弹性模量
一种材料属性：在弹性极限以下，轴向应力与轴向应变之比。（也称杨氏模量。）
各向同性材料只有一个弹性模量。像钛这样的正交各向异性材料则有三个主弹性模量。弹性模量还可能取决于原材料坯料的尺寸。
弹性模量随温度升高而降低。
对于各向同性材料，如果已知细丝波速，则弹性模量可按下式计算 —
\begin{align} \label{eq:12301a} E &= \rho \, {c_{tw}}^2 \end{align}
式中 —
| \( E \) | = 弹性模量（杨氏模量） |
| \( \rho \) | = 密度 |
| \( c_{tw} \) | = 细丝波速 |
Modulus of elasticity
A material property: the ratio of axial stress to axial strain below the elastic limit. (Also called Young's modulus.)
An isotropic material has only one modulus of elasticity. An orthotropic material like titanium has three principal moduli of elasticity. The modulus of elasticity may also depend on the size of the raw stock.
The modulus of elasticity decreases with temperature.
For an isotropic material, if the thin-wire wave speed is known then the modulus of elasticity can be calculated from —
\begin{align} \label{eq:12301a} E &= \rho \, {c_{tw}}^2 \end{align}
where —
| \( E \) | = modulus of elasticity (Young's modulus) |
| \( \rho \) | = density |
| \( c_{tw} \) | = thin-wire wave speed |