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author | Prashant S | 2020-04-14 10:25:32 +0530 |
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committer | GitHub | 2020-04-14 10:25:32 +0530 |
commit | 06b09e7d29d252fb2f5a056eeb8bd1264ff6a333 (patch) | |
tree | 2b1df110e24ff0174830d7f825f43ff1c134d1af /Machine_Design_by_T_H_Wentzell/16-Clutches_and_Brakes.ipynb | |
parent | abb52650288b08a680335531742a7126ad0fb846 (diff) | |
parent | 476705d693c7122d34f9b049fa79b935405c9b49 (diff) | |
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diff --git a/Machine_Design_by_T_H_Wentzell/16-Clutches_and_Brakes.ipynb b/Machine_Design_by_T_H_Wentzell/16-Clutches_and_Brakes.ipynb new file mode 100644 index 0000000..8d73712 --- /dev/null +++ b/Machine_Design_by_T_H_Wentzell/16-Clutches_and_Brakes.ipynb @@ -0,0 +1,214 @@ +{ +"cells": [ + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "# Chapter 16: Clutches and Brakes" + ] + }, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 16.1: Calculation_of_Torque_and_Power.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"clear;\n", +"mprintf('MACHINE DESIGN \n Timothy H. Wentzell, P.E. \n EXAMPLE-16.1 Page No.358\n');\n", +"//Torque capacity\n", +"f=0.3;\n", +"N=120;\n", +"ro=12;\n", +"ri=9;\n", +"Tf=f*N*(ro+ri)/2;\n", +"mprintf('\n Torque capacity = %f in-lb.',Tf);\n", +"n=2000;\n", +"//Power\n", +"Pf=Tf*n/63000;\n", +"mprintf('\n Power = %f hp.',Pf);" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 16.2: Determination_of_Breaking_Torque.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"clear;\n", +"mprintf('MACHINE DESIGN \n Timothy H. Wentzell, P.E. \n EXAMPLE-16.2 Page No.359\n');\n", +"//Normal force\n", +"W=100;\n", +"L=20;\n", +"a=4;\n", +"N=(W*L)/a;\n", +"mprintf('\n Normal force = %f lb.',N);\n", +"//Torque friction\n", +"f=0.4;\n", +"D=12;\n", +"Tf=f*N*D/2;\n", +"mprintf('\n Torque friction = %f in-lb.',Tf);" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 16.3: Torque_Transmitting_Capacity.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"clear;\n", +"mprintf('MACHINE DESIGN \n Timothy H. Wentzell, P.E. \n EXAMPLE-16.3 Page No.360\n');\n", +"//For alpha=20 deg.\n", +"alpha=20*(%pi/180);\n", +"f=0.35;\n", +"rm=12/2;\n", +"Fa=75;\n", +"Tf=(f*rm*Fa)/(sin(alpha)+f*cos(alpha));\n", +"mprintf('\n Torque capacity (alpha=20 deg.) = %f in-lb.',Tf);\n", +"//For alpha=10 deg.\n", +"alpha=10*(%pi/180);\n", +"Tf=(f*rm*Fa)/(sin(alpha)+f*cos(alpha));\n", +"mprintf('\n Torque capacity (alpha=10 deg.) = %f in-lb.',Tf);" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 16.4: Calculation_of_Stopping_Force_Torque_per_Brake_Normal_Brake_Force_etc.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"clear;\n", +"mprintf('MACHINE DESIGN \n Timothy H. Wentzell, P.E. \n EXAMPLE-16.4 Page No.361\n');\n", +"//Stopping rate\n", +"V=60*5280/3600;\n", +"Va=0.5*V;\n", +"D=400;\n", +"t=D/Va;\n", +"a=V/t;\n", +"mprintf('\n Stopping rate = %f ft/sec^2.',a);\n", +"//Stopping force\n", +"W=40000;\n", +"g=32.2;\n", +"F=W*a/g;\n", +"//Torque\n", +"r=36/2;\n", +"T=F*r;\n", +"mprintf('\n Torque = %f in-lb.',T);\n", +"//For each wheel\n", +"T=T/10;\n", +"//Braking normal force\n", +"rm=10;\n", +"f=0.4;\n", +"N=T/(f*rm);\n", +"mprintf('\n Braking normal force = %f lb.',N);\n", +"//Note-There is an error in the answer given in textbook" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 16.5: Rotational_Inertia_and_Brake_Power.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"clear;\n", +"mprintf('MACHINE DESIGN \n Timothy H. Wentzell, P.E. \n EXAMPLE-16.5 Page No.365\n');\n", +"W=3500;\n", +"V=73;\n", +"g=32.2;\n", +"V=50*5280/3600;\n", +"V=round(V);\n", +"//Kinetic energy to be absorbed\n", +"KE=W*V^2/(2*g);\n", +"mprintf('\n Kinetic energy to be absorbed = %f ft-lb.',KE);\n", +"//Temperature rise\n", +"Uf=KE;\n", +"Wb=40;\n", +"c=93;\n", +"deltaT=Uf/(Wb*c);\n", +"mprintf('\n Temperature rise = %f deg.',deltaT);\n", +"//Stopping time\n", +"a=20;\n", +"t=V/a;\n", +"mprintf('\n Stopping time = %f sec.',t);\n", +"//Frictional power\n", +"t=round(t*10)/10;\n", +"fhp=Uf/(550*t);\n", +"mprintf('\n Frictional power = %f hp.',fhp)" + ] + } +], +"metadata": { + "kernelspec": { + "display_name": "Scilab", + "language": "scilab", + "name": "scilab" + }, + "language_info": { + "file_extension": ".sce", + "help_links": [ + { + "text": "MetaKernel Magics", + "url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md" + } + ], + "mimetype": "text/x-octave", + "name": "scilab", + "version": "0.7.1" + } + }, + "nbformat": 4, + "nbformat_minor": 0 +} |