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JOEFRESH10
24.06.2019 •
Physics
Another name for light is electromagnetic radiation microwave radiation visible radiation
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Ответ:
Ответ:
its electromagnetic radiation
Explanation:
i just did it
Ответ:
Explanation:
A) we know that volume is given as V
where D = 1.5 in , h = 2.0 in
so![V = \frac{\pi}{4} 1.5^2\times 2 = 3.53in^3](/tpl/images/0257/3502/8ab7f.png)
yield strenth is given as![\sigma_y = \frac{force}{area} = \frac{140,000}{1.76}](/tpl/images/0257/3502/48f81.png)
b)
elastic strain![\epsilon = \frac{\sima_y}{E} = \frac{79.224}{30\times 10^3} = 0.00264](/tpl/images/0257/3502/aed0a.png)
strain offsets = 0.00264 + 0.002 = 0.00464 [where 0.002 is offset given]
area![A = \frac{volume}{height} = \frac{3.534}{1.9907} = 1.775 in^2](/tpl/images/0257/3502/13ec7.png)
True strain![\sigma = \frac{force}{area} = \frac{140,000}{1.775 in^2} = 78,862 psi](/tpl/images/0257/3502/a5d5f.png)
At P= 260,000 lb ,![A = \frac{3.534}{1.6} = 2.209 inc^2](/tpl/images/0257/3502/f47be.png)
true stress![\sigma = \frac{260,000}{2.209} = 117,714 psi](/tpl/images/0257/3502/89628.png)
true strain![\epsilon = ln\frac{2}{1.6} = 0.223](/tpl/images/0257/3502/fbe80.png)
flow curve is given as \sigma = k\epsilon^n
so flow curve is
Solving 1 and 2
we get
n = 0.103
and K =137,389 psi
Strength coffecient = K = 137.389ksi
strain hardening exponent = n = 0.103