This preview shows pages 1–6. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: AERSP 301 Structural Idealization Jose Palacios October 2009 Combined C/Ss Combined C/Ss We looked at open and closed sections separately. For combined open and closed sections we can use everything we learned so far, with one exception. Bending the direct stress calculations and bending deflections do not depend on the c/s type Shear solve problems in the same manner. Shear diagram Torsion torisonal stiffness for closed c/s is much greater than that of an open c/s, therefore we can ignore the open c/s in the calculation of torsional stiffness. Structural Idealization Structural Idealization Consider the twospar wing section shown. The stringers and spar carry most of the direct stresses while the skin carries the shear stresses. Since variation in stress over the stringer or spar flange due to bending of the wing would be small, it can be assumed to be constant. Structural Idealization Structural Idealization Stingers and spar flanges can then be replaced by concentrations of areas known as booms. It can be assumed that all direct stresses are carried by booms and the skin carries only shear. Direct stress carrying capacity of the skin may be accounted for by increasing the boom crosssection area. Structural Idealization Structural Idealization If skin does carry direct stress, we idealize it as a section that carries only shear stress, and add effective area to the booms....
View Full
Document
 '09
 GANDHI,FARHANLESIEUTRE,GEORGE

Click to edit the document details