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diff --git a/Machine_Design-I_by_Dr._Sadhu_Singh/chapter5.ipynb b/Machine_Design-I_by_Dr._Sadhu_Singh/chapter5.ipynb new file mode 100644 index 00000000..208c11ea --- /dev/null +++ b/Machine_Design-I_by_Dr._Sadhu_Singh/chapter5.ipynb @@ -0,0 +1,671 @@ +{ + "cells": [ + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "# Chapter 5 - Riveted Joints" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## exa 5.1 Pg 142" + ] + }, + { + "cell_type": "code", + "execution_count": 1, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + " DESIGNING LONGITUDINAL JOINT - \n", + "\n", + " \n", + " Plate Thickness\n", + " , t = 30.30 mm\n", + " \n", + " use t = 32 mm\n", + " \n", + " Diameter of rivet hole, do = \n", + " 33.94 mm\n", + " \n", + " Use do = 34 mm\n", + " \n", + " Diameter of rivet, d = \n", + " 33.00 mm\n", + " \n", + " Pitch of rivets, p = \n", + " 220.7 mm\n", + " \n", + " as per IBR-\n", + " pitch, pmax = 232 mm\n", + " \n", + " Use p = 220 mm\n", + " \n", + " pitch of rivets in inner row, pi = 110 mm\n", + " \n", + " distance between outer and adjacent row = 82.5 mm\n", + " \n", + " take & use this distance = 85 mm\n", + " \n", + " distance between inner row for zig-zag riveting = 59.4 mm\n", + " \n", + " take & use this distance = 60 mm\n", + " \n", + " Thickness of wide butt strap, t= \n", + " 24 mm\n", + " \n", + " Thickness of narrow butt strap, t= 20 mm\n", + " \n", + " margin, m = 52 mm\n", + " \n", + " strength of the joint = 2350472 N\n", + " \n", + " strength of solid plate = 563200 N\n", + " \n", + " Efficiency of joint, eta_l = 417.3 %\n", + " \n", + "\n", + " DESIGNING CIRCUMFERENTIAL JOINT- \n", + "\n", + " \n", + " Plate Thickness\n", + " , t = 32.00 mm\n", + " \n", + " Diameter of rivet hole, do = \n", + " 34.50 mm\n", + " \n", + " Diameter of rivet, d = \n", + " 33.00 mm\n", + " \n", + " no. of rivets = 78.8\n", + " \n", + " take n = 80\n", + " \n", + " pitch of rivets, pc = 4213.00 mm\n", + " use pc = 4213 mm\n", + " \n", + " Efficiency of joint, eta_c = 99.18 %\n", + " \n", + " for zig-zag riveting, distance between rows of rivets = 1413.4 mm. use 65 mm\n", + " \n", + " margin, m = 52 mm\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import pi,sqrt,ceil\n", + "# Given Data\n", + "ps=2.5## MPa\n", + "D=1.5##m\n", + "sigma_t=80## MPa\n", + "tau=60## MPa\n", + "sigma_c=120## MPa\n", + "n=5## no. of rivets\n", + "\n", + "print ' DESIGNING LONGITUDINAL JOINT - \\n'\n", + "print ' \\n Plate Thickness'\n", + "eta_l=80## % (efficiency)\n", + "t = ps*D*1000/2/sigma_t/(eta_l/100)+1## mm\n", + "print ' , t = %.2f mm'%(t)\n", + "t=32##mm (adopted for design)\n", + "print ' \\n use t = %d mm'%(t)\n", + "print ' \\n Diameter of rivet hole, do = '\n", + "d0=6*sqrt(t)##mm (for t>8 mm)\n", + "print ' %.2f mm'%(d0)\n", + "d0=34.5## suggested for design\n", + "print ' \\n Use do = %.f mm'%(d0)\n", + "print ' \\n Diameter of rivet, d = '\n", + "d=d0-1.5##mm \n", + "print ' %.2f mm'%(d)\n", + "print ' \\n Pitch of rivets, p = '\n", + "Ps=(4*1.875+1)*pi/4*d0**2*tau## N\n", + "# Putting Pt=Ps where Pt=(p-d0)*t*sigma_t## N\n", + "Pt=Ps##N\n", + "p=Pt/(t*sigma_t)+d0## N\n", + "print ' %.1f mm'%(p)\n", + "C=6## for 5 no. of rivets\n", + "pmax=C*t+40## mm (as per IBR)\n", + "print ' \\n as per IBR-\\n pitch, pmax = %.f mm'%(pmax)\n", + "p=220## mm (adopted for design)\n", + "print ' \\n Use p = %.f mm'%(p)\n", + "pi=p/2## mm \n", + "print ' \\n pitch of rivets in inner row, pi = %.f mm'%(pi)\n", + "\n", + "#Distance between rows of rivets\n", + "dis1=0.2*p+1.115*d0## mm \n", + "print ' \\n distance between outer and adjacent row = %.1f mm'%(dis1)\n", + "dis1=85##mm (adopted for design)\n", + "print ' \\n take & use this distance = %.f mm'%( dis1)\n", + "dis2=0.165*p+0.67*d0## mm \n", + "print ' \\n distance between inner row for zig-zag riveting = %.1f mm'%( dis2)\n", + "dis2=60##mm (adopted for design)\n", + "print ' \\n take & use this distance = %.f mm'%( dis2)\n", + "print ' \\n Thickness of wide butt strap, t= '\n", + "t1=0.75*t## mm (wide butt strap)\n", + "print ' %.f mm'%(t1)\n", + "t2=0.625*t## mm (narrow butt strap)\n", + "print ' \\n Thickness of narrow butt strap, t= %.f mm'%(t2)\n", + "#margin\n", + "m=ceil(1.5*d0)## mm\n", + "print ' \\n margin, m = %.f mm'%(m)\n", + "# Efficiency of joint\n", + "Pt=(p-d0)*t*sigma_t## N\n", + "Ps=Ps## N (shearing resistance of rivets)\n", + "Pc=n*d0*t*sigma_c## N (crushing resistance of rivets)\n", + "sigma_com = (p-2*d0)*t*sigma_t+pi/4*d0**2*tau## N\n", + "print ' \\n strength of the joint = %d N'%(sigma_com)\n", + "P=p*t*sigma_t##N (strength of solid plate)\n", + "print ' \\n strength of solid plate = %d N'%(P)\n", + "eta_l=sigma_com/P*100## % (efficiency)\n", + "print ' \\n Efficiency of joint, eta_l = %.1f %%'%(eta_l)\n", + "\n", + "print ' \\n\\n DESIGNING CIRCUMFERENTIAL JOINT- \\n'\n", + "t=32## mm\n", + "d0=34.5##mm\n", + "d=33##mm\n", + "print ' \\n Plate Thickness'\n", + "print ' , t = %.2f mm'%(t)\n", + "print ' \\n Diameter of rivet hole, do = '\n", + "print ' %.2f mm'%(d0)\n", + "print ' \\n Diameter of rivet, d = '\n", + "print ' %.2f mm'%(d) \n", + "n=(D*1000/d0)**2*(ps/tau)## no. of rivets\n", + "print ' \\n no. of rivets = %.1f'%(n)\n", + "n=80## adopted for design\n", + "print ' \\n take n = %d'%(n)\n", + "# Pitch of rivets\n", + "n1=n/2## no. of rivets per row\n", + "pc=pi*(D*1000+t)/n1## mm (pitch of rivets)\n", + "print ' \\n pitch of rivets, pc = %.2f mm\\n use pc = %.f mm'%(pc,pc)\n", + "eta_c=(pc-d0)/pc*100## % (efficiency of joint)\n", + "print ' \\n Efficiency of joint, eta_c = %.2f %%'%(eta_c)\n", + "dis=0.33*pc+0.67*d0## mm (distance between rows of rivets)\n", + "print ' \\n for zig-zag riveting, distance between rows of rivets = %.1f mm. use 65 mm'%( dis)\n", + "m=1.5*d0## mm (Margin)\n", + "print ' \\n margin, m = %.f mm'%(m)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## exa 5.2 Pg 147" + ] + }, + { + "cell_type": "code", + "execution_count": 2, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + " \n", + " Diameter of rivet, do = \n", + " 26.83 mm\n", + " \n", + " Standard diameter of rivet hole, do = 29 mm & corresponding diameter of rivet = 27 mm\n", + " \n", + " no. of rivets, n = 9.629. Use n = 10 \n", + " \n", + " thickness of inner butt strap, t1 = 15 mm\n", + " \n", + " thickness of outer butt strap, t2 = 15 mm\n", + " \n", + " efficiency of joint = 92.75 %\n", + " \n", + " pitch of rivets = 92 mm. Use 100 mm\n", + " \n", + " margin,\n", + " m = 43.5 mm. Use 50 mm\n", + " \n", + " w = 400 mm\n", + " \n", + " distance between rows = 72.5 mm. Use 75 mm\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import sqrt,pi,ceil\n", + "# Given Data\n", + "w=400##mm\n", + "t=20##mm\n", + "sigma_t=90## MPa\n", + "tau=60## MPa\n", + "sigma_c=140## MPa\n", + "\n", + "print ' \\n Diameter of rivet, do = '\n", + "d0=6*sqrt(t)##mm (for t>8 mm)\n", + "print ' %.2f mm'%(d0)\n", + "d0=29##mm (standard)\n", + "print ' \\n Standard diameter of rivet hole, do = %.f mm & corresponding diameter of rivet = 27 mm'%(d0)\n", + "Pt=(w-d0)*t*sigma_t##N max. tearing strength of plate\n", + "Ps=1.75*pi/4*d0**2*tau## N (shearing strength of one rivet)\n", + "n1=Pt/Ps## no. of rivets\n", + "n=ceil(n1)#\n", + "print ' \\n no. of rivets, n = %.3f. Use n = %.f '%(n1,n)\n", + "t1=0.75*t## mm\n", + "t2=t1## mm\n", + "print ' \\n thickness of inner butt strap, t1 = %.f mm'%( t1)\n", + "print ' \\n thickness of outer butt strap, t2 = %.f mm'%( t2)\n", + "# section 1-1 \n", + "P1=(w-d0)*t*sigma_t##N\n", + "# section 2-2 \n", + "P2=(w-2*d0)*t*sigma_t+1.75*pi/4*d0**2*tau##N\n", + "# section 3-3 \n", + "P3=(w-3*d0)*t*sigma_t+1.75*3*pi/4*d0**2*tau##N\n", + "# section 4-4\n", + "P4=(w-4*d0)*t*sigma_t+1.75*6*pi/4*d0**2*tau##N\n", + "Ps=10*Ps## N (shearing stress of all rivets)\n", + "Pc=10*d0*t*sigma_c## N (shearing stress of all rivets)\n", + "Pj=P1## N (strength f joint)\n", + "P = w*t*sigma_t## N (strength of solid plate)\n", + "eta=P1/P*100# # % (efficiency of joint)\n", + "print ' \\n efficiency of joint = %.2f %%'%( eta)\n", + "p1=3*d0+5## mm (pitch of rivets)\n", + "p=100##mm (adopt for design)\n", + "print ' \\n pitch of rivets = %.f mm. Use %.f mm'%(p1,p)\n", + "m1=1.5*d0## mm (margin)\n", + "m=50##mm\n", + "w=3*p+2*m## mm\n", + "print ' \\n margin,\\n m = %.1f mm. Use %.f mm'%( m1,m)\n", + "print ' \\n w = %.f mm'%(w)\n", + "dis=2.5*d0## mm\n", + "print ' \\n distance between rows = %.1f mm. Use 75 mm'%(dis)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## exa 5.3 Pg 150" + ] + }, + { + "cell_type": "code", + "execution_count": 3, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + " \n", + " diameter of rivets = 16.99 mm. Use d0 = 17.5 mm & d=16 mm for design.\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import sqrt,pi,ceil,acos,cos\n", + "# Given Data\n", + "n=6## no. of rivets\n", + "P=54## kN\n", + "e=200##mm \n", + "a=50##mm (from fig.5.13(a))\n", + "b=100##mm (from fig.5.13(a))\n", + "tau=120## MPa\n", + "\n", + "Pd=P/n*1000## N (direct shear load in rivet)\n", + "C=P*e## kN.mm (Couple)\n", + "#l1=l3=l4=l6\n", + "l1=sqrt(a**2+b**2)## mm\n", + "l3=l1#l4=l1#l6=l1#mm\n", + "l2=a#l5=a##mm\n", + "# F1/l1*(4*l1**2+2*l2**2)=C\n", + "F1=C*1000/(4*l1**2+2*l2**2)*l1## N\n", + "theta1=acos(a/l1)## radian\n", + "R1=sqrt(Pd**2+F1**2+2*Pd*F1*cos(theta1))## N (resultant force in rivet 1)\n", + "#R1=pi/4*d0**2*tau\n", + "d0=sqrt(R1/(pi/4*tau))## mm\n", + "print ' \\n diameter of rivets = %.2f mm. Use d0 = 17.5 mm & d=16 mm for design.'%(d0)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## exa 5.4 Pg 151" + ] + }, + { + "cell_type": "code", + "execution_count": 4, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + " DESIGNING LONGITUDINAL JOINT - \n", + "\n", + " \n", + " Plate Thickness\n", + " , t = 9.61 mm\n", + " \n", + " use t = 10 mm\n", + " \n", + " Diameter of rivet hole, do = \n", + " 18.97 mm\n", + " \n", + " Use do = 19.5 mm\n", + " \n", + " Diameter of rivet, d = \n", + " 18.00 mm\n", + " \n", + " Pitch of rivets, p = \n", + " 89.18 mm\n", + " \n", + " as per IBR-\n", + " pitch, pmax = 75 mm\n", + " \n", + " Use p = 75 mm\n", + " \n", + " distance between rows of rivets = 37.8 mm\n", + " \n", + " take & use this distance = 40 mm\n", + " \n", + " Thickness of butt strap, t= \n", + " 6.25 mm\n", + " \n", + " Use thickness = 7 mm\n", + " \n", + " margin, m = 30 mm\n", + " \n", + " strength of the joint = 49950 N\n", + " \n", + " strength of solid plate = 67500 N\n", + " \n", + " Efficiency of joint, eta_l = 74.00 % = 75 % as given\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import ceil,sqrt,pi\n", + "# Given Data\n", + "D=0.75##m\n", + "ps=1.55## N/mm.sq\n", + "eta_l=0.75## efficiency\n", + "sigma_t=90## MPa\n", + "sigma_c=140## MPa\n", + "tau=56## MPa\n", + "n=2## no. of rivets\n", + "\n", + "print ' DESIGNING LONGITUDINAL JOINT - \\n'\n", + "print ' \\n Plate Thickness'\n", + "t = ps*D*1000/2/sigma_t/eta_l+1## mm\n", + "print ' , t = %.2f mm'%(t)\n", + "t=ceil(t)##mm (adopted for design)\n", + "print ' \\n use t = %d mm'%(t)\n", + "\n", + "print ' \\n Diameter of rivet hole, do = '\n", + "d0=6*sqrt(t)##mm (for t>8 mm)\n", + "print ' %.2f mm'%(d0)\n", + "d0=19.5## suggested for design\n", + "print ' \\n Use do = %.1f mm'%(d0)\n", + "print ' \\n Diameter of rivet, d = '\n", + "d=d0-1.5##mm \n", + "print ' %.2f mm'%(d)\n", + "\n", + "print ' \\n Pitch of rivets, p = '\n", + "Ps=(2*1.875)*pi/4*d0**2*tau## N\n", + "# Putting Pt=Ps where Pt=(p-d0)*t*sigma_t## N\n", + "Pt=Ps##N\n", + "p=Pt/(t*sigma_t)+d0## N\n", + "print ' %.2f mm'%(p)\n", + "C=3.5## for 2 no. of rivets\n", + "pmax=C*t+40## mm (as per IBR)\n", + "print ' \\n as per IBR-\\n pitch, pmax = %.f mm'%(pmax)\n", + "p=75## mm (adopted for design)\n", + "print ' \\n Use p = %.f mm'%(p)\n", + "\n", + "#Distance between rows of rivets\n", + "dis=0.33*p+0.67*d0## mm \n", + "print ' \\n distance between rows of rivets = %.1f mm'%(dis)\n", + "dis=40##mm (adopted for design)\n", + "print ' \\n take & use this distance = %.f mm'%( dis)\n", + "\n", + "print ' \\n Thickness of butt strap, t= '\n", + "t1=0.625*t## mm\n", + "print ' %.2f mm'%(t1)\n", + "t1=7## mm (adopted for design)\n", + "print ' \\n Use thickness = %.f mm'%(t1)\n", + "\n", + "#margin\n", + "m=ceil(1.5*d0)## mm\n", + "print ' \\n margin, m = %.f mm'%(m)\n", + "\n", + "# Efficiency of joint\n", + "Pt=(p-d0)*t*sigma_t## N\n", + "Ps=Ps## N (shearing resistance of rivets)\n", + "Pc=n*d0*t*sigma_c## N (crushing resistance of rivets)\n", + "sigma_com = (p-2*d0)*t*sigma_t+pi/4*d0**2*tau## N\n", + "print ' \\n strength of the joint = %d N'%(Pt)\n", + "P=p*t*sigma_t##N (strength of solid plate)\n", + "print ' \\n strength of solid plate = %d N'%(P)\n", + "eta_l=Pt/P*100## % (efficiency)\n", + "print ' \\n Efficiency of joint, eta_l = %.2f %% = 75 %% as given'%(eta_l)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## exa 5.6 Pg 153" + ] + }, + { + "cell_type": "code", + "execution_count": 5, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + " \n", + " diameter of rivets = 22.81 mm. Use d0 = 21.5 mm & d=20 mm for design.\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import cos,pi,sqrt,sin,atan,tan\n", + "# Given Data\n", + "n=5## no. of rivets\n", + "P=45## kN\n", + "alfa=30## degree\n", + "tau=120## MPa\n", + "\n", + "\n", + "Pd=P/n*1000## N (direct shear load in rivet)\n", + "# C.G. of rivet group\n", + "# values below are collected direct from figure\n", + "x_bar=(3*200)/5## mm\n", + "y_bar=(1*50+1*150+1*100+1*200)/5## mm\n", + "ex=300+x_bar+y_bar##mm\n", + "ey=100##mm\n", + "l1=sqrt(x_bar**2+(y_bar/2)**2)## mm\n", + "l2=l1##mm\n", + "l3=sqrt(100**2+80**2)## mm\n", + "l4=80##mm\n", + "l5=l3##mm\n", + "\n", + "#2*F1*l1+2*F3*l3+F4*l4=P*cos(alfa)*ex+P*sin(alfa)*ey\n", + "F1=(P*1000*cos(pi/180*alfa)*ex+P*1000*sin(pi/180*alfa)*ey)/(2*l1**2+2*l3**2+l4**2)*l1##N\n", + "# rivet 1 is nearest\n", + "Beta = atan(x_bar/(y_bar/2))*180/pi## degree\n", + "theta1=Beta-(90-alfa)## degree\n", + "R1=sqrt(Pd**2+F1**2+2*Pd*F1*cos(pi/180*theta1))## N (resultant force in rivet 1)\n", + "#R1=pi/4*d0**2*tau\n", + "d0=sqrt(R1/(pi/4*tau))## mm\n", + "print ' \\n diameter of rivets = %.2f mm. Use d0 = 21.5 mm & d=20 mm for design.'%(d0)\n", + "# Note - Ans in the textbook is wrong." + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## exa 5.7 Pg 155" + ] + }, + { + "cell_type": "code", + "execution_count": 6, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + " Diameter of rivets, d0 = 11.46 mm. Take d0=13.5 mm & d=12 mm\n", + " \n", + " Distance between rows of rivet = 35.2 mm = 35 mm\n", + " \n", + " back pitch = 21 mm\n", + " \n", + " tearing strength = 28380 N\n", + " \n", + " shearing strength = 28628 N\n", + " \n", + " crushing strength = 24300 N\n", + " \n", + " joint strength = 24300 N\n", + " \n", + " strength of solid plate = 46200 N\n", + " \n", + " efficiency of joint = 52.6 %\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import pi,sqrt,floor\n", + "# Given Data\n", + "t=6##mm\n", + "sigma_t=220## MPa\n", + "tau=100## MPa\n", + "sigma_c=150## MPa\n", + "n=2## no. of rivets / pitch length\n", + "#Ps=n*pi/4**d0**2*tau## shearing strength of rivets\n", + "#Pc=2*d0*t*sigma_c## Crushing strength of rivets\n", + "d0=2*t*sigma_c/(n*pi/4*tau)## mm (equating Ps=Pc)\n", + "print ' Diameter of rivets, d0 = %.2f mm. Take d0=13.5 mm & d=12 mm'%(d0)\n", + "d0=13.5##mm\n", + "d=12##mm\n", + "#Pt=(p-d0)*t*sigma_t## tearing strength\n", + "# equating Pt=Ps\n", + "#p= n*pi/4**d0**2*tau/(t*sigma_t)+d0##mm\n", + "p= n*pi/4*d0**2*tau/(t*sigma_t)+d0\n", + "print ' \\n Distance between rows of rivet = %.1f mm = %.f mm'%(p,p)\n", + "p=floor(p)##mm\n", + "pb=0.6*p##mm (back pitch)\n", + "print ' \\n back pitch = %.f mm'%(pb)\n", + "Pt=(p-d0)*t*sigma_t## N (tearing strength)\n", + "print ' \\n tearing strength = %.f N'%(Pt)\n", + "Ps=n*pi/4*d0**2*tau## N ( shearing strength)\n", + "print ' \\n shearing strength = %.f N'%(Ps)\n", + "Pc=2*d0*t*sigma_c##N (Crushing strength of rivets)\n", + "print ' \\n crushing strength = %.f N'%(Pc)\n", + "joint_strength = Pc## N\n", + "print ' \\n joint strength = %.f N'%(joint_strength)\n", + "P=p*t*sigma_t##N (strength of solid plate)\n", + "print ' \\n strength of solid plate = %.f N'%(P)\n", + "eta = joint_strength/P*100## % (efficiency)\n", + "print ' \\n efficiency of joint = %.1f %%'%( eta)" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## exa 5.8 Pg 156" + ] + }, + { + "cell_type": "code", + "execution_count": 7, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + " Diameter of rivets - \n", + " d0 = 11.654 mm\n", + " \n", + " Use d0 = 13.5 mm & d = 12 mm\n" + ] + } + ], + "source": [ + "from __future__ import division\n", + "from math import sqrt,pi\n", + "# Given Data\n", + "P=20## kN\n", + "e=80##mm\n", + "tau=150## MPa\n", + "\n", + "\n", + "Pd=P/4## kN\n", + "C=P*e## kN.mm (Couple)\n", + "# As C.G. lies at 45mm from top rivet\n", + "l1=45;l4=45##mm \n", + "l2=15;l3=15##mm\n", + "#(F1/l1)*(2*l1*l4+2*l2*l3) = C\n", + "F1= C*1000/(2*l1*l4+2*l2*l3)*l1##N\n", + "R1=sqrt(Pd**2+F1**2)## N\n", + "#R1=pi/4*d0**2*tau\n", + "d0=sqrt(R1/(pi/4*tau))##mm\n", + "print ' Diameter of rivets - \\n d0 = %.3f mm'%(d0)\n", + "print ' \\n Use d0 = 13.5 mm & d = 12 mm'" + ] + } + ], + "metadata": { + "kernelspec": { + "display_name": "Python 2", + "language": "python", + "name": "python2" + }, + "language_info": { + "codemirror_mode": { + "name": "ipython", + "version": 2 + }, + "file_extension": ".py", + "mimetype": "text/x-python", + "name": "python", + "nbconvert_exporter": "python", + "pygments_lexer": "ipython2", + "version": "2.7.9" + } + }, + "nbformat": 4, + "nbformat_minor": 0 +} |