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一、关于公式 (σ_1~2+2.4τ_c~2)~(1/2)≤R_o的力学意义 (σ_1~2+2.4τ_cp~2)~(1/2)是表示截面的极限应力状态呢?还是梁中某点的最大换算应力? 我们不能同意它是梁中某点的最大换算应力的说法,因为: (一)截面中任一点的换算应力在任何情况下不可能超过腹钣边缘处或梁的中性轴处的换算应力。这一点后
First, the mechanical significance (σ_1 ~ 2 + 2.4τ_cp ~ 2) ~ (1/2) of the formula (σ_1 ~ 2 + 2.4τ_c ~ 2) ~ (1/2) ≤R_o means the ultimate stress state of the cross section? Or the maximum conversion stress at a point in the beam? We can not agree that it is the maximum conversion stress at a point in the beam because: (a) The conversion stress at any point in the section can not in any case exceed the edge of the web or Converted stress at the neutral axis of the beam. After this point