Introduction to Aircraft Structural Analysis (Elsevier Aerospace Engineering)

426 CHAPTER 15 Bending of Open and Closed, Thin-Walled Beams

Fig.15.4

Bending of a symmetrical section beam.

Fig.15.5

Length of beam subjected to a pure bending moment.

hassufferedastrainεzwhichisgivenby

εz=

changeinlength

originallength

Then,

εz=

(R−y)δθ−δz

δz

thatis,

εz=

(R−y)δθ−Rδθ

Rδθ