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Mathematical Problems in Engineering
Volume 2015, Article ID 485710, 7 pages
http://dx.doi.org/10.1155/2015/485710
Research Article

The Failure Criterion of Single-Layer Spherical Lattice Shell Based on Kinetic Energy

Spatial Structures Research Center, Beijing University of Technology, Beijing 100124, China

Received 25 April 2015; Accepted 7 July 2015

Academic Editor: Dapeng P. Du

Copyright © 2015 Panfeng Ba et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The dynamic failure criterion of single-layer spherical lattice shells has been an important research subject. The paper examines dynamic failures of single-layer spherical lattice shells and proposes the structure dynamic failure criterion based on the kinetic energy. The failure criterion was demonstrated through the dynamic failure test on a single-layer spherical lattice shell. Then, simulation analysis was carried out through two cases with material damage taken into account. The proposed failure criterion can accurately identify failure moments caused either by strength fracture or by stability fracture.