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-{
- "metadata": {
-  "name": "",
-  "signature": "sha256:8681b8cb87a35e316321fbab8aecdb38b5b347586e7dea8acd0d04d98e829c88"
- },
- "nbformat": 3,
- "nbformat_minor": 0,
- "worksheets": [
-  {
-   "cells": [
-    {
-     "cell_type": "heading",
-     "level": 1,
-     "metadata": {},
-     "source": [
-      "Chapter09:Fracture of Metals"
-     ]
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Ex9.1:pg-200"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "#Example 9.1 : difference\n",
-      "import math \n",
-      "#given data :\n",
-      "E=200*10**9; # in N/m**2\n",
-      "C=(4*10**-6)/2;# in m\n",
-      "gama=1.48; # in J/m**2\n",
-      "sigma=math.sqrt((2*E*gama)/(math.pi*C));\n",
-      "print round(sigma*10**-6),\"= fracture strength,sigma(MN/m**2) \"\n"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "307.0 = fracture strength,sigma(MN/m**2) \n"
-       ]
-      }
-     ],
-     "prompt_number": 2
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Ex9.2:pg-200"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "#Example 9.2 : the fracture strength and compare\n",
-      " \n",
-      "import math\n",
-      "#given data :\n",
-      "E=70*10**9; # in N/m**2\n",
-      "C=(4.2*10**-6)/2;# in m\n",
-      "gama=1.1; # in J/m**2\n",
-      "sigma=math.sqrt((2*E*gama)/(math.pi*C));\n",
-      "print sigma,\"= fracture strength,sigma(N/m**2)  \"\n"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "152783261.475 = fracture strength,sigma(N/m**2)  \n"
-       ]
-      }
-     ],
-     "prompt_number": 3
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Ex9.3:pg-200"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "#Example 9.3 : maximum length of surface\n",
-      "import math\n",
-      "\n",
-      "#given data :\n",
-      "sigma=36;#in MN/m**2\n",
-      "gama=0.27;# in J/m**2\n",
-      "E=70*10**9;#in N/m**2\n",
-      "C=((2*E*gama)/(sigma**2*math.pi))*10**-6;\n",
-      "C2=2*C;\n",
-      "print round(C2,3),\"= maximum length of surface flow,C2(micro-m)   \"\n"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "18.568 = maximum length of surface flow,C2(micro-m)   \n"
-       ]
-      }
-     ],
-     "prompt_number": 5
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Ex9.4a:pg-203"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "# Example 9.4.a: Temperature\n",
-      " \n",
-      "import math\n",
-      "E=350;# in GN/m**2\n",
-      "Y=2;# in J/m**2\n",
-      "C=2;# in micro meter\n",
-      "sg=math.sqrt((2*E*10**9*Y)/(math.pi*C*10**-6));# IN mn/M**2\n",
-      "e=10**-2;# per second\n",
-      "T=173600/(round(sg*10**-6)-20.6-61.3*(math.log10(e)));# in kelvin\n",
-      "print round(T,1),\"= temperature in kelvin for ductile to brittle transition at a strain rate of 10**-2 per second\"\n"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "302.4 = temperature in kelvin for ductile to brittle transition at a strain rate of 10**-2 per second\n"
-       ]
-      }
-     ],
-     "prompt_number": 8
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Ex9.4b:pg-203"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "# Example 9.4.b: Temperature\n",
-      "import math\n",
-      "\n",
-      "E=350;# in GN/m**2\n",
-      "Y=2;# in J/m**2\n",
-      "C=2;# in micro meter\n",
-      "sg=math.sqrt((2*E*10**9*Y)/(math.pi*C*10**-6));# IN mn/M**2\n",
-      "e=10**-5;# per second\n",
-      "T=173600/(round(sg*10**-6)-20.6-61.3*(math.log10(e)));# in kelvin\n",
-      "print round(T),\"= temperature in kelvin for ductile to brittle transition at a strain rate of 10**-5 per second\"\n"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "229.0 = temperature in kelvin for ductile to brittle transition at a strain rate of 10**-5 per second\n"
-       ]
-      }
-     ],
-     "prompt_number": 10
-    }
-   ],
-   "metadata": {}
-  }
- ]
-}
-\ No newline at end of file