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-{
- "metadata": {
-  "name": "",
-  "signature": "sha256:eb3a8ca85b2b3516ec190a12a8401ddf32d140498cd023be9bda6228b1754025"
- },
- "nbformat": 3,
- "nbformat_minor": 0,
- "worksheets": [
-  {
-   "cells": [
-    {
-     "cell_type": "heading",
-     "level": 1,
-     "metadata": {},
-     "source": [
-      "Chapter 26: Closed Section Beams"
-     ]
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Example 26.3 Pg.No.693"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "from __future__ import division\n",
-      "from sympy import solve, symbols\n",
-      "import math\n",
-      "\n",
-      "\n",
-      "G=20000               #shear modulus (N/mm^2)\n",
-      "E=G/0.36              #young's modulus\n",
-      "tau=20                #torque (Nm/mm)\n",
-      "t=1\n",
-      "b=200\n",
-      "a=500\n",
-      "L=2500\n",
-      "A=800\n",
-      "\n",
-      "#torque at each support \n",
-      "T=20*5000/2\n",
-      "\n",
-      "mu=math.sqrt(8*G*t/(A*E*(b+a)))\n",
-      "\n",
-      "z=2500\n",
-      "F=-1.95/mu*math.cosh(mu*z)+1.75*z**2\n",
-      "\n",
-      "z=0                            # at mid-span z=0\n",
-      "theta=10**(-8)*(1.95/mu*math.cosh(mu*z)-1.75*z**2+F)\n",
-      "print \"twist at mid-span = %1.3f rad = %1.2f degree\"%(theta,theta*180/math.pi)"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "twist at mid-span = 0.108 rad = 6.20 degree\n"
-       ]
-      }
-     ],
-     "prompt_number": 13
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [],
-     "language": "python",
-     "metadata": {},
-     "outputs": []
-    }
-   ],
-   "metadata": {}
-  }
- ]
-}
-\ No newline at end of file