• 2022-06-14
    两端固定的阶梯杆如图所示,横截面面积A2=2A1,受轴向载荷P作用,假设A端受压力为NA,C端受拉力为NC,则( )。 [img=234x99]1803088ae38304e.png[/img]
    A: NA = -P/2, NC = P/2;
    B: NA = -P, NC = 0;
    C: NA = 2P/3, NC = P/3;
    D: NA = 0, NC = P;