Failure mode and effects analysis

Composite number

Engineering

Buckling

Materials science

Operating system

Flange

Computer science

Pultrusion

Mathematics

Geometry

Composite material

Structural engineering

Mode (computer interface)

International Journal of Solids and Structures

Column buckling is a major design concern for pultruded composite columns. Interaction between the local (flange) and global (Euler) buckling modes occurs in intermediate length thin-walled columns with near coincident buckling loads. The interaction of more than one buckling mode induce an unstable tertiary post-buckling path, causing imperfection sensitivity and premature failure. In this work, the existence of buckling-mode interaction is experimentally verified for intermediate length pultruded wide-flange columns subjected to uniaxial compression. Characterization of the interaction mode is done using both conventional testing techniques and the shadow moiré optical technique, allowing for non-contact, full field measurement of the buckling modes.

Experimental verification of buckling-mode interaction in intermediate-length composite columns