initial commit / add all books

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diff --git a/278/CH5/EX5.11/ex_5_11.sce b/278/CH5/EX5.11/ex_5_11.sce
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+//find stresses in inner and outer fibres

+clc

+//refer fig 5.11 and gfig 5.12

+//solution

+//given

+W=20*10^3//N

+Ri=50//mm

+Ro=150//mm

+h=100//mm

+b=20//mm

+A=b*h//mm^2//area

+Rn=h/{log(Ro/Ri)}//mm//rad of neutral axis

+R=Ri+h/2//rad of centroidal axis

+e=R-Rn

+x=R//mm//distnce btw load and centroidal axis

+M=W*x//N-mm

+f=W/A//N/mm^2

+yi=Rn-Ri

+yo=Ro-Rn

+fbi=(M*yi)/(A*e*Ri)//N/mm^2

+fbo=(M*yo)/(A*e*Ro)//N/mm^2

+Fi=f+fbi//N/mm^2

+Fo=f-fbo//N/mm^2

+printf("the value of e is,%f mm\n",e)

+printf("the value of Rn is,%f mm\n",Rn)

+printf("the stress on section X-X is,%f N/mm^2\n",f)

+printf("the max bedning stress on inner surafce,%f N/mm^2\n",fbi)

+printf("the max bending stress on outer surface is,%f N/mm^2\n",fbo)

+printf("the resultant streess on inner surface is,%f N/mm^2\n",Fi)

+printf("the resultant stress on outer surface is,%f N/mm^2\n",Fo)
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