請例出step同原因
A steel bar 100mm X 12mm in cross-section and 3m long is subjected to an axial pull of 130kN.how much will it increase in lengh if the modulus of elasticity of the steel is 210000 Mpa (Ans - 1.5)
[20分]壓力,應力,YOUNG'S MODULES的問題
2008-10-06 11:40 pm
回答 (1)
2008-10-07 2:34 am
✔ 最佳答案
Young modulus of elasticity is defined as the ratio of the tensile stress applied to a body to the tensile strain produced.Stress = F/A
Strain = e/l
Mathematically,
E = (F/A)/(e/l)
e = Fl / EA
e = (130 X 103)(3) / (210 000 X 106)(0.1 X 0.012)
Extension, e = 0.0015 m
e = 1.5 mm
參考: Myself~~~
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