Abstract
This paper investigates the failure load prediction of anisogrid cylindrical composite lattice structures under axial compression. The failure criterion to predict compressive failure load of lattice structure is developed by using the compression test results of representative subelement specimens including several unit cells. Compression tests of subelement using two different fixture jigs which generate different ratio of bending to compressive stress in the knot region of lattice structures were performed. The critical stress function is introduced from the compression test results and is utilized in failure criterion. The finite element analysis is used to calculate the failure load with the proposed failure criterion and also the buckling load for the full-sized cylindrical lattice structures. The compression failure loads for two different full-sized cylindrical lattice structures agreed well with the predicted failure loads by using the failure criterion proposed in this paper. The results of these studies indicate that the proposed failure criterion for the cylindrical composite lattice structures under compressive load in this work can be applied to the stress analysis and optimization problem in the preliminary design phase.
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This work was supported by the Civil-Military Technology Cooperation Program (Development of the Composite Lattice Structure, 15-CM-MA-12).
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Min-Hyeok Jeon is a Ph.D. student of Department of Aerospace Engineering, Chungnam National University, Daejeon, Republic of Korea. His research interests include strength and instability of composite cylinder and testing and analysis of composite materials.
In-Gul Kim is a Professor of Department of Aerospace Engineering, Chungnam National University, Daejeon, Republic of Korea. He received his Ph.D. in Engineering Science & Mechanics from Pennsylvania State University. His research interests include impact behavior of composite materials, structural health monitoring, and design and testing of composite structures.
Seung-Taek Kong is a M.S. student of Department of Aerospace Engineering, Chungnam National University, Daejeon, Republic of Korea. His research interests include buckling characteristics of metallic cylinder considering initial imperfection.
Sang-Woo Lee is a Managing Director of Hankuk Fiber Co., Miryang, Republic of Korea. His research interests include manufacturing process, testing and prior technology research for composite structures.
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Jeon, MH., Kong, ST., Kim, IG. et al. Failure load prediction of anisogrid cylindrical composite lattice structures using failure criterion based on ratio of bending to compressive stress. J Mech Sci Technol 35, 4897–4906 (2021). https://doi.org/10.1007/s12206-021-1008-z
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DOI: https://doi.org/10.1007/s12206-021-1008-z