主要研究了楔形变截面压杆绕弱轴的弹塑性弯曲失稳。
The elastoplastic bending instability of the tapered compression members under axial loads about the weak axis is mainly studied.
对SP侧压过程中板坯的塑性变形情况，及板坯尾部的失稳弯曲进行了理论分析。
The plastic deformation of the slab being pressed by sizing press(SP) is expounded, and the bending of the slab end is theoretically analyzed as well.
钻井界普遍认为，在弯曲的井眼中钻柱不会发生失稳现象，但未见到详细的理论论证。
The drilling circles generally considers that for the drill stem in crooked hole, the phenomenon of losing stability will not happen, but a detail theoretical proof is not seen.
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