now come up – select ‘Surfaces’ and click on the paper surface from the list and then ‘Replace’ and ‘Dismiss’.

 ![image40_crop](/sites/g/files/omnuum4601/files/2024-11/image40_crop.png)

 

This will make only this surface visible in the view. Select the top face of the surface to create the skin.

 ![image41_0](/sites/g/files/omnuum4601/files/2024-11/image41_0.png)

 

## Assign section

While at the Merged part, click on the ‘**Section Assignment**’. There you should already have three sections (all Elastosil). To create a new section for the paper double click the ‘Section Assignment’ and then select the region to be assigned a property by clicking again on the top surface. The ‘Edit Section Assignment’ window will appear where you should select the Paper as the Section. Make sure the Type is ‘Shell, Homogeneous’. Click OK. You have successfully created one more section assignment for the paper.

 ![image42_crop](/sites/g/files/omnuum4601/files/2024-11/image42_crop.png)

 

 ![image43](/sites/g/files/omnuum4601/files/2024-11/image43.png)

 



 

##  Bibliography 

Ilievski et al. (2011) [Soft robotics for chemists.](/publications/soft-robotics-chemists)

Mosadegh et al. (2013) [Pneumatic Networks for Soft Robotics that Actuate Rapidly.](/publications/pneumatic-networks-soft-robotics-actuate-rapidly)

Ogura et al. (2009) [Micro pneumatic curling actuator: Nematode actuator.](/publications/micro-pneumatic-curling-actuator-nematode-actuator)

Polygerinos et al. (2013) [Towards a soft pneumatic glove for hand rehabilitation.](/publications/towards-soft-pneumatic-glove-hand-rehabilitation)

Shepherd et al. (2011) [Multigait soft robot.](/publications/multigait-soft-robot-0)

Sun et al. (2013) [Characterization of silicone rubber based soft pneumatic actuators.](/publications/characterization-silicone-rubber-based-soft-pneumatic-actuators)



 

##  Contributors 

Panagiotis Polygerinos

Bobak Mosadegh

Alexandre Campo