A bellows can also carry increasing torsion load to some extent even after buckled, and its elastic torsion angle can be much lager than its buckling angle.

• 波纹管失稳以后依然可以在一定范围内承受增大的扭矩，其在弹性范围内的扭转角度远大于屈曲发生时的扭转角度。