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Structural Engineering and Mechanics Volume 9, Number 2, February 2000 , pages 111-126 DOI: https://doi.org/10.12989/sem.2000.9.2.111 |
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Dynamic nonlinear member failure propagation in truss structures |
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Malla RB, Nalluri BB
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| Abstract | ||
| Truss type structures are attractive to a variety of engineering applications on earth as well as in space due to their high stiffness to mass ratios and ease of construction and fabrication. During the service life, an individual member of a truss structure may lose load carrying capacity due to many reasons, which may lead to collapse of the structure. An analytical and computational procedure has been developed to study the response of truss structures subject to member failure under static and dynamic loadings. Emphasis is given to the dynamic effects of member failure and the propagation of local damage to other parts of the structure. The methodology developed is based on nonlinear finite element analysis technique and considers elasto-plastic material nonlinearity, postbuckling of members, and large deformation geometric nonlinearity. The pseudo force approach is used to represent the member failure. Results obtained for a planar nine-bay indeterminate truss undergoing sequential member failure show that failure of one member can initiate failure of several members in the structure. | ||
| Key Words | ||
| truss structures, progressive failure, dynamic member failure, dynamic nonlinear analysis, buckling, post-buckling response, member failure propagation | ||
| Address | ||
| Malla RB, Univ Connecticut, Dept Civil & Environm Engn, Storrs, CT 06269 USA Univ Connecticut, Dept Civil & Environm Engn, Storrs, CT 06269 USA GM Corp, Electromot Div, Lagrange, IL 60525 USA | ||