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{
"metadata": {
"name": "",
"signature": "sha256:f729277270c4906babbae57b26d0a48c913109394e1fe2bf1cae355bbbb10bbd"
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"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter11-Elastic Stability"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex1-pg319"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"#calcualte weight and N\n",
"E=210*10**9. ##Pa\n",
"d=100. ##mm\n",
"t=50 ##mm\n",
"A=0.005\n",
"Iz=0.05*(0.1**3)/12.\n",
"print(Iz)\n",
"Iy=0.1*(0.05**3)/12\n",
"print(Iy)\n",
"##r=sqrt(Iy/A)\n",
"r= math.sqrt(Iy/A)\n",
"print(r)##mm\n",
"L=2.75\n",
"\n",
"##P=W/tand(15)=3.732\n",
"Pcr=(math.pi**2.*E*Iz)/L**2.\n",
"print'%s %.2f %s'%(\"into W is= \",Pcr,\"\")\n",
"W=Pcr/3.732\n",
"print'%s %.2f %s'%(\"in N is= \",W,\"\")\n",
"\n",
"Pcr=(math.pi**2*E*Iy)/L**2.\n",
"print'%s %.2f %s'%(\"into W is= \",Pcr,\"\")\n",
"W=Pcr/3.732\n",
"print'%s %.2f %s'%(\"in N is= \",W,\"\")\n",
"\n",
"## Ans varies due to round of error\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"4.16666666667e-06\n",
"1.04166666667e-06\n",
"0.0144337567297\n",
"into W is= 1141937.70 \n",
"in N is= 305985.45 \n",
"into W is= 285484.42 \n",
"in N is= 76496.36 \n"
]
}
],
"prompt_number": 1
}
],
"metadata": {}
}
]
}
|
