Added(A)/Deleted(D) following books

 A  Electronics_Engineering_by_P._Raja/chapter_1_2.ipynb
A  Electronics_Engineering_by_P._Raja/chapter_2_2.ipynb
A  Electronics_Engineering_by_P._Raja/chapter_3_2.ipynb
A  Electronics_Engineering_by_P._Raja/chapter_4_2.ipynb
A  Electronics_Engineering_by_P._Raja/chapter_5_2.ipynb
A  Electronics_Engineering_by_P._Raja/chapter_6_2.ipynb
A  Electronics_Engineering_by_P._Raja/chapter_7_2.ipynb
A  Electronics_Engineering_by_P._Raja/chapter_8_2.ipynb
A  Electronics_Engineering_by_P._Raja/chapter_9_2.ipynb
A  Electronics_Engineering_by_P._Raja/screenshots/7_2.png
A  Electronics_Engineering_by_P._Raja/screenshots/snap-3_2.png
A  Electronics_Engineering_by_P._Raja/screenshots/snap-6_2.png
A  Machine_Design_by_U.C._Jindal/Ch10.ipynb
A  Machine_Design_by_U.C._Jindal/Ch11.ipynb
A  Machine_Design_by_U.C._Jindal/Ch12.ipynb
A  Machine_Design_by_U.C._Jindal/Ch13.ipynb
A  Machine_Design_by_U.C._Jindal/Ch14.ipynb
A  Machine_Design_by_U.C._Jindal/Ch15.ipynb
A  Machine_Design_by_U.C._Jindal/Ch16.ipynb
A  Machine_Design_by_U.C._Jindal/Ch17.ipynb
A  Machine_Design_by_U.C._Jindal/Ch18.ipynb
A  Machine_Design_by_U.C._Jindal/Ch19.ipynb
A  Machine_Design_by_U.C._Jindal/Ch20.ipynb
A  Machine_Design_by_U.C._Jindal/Ch21.ipynb
A  Machine_Design_by_U.C._Jindal/Ch22.ipynb
A  Machine_Design_by_U.C._Jindal/Ch23.ipynb
A  Machine_Design_by_U.C._Jindal/Ch24.ipynb
A  Machine_Design_by_U.C._Jindal/Ch25.ipynb
A  Machine_Design_by_U.C._Jindal/Ch26.ipynb
A  Machine_Design_by_U.C._Jindal/Ch27.ipynb
A  Machine_Design_by_U.C._Jindal/Ch28.ipynb
A  Machine_Design_by_U.C._Jindal/Ch29.ipynb
A  Machine_Design_by_U.C._Jindal/Ch3.ipynb
A  Machine_Design_by_U.C._Jindal/Ch30.ipynb
A  Machine_Design_by_U.C._Jindal/Ch31.ipynb
A  Machine_Design_by_U.C._Jindal/Ch4.ipynb
A  Machine_Design_by_U.C._Jindal/Ch5.ipynb
A  Machine_Design_by_U.C._Jindal/Ch6.ipynb
A  Machine_Design_by_U.C._Jindal/Ch7.ipynb
A  Machine_Design_by_U.C._Jindal/Ch8.ipynb
A  Machine_Design_by_U.C._Jindal/Ch9.ipynb
A  Machine_Design_by_U.C._Jindal/screenshots/Chapter-3stressgraph.png
A  Machine_Design_by_U.C._Jindal/screenshots/Chapter-_8AdditionalLoad.png
A  Machine_Design_by_U.C._Jindal/screenshots/Chapter11_-_strengthofrevet.png
A  Solid_State_Devices_and_Circuits___by_V._Chaudhary_and_H._K._Maity/Chapter02_2.ipynb
A  Solid_State_Devices_and_Circuits___by_V._Chaudhary_and_H._K._Maity/Chapter03_2.ipynb
A  Solid_State_Devices_and_Circuits___by_V._Chaudhary_and_H._K._Maity/Chapter04_2.ipynb
A  Solid_State_Devices_and_Circuits___by_V._Chaudhary_and_H._K._Maity/Chapter05_2.ipynb
A  Solid_State_Devices_and_Circuits___by_V._Chaudhary_and_H._K._Maity/Chapter06_2.ipynb
A  Solid_State_Devices_and_Circuits___by_V._Chaudhary_and_H._K._Maity/Chapter07_2.ipynb
A  Solid_State_Devices_and_Circuits___by_V._Chaudhary_and_H._K._Maity/Chapter08_2.ipynb
A  Solid_State_Devices_and_Circuits___by_V._Chaudhary_and_H._K._Maity/Chapter09_2.ipynb
A  Solid_State_Devices_and_Circuits___by_V._Chaudhary_and_H._K._Maity/Chapter10_2.ipynb
A  Solid_State_Devices_and_Circuits___by_V._Chaudhary_and_H._K._Maity/Chapter11_2.ipynb
A  Solid_State_Devices_and_Circuits___by_V._Chaudhary_and_H._K._Maity/screenshots/Screenshot_3.1.py.PNG
A  Solid_State_Devices_and_Circuits___by_V._Chaudhary_and_H._K._Maity/screenshots/Screenshot_6.1.py.PNG
A  Solid_State_Devices_and_Circuits___by_V._Chaudhary_and_H._K._Maity/screenshots/Screenshot_6.2.py.PNG
A  sample_notebooks/PriyankaSaini/Chapter3.ipynb
A  sample_notebooks/ebbygeorge/Chapter01.ipynb

1 files changed, 265 insertions, 0 deletions

diff --git a/Machine_Design_by_U.C._Jindal/Ch26.ipynb b/Machine_Design_by_U.C._Jindal/Ch26.ipynb
new file mode 100644
index 00000000..ccdf600d
--- /dev/null
+++ b/Machine_Design_by_U.C._Jindal/Ch26.ipynb
@@ -0,0 +1,265 @@
+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:01c1cdfe5f44c7b9518d8e4611bcc7b558fa40f7241f67c334ff272a81b92cfe"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Ch:26 Helical gears"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "exa 26-1 - Page 698"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "from __future__ import division\n",
+      "from math import sqrt, pi, sin, cos, tan, atan\n",
+      "Zp=20#\n",
+      "Zg=50#\n",
+      "alphan=20*pi/180#\n",
+      "phi=15*pi/180#\n",
+      "mn=4#\n",
+      "m=mn/cos(phi)#\n",
+      "alpha=180/pi*atan(tan(alphan)/(cos(phi)))#\n",
+      "dp=Zp*m#\n",
+      "dg=Zg*m#\n",
+      "ha=4#\n",
+      "hd=1.25*mn#\n",
+      "#Let addendum circle dia of pinion be Pa\n",
+      "Pa=dp+(2*mn)#\n",
+      "#Let dedendum circle dia of pinion be Pd\n",
+      "Pd=dp-(2.5*mn)#\n",
+      "#Let addendum circle dia of gear be Ga\n",
+      "Ga=dg+(2*mn)#\n",
+      "#Let dedendum circle dia of gear be Gd\n",
+      "Gd=dg-(2.5*mn)#\n",
+      "b=pi*mn/sin(phi)#\n",
+      "print \"m is %0.2f mm  \"%(m)#\n",
+      "print \"\\nalpha is %0.3f deg  \"%(alpha)#\n",
+      "print \"\\nPa is %0.1f mm   \"%(Pa)#\n",
+      "print \"\\nPd is %0.1f mm   \"%(Pd)#\n",
+      "print \"\\nGa is %0.0f mm   \"%(Ga)#\n",
+      "print \"\\nGd is %0.0f mm   \"%(Gd)#\n",
+      "print \"\\nb is %0.2f mm   \"%(b)#"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "m is 4.14 mm  \n",
+        "\n",
+        "alpha is 20.647 deg  \n",
+        "\n",
+        "Pa is 90.8 mm   \n",
+        "\n",
+        "Pd is 72.8 mm   \n",
+        "\n",
+        "Ga is 215 mm   \n",
+        "\n",
+        "Gd is 197 mm   \n",
+        "\n",
+        "b is 48.55 mm   \n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "exa 26-2 - Page 698"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "P=5000#\n",
+      "Zp=25#\n",
+      "Zg=50#\n",
+      "mn=4#\n",
+      "alphan=20*pi/180#\n",
+      "phi=20*pi/180#\n",
+      "N=1200#\n",
+      "m=mn/cos(phi)#\n",
+      "dp=Zp*m#\n",
+      "dg=Zg*m#\n",
+      "v=2*pi*N*dp/(60*2*1000)#\n",
+      "Pt=P/v#\n",
+      "Pa=Pt*tan(phi)#\n",
+      "Pr=Pt*tan(alphan)/cos(phi)#\n",
+      "print \"Pt is %0.2f N   \"%(Pt)#\n",
+      "print \"\\nPa is %0.1f N  \"%(Pa)#\n",
+      "print \"\\nPr is %0.2f N  \"%(Pr)#"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Pt is 747.78 N   \n",
+        "\n",
+        "Pa is 272.2 N  \n",
+        "\n",
+        "Pr is 289.64 N  \n"
+       ]
+      }
+     ],
+     "prompt_number": 2
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "exa 26-3 - Page 699"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "Zp=24#\n",
+      "Zg=72#\n",
+      "alphan=20*pi/180#\n",
+      "phi=24*pi/180#\n",
+      "N=720#\n",
+      "mn=5#\n",
+      "b=50#\n",
+      "sigut=600#\n",
+      "BHN=360#\n",
+      "Cs=1.4#\n",
+      "FOS=2#\n",
+      "sigb=sigut/3#\n",
+      "dp=mn*Zp/cos(phi)#\n",
+      "Zp=Zp/(cos(phi))**3#\n",
+      "Zg=Zg/(cos(phi))**3#\n",
+      "Y=0.358+((0.364-0.358)*1.48/2)#\n",
+      "Sb=b*mn*sigb*Y#\n",
+      "Q=(2*Zg)/(Zp+Zg)#\n",
+      "K=0.16*(BHN/100)**2#\n",
+      "Sw=b*dp*Q*K/(cos(phi)**2)#\n",
+      "v=2*pi*N*dp/(60*2*1000)#\n",
+      "Cv=5.6/(5.6+sqrt(v))#\n",
+      "Peff=Sb/FOS#\n",
+      "Pt=Peff*Cv/Cs#\n",
+      "P=Pt*v#\n",
+      "P=P*10**-3#\n",
+      "print \"P is %0.3f kW   \"%(P)#\n",
+      "#The difference in the value is due to rounding-off of the values."
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "P is 22.936 kW   \n"
+       ]
+      }
+     ],
+     "prompt_number": 3
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "exa 26-4 - Page 700"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "Zp=25#\n",
+      "Zg=100#\n",
+      "P=5000#\n",
+      "N=2000#\n",
+      "alphan=20*pi/180#\n",
+      "phi=15*pi/180#\n",
+      "sigut=660#\n",
+      "Cs=1.5#\n",
+      "FOS=1.8#\n",
+      "v=10#\n",
+      "Zp1=Zp/(cos(phi))**3#\n",
+      "Zg1=Zg/(cos(phi))**3#\n",
+      "Y=0.348+(0.74*0.004)#\n",
+      "sigb=sigut/3#\n",
+      "Cv=5.6/(5.6+sqrt(v))#\n",
+      "#Sb=FOS*Peff\n",
+      "mn=FOS*P*Cs*60*1000*2*cos(phi)/(2*pi*N*Cv*Zp*12*sigb*Y)#\n",
+      "mn=mn**(1/3)#\n",
+      "mn=2.5#\n",
+      "dp=mn*Zp/cos(phi)#\n",
+      "Q=(2*Zg)/(Zp+Zg)#\n",
+      "b=12*mn#\n",
+      "Sb=12*sigb*Y#\n",
+      "K=Sb*(cos(phi)**2)/(dp*Q*b)#\n",
+      "BHN=sqrt(K/0.16)*100#\n",
+      "dg=mn*Zg/cos(phi)#\n",
+      "phip=mn+(0.25*sqrt(dp))#\n",
+      "ep=16+(1.25*phip)#\n",
+      "phig=mn+(0.25*sqrt(dg))#\n",
+      "eg=16+(1.25*phig)#\n",
+      "e=ep+eg#\n",
+      "e=e*10**-3#\n",
+      "r1=dp/2#\n",
+      "r2=dg/2#\n",
+      "Pd=e*N*Zp1*b*r1*r2/(2530*sqrt(r1**2+r2**2))#\n",
+      "v=2*pi*N*dp/(60*2*1000)#\n",
+      "#Let tangential component be TC\n",
+      "TC=(Cs*1845/mn)+(Pd*cos(alphan)*cos(phi))#\n",
+      "\n",
+      "Sb=b*mn*sigb*Y#\n",
+      "print \"mn is %0.1f mm   \"%(mn)#\n",
+      "print \"\\nTC is %0.0f N  \"%(TC)#\n",
+      "print \"\\nSb is %0.1f N  \"%(Sb)#\n",
+      "#The difference in the value  of Sb is due to rounding-off of t"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "mn is 2.5 mm   \n",
+        "\n",
+        "TC is 1965 N  \n",
+        "\n",
+        "Sb is 5790.8 N  \n"
+       ]
+      }
+     ],
+     "prompt_number": 4
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
\ No newline at end of file