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-{
- "cells": [
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "# Ch:13 Cotter and knuckle joints"
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## exa 13-1 - Page 371"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 1,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- " d is 26 mm \n",
- "\n",
- " d1 is 32 mm \n",
- "\n",
- " d2 is 44 mm \n",
- "\n",
- " d3 is 64 mm \n",
- "\n",
- " d4 is 40 mm \n",
- "\n",
- " sigbc is 103.0 MPa \n"
- ]
- }
- ],
- "source": [
- "from math import sqrt, pi\n",
- "F=25*10**3#\n",
- "sigat=50#\n",
- "Ta=40#\n",
- "pa=80#\n",
- "d=sqrt((4*F)/(pi*sigat))#\n",
- "d=26#\n",
- "t=d/4#\n",
- "t=7#\n",
- "d1=1.2*d#\n",
- "d1=32#\n",
- "pc=F/(d1*t)#\n",
- "t=10#\n",
- "c=0.75*d#\n",
- "c=20#\n",
- "d2=44#\n",
- "tw=(d2-d1)/2#\n",
- "b=F/(2*t*Ta)#\n",
- "b=34#\n",
- "a=0.5*d#\n",
- "d3=(F/(pa*t))+d1#\n",
- "d3=64#\n",
- "e=F/(Ta*(d3-d1))#\n",
- "d4=sqrt((F*4/(pi*pa))+d1**2)#\n",
- "d4=40#\n",
- "f=0.5*d#\n",
- "sigbc=3*F*d3/(t*b**2*4)#\n",
- "print \" d is %0.0f mm \"%(d)#\n",
- "print \"\\n d1 is %0.0f mm \"%(d1)#\n",
- "print \"\\n d2 is %0.0f mm \"%(d2)#\n",
- "print \"\\n d3 is %0.0f mm \"%(d3)#\n",
- "print \"\\n d4 is %0.0f mm \"%(d4)#\n",
- "print \"\\n sigbc is %0.1f MPa \"%(sigbc)#"
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## exa 13-2 - Page 372"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 2,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- " d is 21 mm \n",
- "\n",
- " d1 is 28 mm \n",
- "\n",
- " t is 10 mm \n",
- "\n",
- " b is 31 mm \n",
- "\n",
- " d2 is 40 mm \n",
- "\n",
- " L is 138 mm \n"
- ]
- }
- ],
- "source": [
- "from math import sqrt, pi\n",
- "P=40*10**3#\n",
- "sigut=490#\n",
- "FOS=4#\n",
- "sigts=sigut/FOS#\n",
- "sigcs=1.4*sigts#\n",
- "sigs=0.8*sigts#\n",
- "d=sqrt((4*P)/(pi*sigts))#\n",
- "d=21#\n",
- "sigcc=1.4*330/4#\n",
- "Tc=0.8*330/4#\n",
- "t=d/3#\n",
- "b=P/(2*t*Tc)#\n",
- "b=31#\n",
- "t=10#\n",
- "d1=28#\n",
- "d2=40#\n",
- "c=d/2#\n",
- "c=15#\n",
- "a=P/(2*(d2-d1)*98)#\n",
- "a=20#\n",
- "L=(2*a)+(2*b)+(2*c)+(2*3)#\n",
- "print \" d is %0.0f mm \"%(d)#\n",
- "print \"\\n d1 is %0.0f mm \"%(d1)#\n",
- "print \"\\n t is %0.0f mm \"%(t)#\n",
- "print \"\\n b is %0.0f mm \"%(b)#\n",
- "print \"\\n d2 is %0.0f mm \"%(d2)#\n",
- "print \"\\n L is %0.0f mm \"%(L)#"
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## exa 13-3 - Page 372"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 3,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- " a is 33 mm \n",
- "\n",
- " t is 11 mm \n",
- "\n",
- " t1 is 16 mm \n",
- "\n",
- " b is 20 mm \n",
- "\n",
- " b1 is 25 mm \n",
- "\n",
- " l1 is 14 mm \n",
- "\n",
- " l2 is 14 mm \n",
- "\n",
- " l3 is 20 mm \n",
- "\n",
- " l4 is 11 mm \n",
- "\n",
- " sigcr is 110.0 MPa \n",
- "\n",
- " sigcr1 is 113.0 MPa \n"
- ]
- }
- ],
- "source": [
- "from math import sqrt, pi\n",
- "P=40*10**3#\n",
- "sigt=60#\n",
- "sigc=125#\n",
- "T=45#\n",
- "a=sqrt(P*3/(2*sigt))#\n",
- "a=33#\n",
- "t=a/3#\n",
- "b=P/(4.5*t*T)#\n",
- "b=20#\n",
- "b1=1.25*b#\n",
- "t1=P*3/(4*a*sigt)#\n",
- "t1=16#\n",
- "l2=P/(2*2*T*t1)#\n",
- "l2=14#\n",
- "l1=P/(2*a*T)#\n",
- "l1=14#\n",
- "l3=(0.6*a)#\n",
- "l3=20#\n",
- "l4=11#\n",
- "sigcr=P/(t*a)#\n",
- "sigcr1=P/(2*t1*t)#\n",
- "print \" a is %0.0f mm \"%(a)#\n",
- "print \"\\n t is %0.0f mm \"%(t)#\n",
- "print \"\\n t1 is %0.0f mm \"%(t1)#\n",
- "print \"\\n b is %0.0f mm \"%(b)#\n",
- "print \"\\n b1 is %0.0f mm \"%(b1)#\n",
- "print \"\\n l1 is %0.0f mm \"%(l1)#\n",
- "print \"\\n l2 is %0.0f mm \"%(l2)#\n",
- "print \"\\n l3 is %0.0f mm \"%(l3)#\n",
- "print \"\\n l4 is %0.0f mm \"%(l4)#\n",
- "print \"\\n sigcr is %0.1f MPa \"%(sigcr)#\n",
- "print \"\\n sigcr1 is %0.1f MPa \"%(sigcr1)#"
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## exa 13-4 - Page 373"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 4,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- " d is 30 mm \n",
- "\n",
- " sigt is 52.1 MPa \n",
- "\n",
- " b is 36 mm \n"
- ]
- }
- ],
- "source": [
- "P=50*10**3#\n",
- "sigp=380#\n",
- "FOS=4#\n",
- "sigca=80#\n",
- "Ta=50#\n",
- "sigta=sigp/FOS#\n",
- "At=P/sigta#\n",
- "d=30#\n",
- "d1=1.5*d#\n",
- "t=P/(sigca*d1)#\n",
- "t=14#\n",
- "A=(pi*(d1**2)/4)-(d1*t)#\n",
- "#let tearing stress be sigt\n",
- "sigt=P/A#\n",
- "b=P/(2*t*Ta)#\n",
- "b=36#\n",
- "print \" d is %0.0f mm \"%(d)#\n",
- "print \"\\n sigt is %0.1f MPa \"%(sigt)#\n",
- "print \"\\n b is %0.0f mm \"%(b)#\n",
- " \n",
- "#The answer to tearing stress in bolt 'sigt' is calculated incorrectly in the book."
- ]
- }
- ],
- "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
-}
generated by cgit (git 2.34.1) at 2024-12-20 08:01:36 +0000