• 2021-04-14
    两端铰支的细长矩形等截面杆,杆长l,材料为A3钢,弹性模量E,如图受轴向压力F作用,试确定其临界力为https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/cb18a9d27e47469981746e53493951eb.png