涡破裂前，气动弹性失稳表现为单纯的颤振问题。
Before the vortex breakdown, the aeroelastic instability presents itself as just a simple flutter.
轴 类零件开式挤压失稳包括弹性失稳和塑性失稳。
The instability includes elastic instability and plastic instability in open-die extrusion.
采用弹性理论研究了圆柱形胶体在表面张力作用下的弹性失稳问题；
The elastic instability of a gel cylinder was researched with classical elastic theory.
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