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{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"# Chapter 18: Extrusion"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"### Example 18.1, Extrusion Process, Page No. 629"
]
},
{
"cell_type": "code",
"execution_count": 1,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"\n",
"Force required for the Operation = 3827.95 metric tons\n",
"\n",
"\n",
"Note: Slight calculation errors in book\n"
]
}
],
"source": [
"from math import log\n",
"from math import radians\n",
"from math import tan\n",
"from math import sqrt\n",
"from math import pi\n",
"\n",
"#variable declaration\n",
"def cot(x):\n",
" return 1/tan(x);\n",
"Db=6;\n",
"Df=2;\n",
"L=15;\n",
"v=2;\n",
"alpha=60;\n",
"mu=0.1;\n",
"\n",
"#calculations\n",
"R=Db**2/Df**2;\n",
"e=6*v*log(R)/Db\n",
"sigma=200*e**0.15;\n",
"alpha=radians(alpha);\n",
"B=mu*cot(alpha);\n",
"p_d=sigma*((1+B)/B)*(1-R**B);\n",
"p_d=abs(p_d);\n",
"t_i=sigma/sqrt(3);\n",
"p_e=p_d+4*t_i*L/Db;\n",
"p_e=p_e*145.0377; #conversion to psi\n",
"A=pi*Db**2/4;\n",
"P=p_e*A;\n",
"P=P*0.000453; #conversion to metric tons\n",
"\n",
"#result\n",
"print('\\nForce required for the Operation = %g metric tons\\n\\n\\nNote: Slight calculation errors in book')%(P);"
]
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 2",
"language": "python",
"name": "python2"
},
"language_info": {
"codemirror_mode": {
"name": "ipython",
"version": 2
},
"file_extension": ".py",
"mimetype": "text/x-python",
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython2",
"version": "2.7.9"
}
},
"nbformat": 4,
"nbformat_minor": 0
}
|
