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Structural Engineering and Mechanics   Volume 2, Number 2, June 1994, pages 141-156
DOI: https://doi.org/10.12989/sem.1994.2.2.141
 
Failure mechanisms of a rigid-perfectly plastic cantilever with elastic deformation at its root subjected to tip pulse loading
B. Wang

 
Abstract     [Buy Article]
    In this paper, the effect of material elasticity was evaluated through a simple model as proposed by Wang and Yu (1991), for yield mechanisms of a cantilever beam under tip pulse loading. The beam was assumed rigid-perfectly plastic but instead of the usual fully clamped constraints at its root, an elastic-perfectly plastic rotational spring was introduced there so the system had a certain capacity to absorb elastic energy. Compared with a rigid-perfectly plastic beam without a spring root, the present beam-spring model showed differences in the initial plastic hinge position and the minimum magnitude of the dynamic force needed to produce a plastic failure. It was also shown that various failure responses may happen while the hinge travels along the beam segment towards the root, rather than a unique response mode as in a rigid perfectly plastic analysis.
 
Key Words
    pipe whip; plastic hinge; impact; elasticity.
 
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School of Mechanical and Production Engineering, Nanyang Technological University, Singapore 2263, Singapore
 

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