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What is the difference between "shell" and a "membrane" in terms of loading as applied to structures?

I think shell can take transverse loading whereas membrane can take only in-plane loading. Is that correct?

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Question added by Jaffar Sadiq Ahmed Basha , Engineer , Tech Mahindra
Date Posted: 2013/10/22
Sina Tehrani
by Sina Tehrani , Civil Project Engineer , Downer

In brief I can answer you like this:

 

Membranes have in-plane stiffness : like a shear wall

Plates are elements with out-plane stiffness like a concrete slab (though we model slabs as membranes in Structural Analysis programs like Etabs to solve the problem easire)

Shells are a combination of both like a retaining wall

 

membranes only transfer in-plane forces and perpendicular moments as results of in-plane tensions and compressions. it has SDOF in rotation and2 DOF in displacement.

membrane

 

 

Plates can only endure Moments and lateral out-plane shears. it has SDOF in displacement and2 DOF in rotation.

 

plates

 

Shell = Plate + Membrane

it has6 Degree Of Freedom.

shell forces and moments

 

 

 

Vote it up if you find my answer useful

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