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来源：百度知道 编辑：UC知道 时间：2024/06/27 08:18:56
The orientation of the principal planes may be calculated using the following formula:
taα=2v/f (4-3)
where α is the angle measured from the horizontal.
The magnitudes of the shearing stresses and bending stresses vary along the length of the beam and with distance from the neutral axis. It then follows that the inclination of the principal planes as well as the magnitude of the principal stresses will also vary. At the neutral axis the principal stresses will occur at a 45~ angle. This may be verified by Equation (4-3), substituting f = 0, from which tan 2α = ∞ and α = 45.
taα=2v/f (4-3)
where α is the angle measured from the horizontal.
The magnitudes of the shearing stresses and bending stresses vary along the length of the beam and with distance from the neutral axis. It then follows that the inclination of the principal planes as well as the magnitude of the principal stresses will also vary. At the neutral axis the principal stresses will occur at a 45~ angle. This may be verified by Equation (4-3), substituting f = 0, from which tan 2α = ∞ and α = 45.
主要飞机的取向也许被计算使用以下惯例: ta?=2v/f (4-3) 在哪里? 是角度被计量从水平。 抗剪应力和弯曲的重音的巨大变化沿射线的长度和以从中立轴的距离。它然后随后而来,主要飞机的倾向以及主要重音的巨大并且将变化。在中立轴主要重音将发生在45~ 角度。这也许由Equation (4-3) 核实, 替代f = 0, tan 2? =? 并且? = 45 。