2 files changed, 20 insertions, 0 deletions
diff --git a/3250/CH3/EX3.12/Ex3_12.sce b/3250/CH3/EX3.12/Ex3_12.sce
new file mode 100755
index 000000000..9d8acf773
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+++ b/3250/CH3/EX3.12/Ex3_12.sce
@@ -0,0 +1,15 @@
+clc 
+// Given that
+d = 50 // Diameter of the steel sheet in mm
+t = 3 // Thickness of the steel sheet in mm
+e = 1.75 // True fracture strain
+Y = 2.1e3 // True fracture stress for the material in N/mm^2
+// Sample Problem 12 on page no. 149
+printf("\n # PROBLEM 3.12 # \n")
+C_0 = (t/(1.36*exp(e)))*((2*exp(e))-1)/((2.3*exp(e))-1)
+p = t*(1/2.45)*((1.9*exp(e))-1)/((2.56*exp(e))-1)
+F = Y*C_0*%pi*d
+W = (1/2)*(F)*(p)*(10^-3)
+printf("\n The proper clearance between die and punch = %f mm, \n Maximum punching force = %f N, \n Energy required to punch the hole = %f J",C_0,F/1000,W)
+// Answer in the book given as 45.74 J for energy required to punch the hole
+ 
diff --git a/3250/CH3/EX3.12/Ex3_12.txt b/3250/CH3/EX3.12/Ex3_12.txt
new file mode 100755
index 000000000..43b4179b3
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+++ b/3250/CH3/EX3.12/Ex3_12.txt
@@ -0,0 +1,5 @@
+ # PROBLEM 3.12 # 
+
+ The proper clearance between die and punch = 0.329240 mm, 
+ Maximum punching force = 108.605364 N, 
+ Energy required to punch the hole = 48.101933 J 
+\ No newline at end of file