While loop not giving the correct answer
1 view (last 30 days)
Show older comments
Hi All,
the code below is running, HOWEVER the results are incorrect,
My condition in while is running but with wrong numbers, anyone help ??
My while condition is to get the factor results greater than 1 and smaller or equal to 1.5 HOWEVER, the results are factor =
1.0e+03 *
0.0105 2.4436
Please anyone help !!!
clearvars;
close all;
clc;
syms s real;
rr=0;
factor=[0 0]
while all(factor)>1||all(factor)<=1.5
factor=[0 0]
angle_pss=[0 45 -45 30 90;45 -45 45 90 30];
thick_pss=[.125 .15 .25 .5 1;.125 .15 .25 .5 1];
rr=rr+1
% STEP ONE
E1=1.4e3;E2=1.4e3;G12=.53e3;v12=.35;
if rr>length(angle_pss)
return
end
angle=angle_pss(:,rr)';
thickness=thick_pss(:,rr)';
% STEP TWO
S=q_cal(angle,E1,E2,G12,v12);
% STEP THREE
sigma1_c=1500; sigma2_c=246; sigma1_t=1500; sigma2_t=40; tau_12=68;
H1=(1/sigma1_t) - (1/sigma1_c); H11= 1/(sigma1_t*sigma1_c); H2=(1/sigma2_t) - (1/sigma2_c); H22=1/(sigma2_t*sigma2_c); H6=0; H66=1/(tau_12)^2;
H12=-1/2*sqrt(1/(sigma1_t*sigma1_c*sigma2_t*sigma2_c));
% STEP FOUR
[T_zinv,T_z_,Q_tran]=q_tran_cal(angle,S);
% STEP FIVE
Z=h_mid(angle,thickness);
% STEP SIX
[A,B,D]=abd_cal(angle,Z,Q_tran);
% STEP SEVEN
M=[A B;B D];
F=[0;0;0;0;0;10]; % ADD APPLIED FORCES HERE
%F=[N_x;N_y;N_xy;M_x;M_y;M_xy;]
E=M\F; % STRAIN % inv(M)*F
e=E(1:3);
k=E(4:end); % curvature
% STEP EIGHT
[sigmal_t,sigmal_m,sigmal_b]=stress_strain_cal(angle,e,Z,k,Q_tran,thickness,T_zinv,T_z_);
% STEPNINE
tsai_wu=zeros(2,1,length(angle));
for i=1:length(angle)
tsai_wu(:,:,i)=double(solve((H1*sigmal_t(1,:,i)+H2*sigmal_t(2,:,i)+H6*sigmal_t(3,:,i))*s...
+(H11*sigmal_t(1,:,i)^2+H22*sigmal_t(2,:,i)^2+H66*(sigmal_t(3,:,i)^2)+2*H12*sigmal_t(1,:,i)*sigmal_t(2,:,i))*s^2==1,s))
tsai_w=tsai_wu(find(tsai_wu(:,:,i)>0),:,i)
factor(i)=tsai_w
end
thickness
angle
end
0 Comments
Answers (1)
Ameer Hamza
on 10 Sep 2020
The correct condition for while-loop is
while ~(all(factor>1) && all(factor<=1.5))
apart from that, there seems to be some other issue with the program logic, which never creates 'factor' fulfilling this condition.
5 Comments
Ameer Hamza
on 10 Sep 2020
Yes, I meant that the condition
~(all(factor>1) && all(factor<=1.5))
never become true. What do you expect to happen when this condition never becomes true?
See Also
Categories
Find more on Assumptions in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!