I have no idea what to do

I would like to change this code as shown in the following image. I've drawn it up to this point, but what should I do with the details?

Sig_x = 3
Sig_y = 0
Tau_xy = 2
% R:Radius of a Circle ==================
R = sqrt((Sig_x- Sig_y)^2/4+Tau_xy^2);
% Center of the Mohr's Stress Circle ====
Sig_xc =(Sig_x+ Sig_y)/2
Sig_yc = 0
Theta = atand(Tau_xy/(Sig_x-Sig_xc))/2
% Principal stresses ====================
Sig_1 = Sig_xc + R
Sig_2 = Sig_xc - R
% Max shear stress ======================
Tau_max = R
%===== Making Mohr's Circle =============
x=-pi:pi/180:pi;
x1 = R*cos(x)+Sig_xc;
y1 = R*sin(x)+Sig_yc;
plot(x1,y1)
title('Make a Mohr stress Circle with R')
xlabel('Normal stresses \sigma') 
ylabel('Shear stress \tau')
grid on
axis ([Sig_xc-R, Sig_xc+R, -2-R, 2+R])
axis equal, hold on
% =========================================
plot([0 0], [-2-R, 2+R]) % y-축
plot([Sig_xc-2*R Sig_xc+2*R], [0 0]) % x-축
%=========================================

Answer 1

[Mann Baidi]

Hi,

I understand that you would like to add figures and text over the plot.

For adding symbols or text on a figure, you can use the "text" function in MATLAB.

You can customize the text and symbols by referring to the following link.

https://www.mathworks.com/help/matlab/creating_plots/add-text-to-specific-points-on-graph.html

For marking the specific points in the graph, you can add the following code to your script

plot(0,0,"ro","MarkerFaceColor","red","MarkerSize",4)

And lastly, for adding the square in your graph, you can add the following code in the graph.

hold on 
rectangle('Position',[4 -4 2 2]) % the first two values are the position of the bottom left corner followed by length and width

Here is a modified version of your code

Sig_x = 3

Sig_x = 3

Sig_y = 0

Sig_y = 0

Tau_xy = 2

Tau_xy = 2

% R:Radius of a Circle ==================
R = sqrt((Sig_x- Sig_y)^2/4+Tau_xy^2);
% Center of the Mohr's Stress Circle ====
Sig_xc =(Sig_x+ Sig_y)/2

Sig_xc = 1.5000

Sig_yc = 0

Sig_yc = 0

Theta = atand(Tau_xy/(Sig_x-Sig_xc))/2

Theta = 26.5651

% Principal stresses ====================
Sig_1 = Sig_xc + R

Sig_1 = 4

Sig_2 = Sig_xc - R

Sig_2 = -1

% Max shear stress ======================
Tau_max = R

Tau_max = 2.5000

%===== Making Mohr's Circle =============
x=-pi:pi/180:pi;
x1 = R*cos(x)+Sig_xc;
y1 = R*sin(x)+Sig_yc;
plot(x1,y1)
hold on
plot(0,0,"ro","MarkerFaceColor","red","MarkerSize",4)
text(0.2,0,"Origin")
title('Make a Mohr stress Circle with R')
xlabel('Normal stresses \sigma') 
ylabel('Shear stress \tau')
grid on
axis ([Sig_xc-R, Sig_xc+R, -2-R, 2+R])
axis equal, 
hold on
% =========================================
plot([0 0], [-2-R, 2+R]) % y-축
plot([Sig_xc-2*R Sig_xc+2*R], [0 0]) % x-축
%=========================================

hold on 
rectangle('Position',[4 -4 2 2])

Hope this will help in resolving your query!