25Skin-stringeranalysis0

25Skin-stringeranalysis0 - AAE352 Lecture 25 Skin-stringer...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
AAE 352 1 AAE352 Lecture 25 Skin-stringer idealizations Reading – Class notes, Chapter 7
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
AAE 352 2 Summary • Shear stress develops on beam cross- sections and also longitudinally because the bending moment changes • Shear flows are tangent to thin webs • Relations developed thus far assume that there is no twist – load is applied at the shear center.
Background image of page 2
The way things started AAE 352 3
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Germany was first – The Junkers F-13 AAE 352 4
Background image of page 4
Function of Aircraft Structures AAE 352 5 The structures of most flight vehicles are thin walled structures (shells) Resists applied loads (Aerodynamic and inertial loads acting on the wing structure) Provides the aerodynamic shape Protects the contents from the environment Adolph Rohrbach
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Skin functions AAE 352 6 Skin reacts the external applied torsion and shear forces Skin transmits aerodynamic forces to the longitudinal and transverse supporting members acts with the longitudinal members in resisting the applied bending and axial loads\ acts with the transverse members in reacting the hoop, or circumferential, load when the structure is pressurized.
Background image of page 6
Stiffeners and stringers AAE 352 7 resist bending and axial loads along with the skin divide the skin into small panels and thereby increase its buckling and failing stresses act with the skin in resisting axial loads caused by pressurization.
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Skin-stringer modeling sub-divide load carrying functions AAE 352 8 Upper Wing Skin Lower Wing Skin Web Web Stiffener (Stringer/Spar Cap) y z h Red areas resist only normal stresses Thin areas resist only shear So what?
Background image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/18/2012 for the course AAE 352 taught by Professor Chen during the Fall '08 term at Purdue.

Page1 / 35

25Skin-stringeranalysis0 - AAE352 Lecture 25 Skin-stringer...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online