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-{
- "cells": [
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "# Ch:11 Riveted joints"
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## exa 11-1 - Page 322"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 1,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- " P is 60000 N \n",
- "\n",
- " Ts is 122.23 MPa \n",
- "\n",
- " sigb is 120 MPa \n"
- ]
- }
- ],
- "source": [
- "from math import pi\n",
- "t=20#\n",
- "p=100#\n",
- "d=25#\n",
- "sigt=40#\n",
- "P=(p-d)*t*sigt#\n",
- "Ts=(4*P)/(pi*d**2)#\n",
- "sigb=P/(d*t)#\n",
- "print \" P is %0.0f N \"%(P)#\n",
- "print \"\\n Ts is %0.2f MPa \"%(Ts)#\n",
- "print \"\\n sigb is %0.0f MPa \"%(sigb)#"
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## exa 11-2 - Page 322"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 2,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- " P is 115.5 kN \n",
- "\n",
- " Ts is 81.7 MPa \n",
- "\n",
- " sigb is 175 N/mm**2 \n"
- ]
- }
- ],
- "source": [
- "from math import pi\n",
- "t=22#\n",
- "t1=5*t/8#\n",
- "d=30#\n",
- "p=100#\n",
- "sigt=75#\n",
- "P=(p-d)*t*sigt#\n",
- "Ts=(2*P)/(pi*d**2)#\n",
- "sigb=P/(d*t)#\n",
- "P=P*10**-3\n",
- "print \" P is %0.1f kN \"%(P)#\n",
- "print \"\\n Ts is %0.1f MPa \"%(Ts)#\n",
- "print \"\\n sigb is %0.0f N/mm**2 \"%(sigb)#"
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## exa 11-3 - Page 323"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 3,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- " p is 100 mm \n",
- "\n",
- " n is 0.00 \n"
- ]
- }
- ],
- "source": [
- "from math import pi\n",
- "t=15#\n",
- "t1=5*t/8#\n",
- "d=25#\n",
- "n=2#\n",
- "Ta=80#\n",
- "sigta=100#\n",
- "sigba=120#\n",
- "Ps=n*1.875*pi*d**2*Ta/4#\n",
- "Pb=n*d*t*sigba#\n",
- "p=Pb/(t*Ta)+d#\n",
- "Pp=p*t*Ta#\n",
- "n=Pb/Pp#\n",
- "print \" p is %0.0f mm \"%(p)#\n",
- "print \"\\n n is %0.2f \"%(n)#"
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## exa 11-4 - Page 323"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 4,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- " d is 24 mm \n",
- "\n",
- " n1 is 6 \n",
- "\n",
- " Pt is 225280 N \n",
- "\n",
- " Pt2 is 232960 N \n",
- "\n",
- " Pt3 is 279040 N \n",
- "\n",
- " n2 is 88 \n"
- ]
- }
- ],
- "source": [
- "from math import sqrt, pi\n",
- "b=200#\n",
- "t=16#\n",
- "d=6*sqrt(t)#\n",
- "sigta=80#\n",
- "Ta=60#\n",
- "sigba=100#\n",
- "Pt=(b-d)*t*sigta#\n",
- "Ps=1.875*pi*d**2*Ta/4#\n",
- "Pb=d*t*sigba#\n",
- "n1=Pt/Pb#\n",
- "n1=6#\n",
- "Pt2=((b-(2*d))*t*sigta)+Pb#\n",
- "Pt3=((b-(3*d))*t*sigta)+(3*Pb)#\n",
- "Pp=b*t*sigta#\n",
- "n2=Pt/Pp#\n",
- "n2=n2*100#\n",
- "print \" d is %0.0f mm \"%(d)#\n",
- "print \"\\n n1 is %0.0f \"%(n1)#\n",
- "print \"\\n Pt is %0.0f N \"%(Pt)#\n",
- "print \"\\n Pt2 is %0.0f N \"%(Pt2)#\n",
- "print \"\\n Pt3 is %0.0f N \"%(Pt3)#\n",
- "print \"\\n n2 is %0.0f \"%(n2)#\n",
- "#Answer to strength of rivet in bearing 'Pb' is calculated incorrectly in the book, hence Pt2,Pt3 is calculated subsequently incorrect."
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## exa 11-5 - Page 324"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 5,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- " e is 371.7 mm \n"
- ]
- }
- ],
- "source": [
- "from math import atan\n",
- "a=50#\n",
- "b=75#\n",
- "P=36*10**3#\n",
- "d=24#\n",
- "Ta=60#\n",
- "n=9#\n",
- "A=pi*d**2/4#\n",
- "Td=P/(n*A)#\n",
- "theta=atan(b/a)#\n",
- "Ts=54.64#\n",
- "r2=90.184#\n",
- "e=A*29575.7/P#\n",
- "print \" e is %0.1f mm \"%(e)#"
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## exa 11-6 - Page 325"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 6,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- " d is 12 mm \n"
- ]
- }
- ],
- "source": [
- "from math import sqrt,pi\n",
- "P=12*10**3#\n",
- "Tmax=100#\n",
- "n=6#\n",
- "e=50+50+(5/2)#\n",
- "T=P*e#\n",
- "Td=P/n#\n",
- "ra=125#\n",
- "k=T/((2*125**2)+(2*75**2)+(2*25**2))#\n",
- "Tr=(k*ra)+Td#\n",
- "A=Tr/Tmax#\n",
- "d=sqrt(A*4/pi)#\n",
- "d=12#\n",
- "print \" d is %0.0f mm \"%(d)#"
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## exa 11-7 - Page 326"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 7,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- " n is 80 \n"
- ]
- }
- ],
- "source": [
- "from __future__ import division\n",
- "from math import sqrt,pi\n",
- "t=15#\n",
- "d=6*sqrt(t)#\n",
- "d=24#\n",
- "sigta=75#\n",
- "sigba=105#\n",
- "Ta=60#\n",
- "n=4#\n",
- "Pt=n*pi*d**2*Ta/4#\n",
- "x=d*t*sigta#\n",
- "y=2*t*sigta#\n",
- "p=(Pt+x)/y#\n",
- "p=60#\n",
- "C=4.17#\n",
- "pmax=(C*t)+41.28#\n",
- "Pt1=(y*p)-x#\n",
- "Ps=n*pi*d**2*Ta/4#\n",
- "Pb=n*d*t*sigba#\n",
- "S=2*p*t*sigta#\n",
- "n=Pt1/S#\n",
- "n=n*100#\n",
- "print \" n is %0.f \"%(n)# "
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## exa 11-8 - Page 327"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 8,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- " n is 95 \n"
- ]
- }
- ],
- "source": [
- "from math import sqrt,pi\n",
- "D=1500#\n",
- "p=2#\n",
- "nt=0.75#\n",
- "sigut=420#\n",
- "FOS=5#\n",
- "sigta=sigut/FOS#\n",
- "t=p*D/(2*sigta*nt)#\n",
- "t=24#\n",
- "d=6*sqrt(t)#\n",
- "d=30#\n",
- "Ta=330/5#\n",
- "sigba=640/5#\n",
- "Ps=2*1.875*pi*(d**2)*Ta/4#\n",
- "p=(Ps/(t*sigta))+d#\n",
- "p=117#\n",
- "t1=5*t/8#\n",
- "Pt=(p-d)*t*sigta#\n",
- "Pp=p*t*sigta#\n",
- "Pb=2*d*t*sigba#\n",
- "n=Ps/Pb#\n",
- "n=n*100#\n",
- "print \" n is %0.0f \"%(n)#"
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## exa 11-9 - Page 327"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 9,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- " n is 39 \n"
- ]
- }
- ],
- "source": [
- "from math import sqrt,pi\n",
- "D=1200#\n",
- "p=2.5#\n",
- "sigba=110#\n",
- "Pa=pi*D**2*p/4#\n",
- "nt=0.8#\n",
- "sigta=80#\n",
- "t=p*D/(2*sigta*nt)#\n",
- "t=24#\n",
- "d=6*sqrt(t)#\n",
- "d=30#\n",
- "Ta=55#\n",
- "Ps=pi*(d**2)*Ta/4#\n",
- "Np=Pa/Ps#\n",
- "Np=74#\n",
- "nr=Np/2#\n",
- "p=pi*(D+t)/nr#\n",
- "pb=2*d#\n",
- "m=1.5*d#\n",
- "Pt=(p-d)*t*sigta#\n",
- "Ps=2*Ps#\n",
- "Pb=2*d*t*sigba#\n",
- "Pp=p*t*sigta#\n",
- "n=Ps/Pp#\n",
- "n=n*100#\n",
- "print \" n is %0.0f \"%(n)#"
- ]
- }
- ],
- "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 07:01:10 +0000