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Diffstat (limited to 'Machine_Design_by_U.C._Jindal/Ch9.ipynb')
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diff --git a/Machine_Design_by_U.C._Jindal/Ch9.ipynb b/Machine_Design_by_U.C._Jindal/Ch9.ipynb new file mode 100644 index 00000000..0e704ca7 --- /dev/null +++ b/Machine_Design_by_U.C._Jindal/Ch9.ipynb @@ -0,0 +1,358 @@ +{ + "metadata": { + "name": "", + "signature": "sha256:4885451d1eb84f1c7ede3570bb9a4c180b0235da374d3be406dcc799b426e236" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": [ + "Ch:9 Threaded Fasteners" + ] + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "exa 9-1 - Page 266" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import pi\n", + "p1=2#\n", + "d=16#\n", + "dt1=d-(0.93825*p1)#\n", + "At1=pi*dt1**2/4#\n", + "p2=1.5#\n", + "d=16#\n", + "dt2=d-(0.93825*p2)#\n", + "At2=pi*dt2**2/4#\n", + "\n", + "print \" At1 is %0.1f mm**2 \"%(At1)#\n", + "print \"\\n At2 is %0.1f mm**2 \"%(At2)#" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + " At1 is 156.7 mm**2 \n", + "\n", + " At2 is 167.2 mm**2 \n" + ] + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "exa 9-2 - Page 266" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "W=20*10**3#\n", + "n=4#\n", + "#Let the load on each bolt be W1\n", + "W1=W/n#\n", + "At=W1/80#\n", + "\n", + "print \"At is %0.1f mm**2 \"%(At)#" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "At is 62.0 mm**2 \n" + ] + } + ], + "prompt_number": 3 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "exa 9-3 - Page 267" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import atan, tan, cos\n", + "d=18#\n", + "p=2.5#\n", + "dr=d-(1.2268*p)#\n", + "dm=(d+dr)/2#\n", + "alpha=atan(p/(pi*dm))#\n", + "theta=pi*30/180#\n", + "u1=0.15#\n", + "u2=0.13#\n", + "x=(tan(alpha)+(u1/cos(theta)))/(1-(tan(alpha)*u1/cos(theta)))#\n", + "K=dm*x/(2*d)+(0.625*u2)#\n", + "print \"K is %0.5f \"%(K)#" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "K is 0.18343 \n" + ] + } + ], + "prompt_number": 4 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "exa 9-4 - Page 267" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import log\n", + "d=20#\n", + "t=4#\n", + "Lg=84#\n", + "Ad=pi*d**2/4#\n", + "Eb=205*10**3#\n", + "Ed=105*10**3#\n", + "kb=Ad*Eb/Lg#\n", + "lg=80#\n", + "x=5*(lg+(0.5*d))/(lg+(2.5*d))#\n", + "kp=pi*Ed*d/(2*log(x))#\n", + "At=245#\n", + "sigb=105#\n", + "Pe=20*10**3#\n", + "Pb=Pe*kb/(kb+kp)#\n", + "sigad=Pb/At#\n", + "finalst=sigb+sigad#\n", + "\n", + "print \"final stress is %0.2f N/mm**2 \"%(finalst)#" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "final stress is 123.28 N/mm**2 \n" + ] + } + ], + "prompt_number": 5 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "exa 9-5 - Page 268" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "Eb=207*10**3#\n", + "Ec=105*10**3#\n", + "sigp=650#\n", + "At=115#\n", + "Pi=0.75*sigp*At#\n", + "F=sigp*At#\n", + "#Let the additional load Fadd\n", + "Padd=F-Pi#\n", + "d=14#\n", + "Ad=pi*d**2/4#\n", + "Lg=63#\n", + "kb=Ad*Eb/Lg#\n", + "lg=60#\n", + "x=5*(lg+(0.5*d))/(lg+(2.5*d))#\n", + "km=pi*Ec*d/(2*log(x))#\n", + "C=kb/(kb+km)#\n", + "Pe=Padd/C#\n", + "K=0.2#\n", + "Ti=Pi*K*d*10**-3#\n", + "\n", + "print \"Ti is %0.2f Nm \"%(Ti)#" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "Ti is 156.97 Nm \n" + ] + } + ], + "prompt_number": 6 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "exa 9-6 - Page 269" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "d=20#\n", + "sigp=600#\n", + "At=245#\n", + "Pi=120*10**3#\n", + "Pe=30*10**3#\n", + "C=0.35#\n", + "Pb=C*Pe#\n", + "P=Pi+Pb#\n", + "sigi=Pi/At#\n", + "sigf=P/At#\n", + "K=0.18#\n", + "T=K*d*Pi*10**-3#\n", + "E1=sigi/sigp#\n", + "E2=sigf/sigp#\n", + "\n", + "print \" sigi is %0.1f MPa \"%(sigi)#\n", + "print \"\\n sigi is %0.2f MPa \"%(sigf)#\n", + "print \"\\n T is %0.0f Nm \"%(T)#\n", + "print \"\\n E1 is %0.3f \"%(E1)#\n", + "print \"\\n E2 is %0.3f \"%(E2)#\n", + " \n", + " #Value upto tenthth place is considered in the book for value of final stress in bolt, 'sigf'" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + " sigi is 489.0 MPa \n", + "\n", + " sigi is 532.65 MPa \n", + "\n", + " T is 432 Nm \n", + "\n", + " E1 is 0.000 \n", + "\n", + " E2 is 0.888 \n" + ] + } + ], + "prompt_number": 7 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "exa 9-7 - Page 269" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "from math import sqrt\n", + "p=2#\n", + "d=16#\n", + "dt=d-(0.938*p)#\n", + "At=pi*dt**2/4#\n", + "r=60*sqrt(2)#\n", + "Td=1/(4*At)#\n", + "Ta=120#\n", + "T=8.722*10**-3#\n", + "P=Ta/T*10**-3#\n", + "\n", + "print \"P is %0.3f kN \"%(P)#\n", + " \n", + " #Value upto hundredth place is considered in the book for value of permissible load, 'P'" + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "P is 13.758 kN \n" + ] + } + ], + "prompt_number": 8 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": [ + "exa 9-8 - Page 270" + ] + }, + { + "cell_type": "code", + "collapsed": false, + "input": [ + "sigyp=460#\n", + "FOS=2#\n", + "Ts=0.577*sigyp/FOS#\n", + "At=245#\n", + "r=100#\n", + "P=Ts*At/1.453*10**-3#\n", + "print \"The eccentric load is %f N \"%(P)\n", + "print \"P is %0.3f kN \"%(P)#\n", + "#Value of thousandth place of eccentric load, 'P' is misprinted in the book. " + ], + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": [ + "The eccentric load is 22.377116 N \n", + "P is 22.377 kN \n" + ] + } + ], + "prompt_number": 9 + } + ], + "metadata": {} + } + ] +}
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