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Thermal stress in multilayer reinforced composite beams

thread327-488789

Thermal stress in multilayer reinforced composite beams

RE: Thermal stress in multilayer reinforced composite beams

Probably the left two. But what are the materials?

RE: Thermal stress in multilayer reinforced composite beams

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

RE: Thermal stress in multilayer reinforced composite beams

And the material CTE’s?

RE: Thermal stress in multilayer reinforced composite beams

(OP)
fiber has higher CTE.

RE: Thermal stress in multilayer reinforced composite beams

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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