initial commit / add all books

1 files changed, 38 insertions, 0 deletions

diff --git a/278/CH9/EX9.12/ex_9_12.sce b/278/CH9/EX9.12/ex_9_12.sce
new file mode 100755
index 000000000..51cf3ca09
--- /dev/null
+++ b/278/CH9/EX9.12/ex_9_12.sce
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+//desing an economical joint

+clc

+//solution

+//given

+b=350//mm

+t=20//mm

+ft=90//N/mm^2

+T=60//N/mm^2

+fc=150//N/mm^2

+printf("the value of d is,%f mm\n",6*sqrt(t))

+//d=26.8//mm

+//standard value is d=29mm using table 9.7

+d=29//mm

+Pt=(b-d)*t*ft//N

+Ps=1.75*(pi/4)*d^2*T//N

+Pc=d*t*fc//N

+n=Pt/Ps

+t1=0.75*t//mm

+Pt1=(b-d)*t*ft//N

+Pt2=(b-2*d)*t*ft+Ps//N

+Pt3=(b-3*d)*t*ft+(3*Ps)//N

+Pt4=(b-3*d)*t*ft+(6*Ps)//N

+Ps9=9*Ps//N//for 9 rivets

+Pc9=9*Pc//N//for 9 rivets

+P=b*t*ft//N

+printf("the value of forces is,%f N\n,%f N\n,%f N\n,%f N\n,%f N\n,%f N\n",Pt1,Pt2,Pt3,Pt4,Ps9,Pc9)

+//eff=least(Pt1.Pt2,Pt3,Pt4,Ps9,Pc9)/P

+eff=Pt1/P//since Pt1 is least

+p=3*d +5//mm//pitch

+m=1.5*d//mm

+d1=2.5*d//mm//dis btw rows of rivets

+printf("the diameter is,%f mm\n",d)

+printf("the nuber of rivets is,%f\n",n)

+printf("the thickness of strap is,%f mm\n",t1)

+printf("the eff is,%f\n",eff)

+printf("the pitch is,%f mm\n",p)

+printf("the marginl pitch is,%f mm\n",m)

+printf("the dis btw row is,%f mm",d1)
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