Читать книгу Properties for Design of Composite Structures - Neil McCartney - Страница 42

Plane strain bending conditions are characterised by a zero transverse strain everywhere in the beam so that ε¯T=ε^T=0. It is also assumed that σA=σt=ΔT=0. It then follows that the relations (2.235), (2.236), (2.240) and (2.241) reduce to

(2.249)

(2.250)

(2.251)

indicating the value of the transverse bending moment that must be applied to the beam to ensure plane strain conditions. It is noted from (2.250) that E˜A may be interpreted as a plane strain bending modulus.

This completes the description of the fundamental theoretical concepts that will be required by subsequent chapters of this book.