Merge pull request #1 from prashantsinalkar/masterHEADmaster

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diff --git a/Mechanical_Metallurgy_by_G_E_Dieter/7-Fracture.ipynb b/Mechanical_Metallurgy_by_G_E_Dieter/7-Fracture.ipynb
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+{
+"cells": [
+ {
+		   "cell_type": "markdown",
+	   "metadata": {},
+	   "source": [
+       "# Chapter 7: Fracture"
+	   ]
+	},
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 7.1: Cohesive_Strength.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"//Example 7.1\n",
+"//Cohesive Strength\n",
+"//Page No. 245\n",
+"clc;clear;close;\n",
+"\n",
+"E=95;               //in GPa\n",
+"E=E*10^9;             //conversion to Pa\n",
+"Ys=1000;               //erg/cm^2\n",
+"Ys=Ys*10^-3;                 //conversion to J/m^2\n",
+"a0=1.6;              //in angstrom\n",
+"a0=a0*10^-10;                   //conversion to m\n",
+"sigma_max=(E*Ys/a0)^(1/2)\n",
+"sigma_max=sigma_max*10^-9;\n",
+"printf('Cohesive strength of a silica fiber = %g GPa',sigma_max);"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 7.2: Fracture_Stress.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"//Example 7.2\n",
+"//Fracture Stress\n",
+"//Page No. 246\n",
+"clc;clear;close;\n",
+"\n",
+"E=100;                        //in GPa\n",
+"E=E*10^9;                   //conversion to Pa\n",
+"Ys=1;                       //J/m^2\n",
+"a0=2.5*10^-10;                  //in m\n",
+"c=10^4*a0;\n",
+"sigma_f=(E*Ys/(4*c))^(1/2);\n",
+"sigma_f=sigma_f*10^-6;\n",
+"printf('Fracture Stress = %g MPa',sigma_f);"
+   ]
+   }
+],
+"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
+}