1 files changed, 41 insertions, 0 deletions
diff --git a/278/CH15/EX15.11/ex_15_11.sce b/278/CH15/EX15.11/ex_15_11.sce
new file mode 100755
index 000000000..71d6fa659
--- /dev/null
+++ b/278/CH15/EX15.11/ex_15_11.sce
@@ -0,0 +1,41 @@
+//design pins at L,M,N
+clc
+//solution
+//given
+//ref fig 15.27
+As=15//mm^2
+tu=400//N/mm^2
+ft=80//N/mm^2
+pb=20//N/mm^2
+Ps=As*tu//N
+//let P1 be force in link LM
+P1=(Ps*100)/(350)//N
+//taking momnet abt N,we get P
+P=(P1*100)/(900)//N
+N=P1+P//N
+//let d be dia and l be length of pins
+//l=1.25d
+//N=d*l*pb=25*d^2
+//d=sqrt(N/25)//mm
+printf("the dia is,%f mm\n",sqrt(N/25))
+printf("the dia is ,say 10 mm\n")
+d=10//mm
+l=1.25*d//mm
+printf("the length of pin is,%f mm\n",l)
+ti=(N*4)/(2*d^2*%pi)//N/mm^2
+printf("the induced stress is,%f mm\n",ti)
+printf("sinc induced stress is withi safe limits,then design is safe\n")
+printf("the dia of hole is,%f mm\n",d+6)
+printf("the dia of boss is,%f mm\n",2*16)
+//design for link
+//let d1 be dia of link
+//N=(%pi/4)*d1^2*ft=62.84*d1^2
+d1=sqrt(N/62.84)//mm
+printf("the dia of link is,%f mm\n",d1)
+//let t3 be thickness and B be width of lever
+t3=12.5//mm
+M=N*100//N-mm
+//Z=(1/6)*t*B^2=2.1*B^2
+//fb=M/Z=90762/B^2
+B=sqrt(90762/80)//mm
+printf("the width of lever is,%f mm",B)