What does deflection mean in Structural Mechanics PDE Toolbox?

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Briggs
Briggs 2018-11-27
回答： Briggs 2019-1-3
Let us consider a rectangular structure of length L under strain (x-direction) is elongated by ∆L.
a) Is deflection in this case ∆L, ∆L per L or its bending?
b) If left and right edges of the rectangle are stretched outward, should I use Dirichlet Boundary condition on top and bottom edges or
Neumann Boundary condition on the botton edge.
c) I could export the mesh and solve PDE. How do I plot deflection in horizontal and vertical cuts of the structure?
Thanks in advance.

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采纳的回答

Ravi Kumar
Ravi Kumar 2018-11-27
a) Results output from PDE Toolbox contains Displacements wstruct array ith ux, uy, and uz as fields, these values are displacement from the reference state. These values are sort to (in 1-D) in each direction at each node.
b) You need to decide what BCs represents the physical problem. If you are modelling streaching by pulling of the rectangle with lateral edges free to deflect the just don't assign any BCs on them. In addition you can fix left end and then apply the Dirchlet BC on the right end to simulation pulling, otherwise your model is not fully constrained for rigid motion.
c) Refer to interpolateDisplacement function to get the displacement at you desired locations.
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Briggs
Briggs 2018-11-28
Do you have example file on strain. I saw for stress, clamping etc
Ravi Kumar
Ravi Kumar 2018-11-28
Not sure what you are asking for. You will get strain tensor as an output. You can impose Displacements as BCs to produce required strain.

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Briggs
Briggs 2019-1-3
How to export ux, uy etc.?

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