Tensor/Matrix multiplication problem

Question

William White 2015-7-18

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/230354-tensor-matrix-multiplication-problem

回答： William White 2015-7-18

采纳的回答： William White

The shear stress at a point can be written

(m•sigma)•n

where m is the unit vector parallel to the slip plane; n is the unit vector normal and sigma is the stress tensor.

If the problem is two-dimensional the stress tensor is 2x2; i.e

[ xx xy ; xy yy]

If the problem is contrived (to begin with) so that stress is at right angles to the slip plane so that in an x,y co-ordinate frame the slip plane is aligned along the x axis and so the normal is aligned along the y axis how can I set up the code in matlab?

i.e

T = (sigma • m) • n

where T is the shear stress

I am getting repeated errors regarding matrix dimensions.

kind regards W