MT-1620 al.2002 n= constant tension force per unit length [lbs/in[/ ook at this from the side igure 11.2 side view of membrane under pressure over cutout [ib/:] [N/m] Assume: lateral displacements( w) are small such that no appreciable changes in n occur We want to take equilibrium of a small element dwdW assume small angles ax'ay Paul A Lagace @2001 Unit 11-p 3MIT - 16.20 Fall, 2002 N = constant tension force per unit length [lbs/in] [N/M] Look at this from the side: Figure 11.2 Side view of membrane under pressure over cutout Assume: lateral displacements (w) are small such that no appreciable changes in N occur. We want to take equilibrium of a small element: ∂w ∂w (assume small angles ∂x , ∂y ) Paul A. Lagace © 2001 Unit 11 - p. 3