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Structural Engineering and Mechanics Volume 2, Number 2, June 1994, pages 141-156 DOI: http://dx.doi.org/10.12989/sem.1994.2.2.141 |
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Failure mechanisms of a rigid-perfectly plastic cantilever with elastic deformation at its root subjected to tip pulse loading |
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B. Wang
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| Abstract | ||
| 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. | ||
| Address | ||
| School of Mechanical and Production Engineering, Nanyang Technological University, Singapore 2263, Singapore | ||