Failure mode and effects analysis

Beam (structure)

Engineering

Materials science

Rebar

Shear (geology)

Displacement (psychology)

Bending

Physics

Psychology

Psychotherapist

Composite material

Structural engineering

Critical ionization velocity

Mechanics

International Journal of Impact Engineering

It has been experimentally observed that the failure mode of RC beams can change from bending to shear as impact velocity increases. In this note, the effect of impact velocity on the response and failure of a RC beam is studied numerically using a recently developed dynamic constitutive model for concrete. Furthermore, an analytical equation is proposed to define critical condition for the transition of failure modes in the RC beam subjected to impact loading. It transpires that the numerical results are in good agreement with the experimental observations in terms of load-displacement curve, crack pattern and transition of failure mode. It also transpires that the analytical equation can predict the transition of failure mode in the RC beam and that different strain rate sensitivities (namely, dynamic increase factors or DIFs) of rebar steels (bending and shear reinforcements) and concrete are responsible for the transition of failure modes in RC beams from bending to shear as impact velocity increases.

Effect of impact velocity on the failure modes of a RC beam