• 2022-06-26
    图示平面单元的单元劲度矩阵中的元素[img=41x22]1803d19553511ee.png[/img][img=262x126]1803d1955de48a6.jpg[/img]
    A: [img=33x41]1803d19569d2777.jpg[/img]
    B: [img=34x46]1803d19574477b0.jpg[/img]
    C: [img=34x44]1803d1957e521a5.jpg[/img]
    D: [img=45x42]1803d19589d7961.jpg[/img]