E=200GPa->200*10^3MPa
材料在x方向之應變為
(應力x - (蒲松比(應力y+應力z)) / E
=>(100 - 0.3( 80 +0 )) / 200*10^3
=>38*10^-5
=>3.8*10^-4
267 一物體受兩軸向負荷,若σx = 100MPa,σy = 80MPa,E ..-阿摩線上測驗