initial commit / add all books

1 files changed, 24 insertions, 0 deletions

diff --git a/278/CH13/EX13.3/ex_13_3.sce b/278/CH13/EX13.3/ex_13_3.sce
new file mode 100755
index 000000000..5b26dcea4
--- /dev/null
+++ b/278/CH13/EX13.3/ex_13_3.sce
@@ -0,0 +1,24 @@
+//desing keyway in motr shaft

+clc

+//soltuion

+//given

+P=15*10^3//W

+N=960//rpm

+d=40//mm

+l=75//mm

+t=56//N/mm^2

+fc=112//N/mm^2

+Tq=(P*60)/(2*%pi*N)//N-mm

+//let w be width of key

+//Tq=l*w*t*d/2=84000*w

+//w=Tq/84000//mm

+printf("the width of keywy is,%f mm\n",Tq/84000)

+printf("this width is too small,it should be atleats w=d/4,so taking w=d/4 as min widht we get w=d/4=10//mm\n")

+w=10//mm

+T=10//mm//thickness =width=square key

+h=T/2

+e=1-(0.2*(w/d))-1.1*(h/d)

+P1=(pi/16)*t*d^3*e//N//strength of shaft

+Ps=l*w*t*d/2//N//shear strength of shaft

+x=Ps/P1//

+printf("the check value is,%f",x)
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