1 view (last 30 days)

Hey all,

I am not getting how to explain the problem in which I am stuck. But I wil try to do make it understandable to all with examples where it needs.

I am working on a project to build the user interface(Not GUI). Here User has to give some inputs in the form of matrix(either 1-D or 2-D).

For an example, Contact Area matrix between two materials.

Contact_Area = [ A_1_1 A_1_2 A_1_3; A_2_1 A_2_2 A_2_3; A_3_1 A_3_2 A_3_3] % A_1_1,A_2_2 and so on will be zero always.

% A_1_2 and A_2_1 and so on will be same always

Let's consider we have three square metals, Square metal 1 is inside 2 and 3 is placed in next to 2.

Here Some materials have a maximum of six contact area with other materials.

For an example, If we consider a square metal 1 and this square metal 1 is inside another square metal(2).

Here we can easily say that square metals 1 and 2 have six contact points. Contact areas are Vertical left, vertical right, Horizontal/vertical front, Horizontal/vertical back, Horizontal top, horizontal bottom(Just make an imgination, then you will get it).

And square metals 2 and 3 have just one contact point/node/area, placed next to each other.

The Contact_Area matrix which is there above is fine for one contact point/one contact area. But it is not fine for more than 1 contact areas or points/nodes.

Here are the user-defined function.

function [ L ] = Leitwert_L_1_2(Lambda_1,Lambda_2,A_1_2_H_t, A_1_2_H_b, A_1_2_H_V_f,A_1_2_H_V_ba, A_1_2_V_l, A_1_2_V_r);

% Above function for Square metal 1 and 2

% A_1_2_H_t = Contact area Horizontal top % A_1_2_H_V_ba = Contact area Horizontal/vertical back

% A_1_2_H_b = Contact area Horizontal bottom % A_1_2_V_l = Contact area vertical left

% A_1_2_H_V_f = Contact area Horizontal/vertical front % A_1_2_V_r = Contact area vertical right

function L = Leitwert_L(Lambda_2, Lambda_3, A_2_3 )

% Above function for square metal 2 and 3. Just one contact area. It is fine.

Note: It is just my anticipation formed according to my problem. Why? I have to build the model /write the general code which holds for all model irrespective for matrix size, mateirals and their contact points.

This is my solver.

function LA = Sample_Model

for i=1:n

for j=1:n

LA(i,j) = Leitwert_L_1_2(Lambda(i),Lambda(j), A(i,j), A(i,j),A(i,j),A(i,j),A(i,j),A(i,j)); % bad calling of input arguments here

LA(i,j) = Leitwert_L(Lambda(i), Lambda(j), A(i,j) );

end

x = LA;

disp(x);

end

Here I need to let solver know to take the correct function according to the contact points. Leitwert _L_1_2 for six contact points and Leitwert_L for one. It depends on the model, may be there will be three or two or four, or five contacts points or contact areas.

Here also I need help. calling the right function according to number of contact areas.

My problem start from here, How can I allow user to enter the all the contact areas depending on the contacts points between the materials along with just one contact area.

I got an idea, but I don't know how to implement it in the slover.

My idea is to Buid the cell array of contact area matrix like below.

Contact_Area = { 0 [ A_1_2_H_t A_1_2_H_b; A_1_2_H_V_f A_1_2_H_V_ba; A_1_2_V_l A_1_2_V_r] 0;

[A_1_2_H_t A_1_2_H_b; A_1_2_H_V_f A_1_2_H_V_ba; A_1_2_V_l A_1_2_V_r] 0 A_2_3;

0 A_3_2 0};

%I don't know it is a good idea or not. Bcoz, here I need to give some instruction to the user about entering the input arguments for the materials of more than one contact areaa. Like,

%First row for contact area horizontal top and bottom,

%second row for Contact area Horizontal/vertical front and back

%third row for contact area vertical right and left.

This is headache idea according to me! Need suggestion here as well.

And the implementation like below;

function LA = Sample_Model

for i=1:3

for j=3:

% Here I am not getting how to call all the input arguments of Function Leitwert_L_1_2 at a time.

%for ii = 1:6

% for jj = 1:6

LA(i,j) = Leitwert_L_1_2(Lambda(i),Lambda(j), A{i,j}A(ii,jj), A{i,j}A(ii,jj),A{i,j}A(ii,jj),A{i,j}A(ii,jj),A{i,j}A(ii,jj),A{i,j}A(ii,jj)); % I am not sure about the correctness of this %idea

LA(i,j) = Leitwert_L(Lambda(i), Lambda(j), A(i,j) );

end

x = LA;

disp(x);

end

Lambda is also a matrix, kindly ignore it. Bcoz I didn't included lots of input arguments to avoid the confusion.

I think that I gave proper explantion of my problem with the examples.

If you still need more explantions, I am ready to give

Any suggestions and answers will be much appreciated.

Thanks in advance.

Opportunities for recent engineering grads.

Apply TodayFind the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!
## 1 Comment

## Direct link to this comment

https://se.mathworks.com/matlabcentral/answers/468486-building-of-cell-array-of-n-n#comment_717465

⋮## Direct link to this comment

https://se.mathworks.com/matlabcentral/answers/468486-building-of-cell-array-of-n-n#comment_717465

Sign in to comment.