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Rank Deficient Problem 2.40 An engineer's guide to matlab.
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Hora91
Feb 10, 2012, 7:59:12 PM2/10/12
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Basically i have to find the hoop stress.
v1=.4;
v2=.4;
E1=2.1*10^9;
E2=.21*10^9;
U0=.25;
a=5;
b=6.4;
c=8;
k=[1,a^2,0,0;1,b^2,-1,-b^2;-(1+v1),(1-v1)*b^2,(1+v2)*E1/E2,-(1-v2)*(b^2)*E1/E2;0,0,-(1+v2),(1-v2)*c^2]
j=[0;0;0;-U0*E2*c]
[K,J]=meshgrid(k,j)
y=K/J
I should be getting the values with which i am going to calculate the hoop stress, but the values im getting do not make sense. Im getting warning Rank Deficient 1
v1=.4;
v2=.4;
E1=2.1*10^9;
E2=.21*10^9;
U0=.25;
a=5;
b=6.4;
c=8;
k=[1,a^2,0,0;1,b^2,-1,-b^2;-(1+v1),(1-v1)*b^2,(1+v2)*E1/E2,-(1-v2)*(b^2)*E1/E2;0,0,-(1+v2),(1-v2)*c^2]
j=[0;0;0;-U0*E2*c]
[K,J]=meshgrid(k,j)
y=K/J
I should be getting the values with which i am going to calculate the hoop stress, but the values im getting do not make sense. Im getting warning Rank Deficient 1
Steven_Lord
Feb 13, 2012, 10:16:36 AM2/13/12
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"Hora91 " <horacio...@hotmail.com> wrote in message
news:jh4eh0$jfp$1...@newscl01ah.mathworks.com...
passing in a grid _matrix_ as k (and I don't know why you're doing that) K
is in fact rank-deficient; it only has one linearly independent row. All the
rest of the rows are simply one times that row.
Are you sure you're not just supposed to use y = k\j?
--
Steve Lord
sl...@mathworks.com
To contact Technical Support use the Contact Us link on
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