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shreddinglicks
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Homework Statement
An elastic membrane in the x1x2-plane with boundary circle x1^2 + x2^2 = 1 is stretched so that point P(x1,x2) goes over into point Q(y1,y2) such that y = Ax with A = 3/2* [2 1 ; 1 2] find the principal directions and the corresponding factors of extension or contraction of the elastic deformation. Sketch the shape of the deformed membrane.
Homework Equations
det(A-lambda*I) = 0
(A-lambda*I)x = 0
The Attempt at a Solution
Using det(A-lambda*I) = 0
I got
lambda = 4.5
lambda = 0
Using (A-lambda*I)x = 0
I got eigenvectors
x2*[1;1]
x2*[-.5;1]
What do I do next?
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