Thermal stress in multilayer reinforced composite beams 1

• Oct 29, 2021

• #2

SWComposites

Aerospace

Nov 6, 2000

3,663

Probably the left two. But what are the materials?

 

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• Oct 29, 2021

• Thread starter
• #3

mdama

Materials

Oct 12, 2018

118

@SWComposites;
Why the left two?
Assume same materials for each layer and a material with a bit elastic modulus higher for the fibers

 

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• Oct 29, 2021

• #4

SWComposites

Aerospace

Nov 6, 2000

3,663

And the material CTE’s?

 

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• Oct 30, 2021

• Thread starter
• #5

mdama

Materials

Oct 12, 2018

118

fiber has higher CTE.

 

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• Oct 30, 2021

1
• #6

Compositepro

Chemical

Oct 22, 2003

7,826

Fiber almost always has lower CTE than the matrix.

Your center picture will have the highest interlaminar stresses due to the double thickness of the plies. It will also warp into a potato chip due to the unbalanced layup. The unidirectional layup has the lowest stress.

 

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