MT-1620 al.2002 Idealize the cross-section of the shell beam into two parts Parts that carry extensional stress, O(and thus the bending and axial loads Parts that carry shear stress Oxs(and thus the shear loads and torques TWo examples again igh aspect ratio wing with semi-monocoque construction Notes monocoque construction all in one piece without internal framing from French "coque" meaning" eggshell “mono”= one plece seml-monocoque stressed skin construction with internal framework still have "eggshell to carry shear stresses, o internal framework to carry axial stress,O Paul A Lagace @2001 Unit 15-3MIT - 16.20 Fall, 2002 Idealize the cross-section of the shell beam into two parts: • Parts that carry extensional stress, σxx (and thus the bending and axial loads) • Parts that carry shear stress σxs (and thus the shear loads and torques) Two examples again… • high aspect ratio wing with semi-monocoque construction Notes: • monocoque construction • – all in one piece without internal framing • – from French “coque” meaning “eggshell” • – “mono” = one piece • semi-monocoque – stressed skin construction with internal framework – still have “eggshell” to carry shear stresses, σxs – internal framework to carry axial stress, σxx Paul A. Lagace © 2001 Unit 15 - 3