The relation between stress and strain of upper or lowerflange is linear.
上下翼缘应力与应变关系均为直线。
2
The bottom plating is a principal longitudinal member providing the lowerflange of hull girder.
船底板构成船体梁的下翼缘板，是主要的纵向构件。
3
This paper researches the plane stiffness of new composite structure for slab on the lowerflange, which is compared with the traditional structure for the slab on the top flange.