Abstract
Transverse compression (ring deflection) tests were simulated in composite tubes through nonlinear finite element models based on a modified Riks algorithm, which uses the arc-length method. Progressive failure was evaluated in detail through a proposed damage model, able to identify the failure mode. In all composite tubes tested, localized stress concentration points developed in the transverse plane caused by contact load plates/composite, producing non-linearity in the load vs. displacement curves (P-). The failure mode of these tubes involves a complex combination of mechanisms, namely transverse tensile, transverse compression and in-plane shear stresses, where the region of the specimen in contact with the load plates present the most damaged area. Thus, matrix tensile and matrix compression induced by shear near the loading zones dominate damage and failure of the specimens. Buckling and post-buckling of tubes are highly influenced by the fiber orientation, whereas the tube with reinforcement orientation parallel to the loading plates-to-specimens contact line withstanding the highest buckling load level. On the other hand, specimens wound at [±45]5 and [±75]5 present a divergence point, since they support a portion of the load after buckling is reached, characterizing a post-buckling behavior.
| Original language | English |
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| Title of host publication | Proceedings of the 20th International Conference on Composite Materials (ICCM20) |
| Place of Publication | Copenhagen |
| Number of pages | 10 |
| Publication status | Published - 19 Jul 2015 |
| Externally published | Yes |
| Event | 20th International Conference on Composite Materials - Copenhagen, Denmark Duration: 19 Jul 2015 → 24 Jul 2015 http://www.iccm20.org/ |
Conference
| Conference | 20th International Conference on Composite Materials |
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| Abbreviated title | ICCM20 |
| Country/Territory | Denmark |
| City | Copenhagen |
| Period | 19/07/2015 → 24/07/2015 |
| Internet address |