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   "source": [
    "# Chapter 14: Brittle Fracture and Impact Testing"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Example 14.1, Stress Corrosion Cracking, Page No. 494"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {
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    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "\n",
      "Estimated Life = 11.5741 days\n",
      "\n",
      "\n",
      "\n",
      "---------------------------------\n",
      "Stress, MPa\tCrack Length, mm\n",
      "---------------------------------\n",
      "\n",
      "\t500\t\t0.105226\n",
      "\n",
      "\t300\t\t0.292296\n",
      "\n",
      "\t100\t\t2.63066\n",
      "\n",
      "---------------------------------\n"
     ]
    }
   ],
   "source": [
    "from math import pi\n",
    "\n",
    "#variable declaration\n",
    "cg=0.01;\n",
    "gr=10**-8;\n",
    "\n",
    "#calculation\n",
    "l=cg/(gr*3600*24);\n",
    "K_l_SCC=10;\n",
    "a_sigma2=K_l_SCC**2/(1.21*pi);\n",
    "s=[500,300,100];\n",
    "\n",
    "#result\n",
    "print('\\nEstimated Life = %g days')%(l);\n",
    "print('\\n\\n\\n---------------------------------\\nStress, MPa\\tCrack Length, mm\\n---------------------------------\\n');\n",
    "for i in range (0,3):\n",
    "    print('\\t%g\\t\\t%g\\n')%(s[i],a_sigma2*1000/s[i]**2);\n",
    "print('---------------------------------');"
   ]
  }
 ],
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