A mixed design approach for probabilistic structural durability |
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| Authors: | X Yu K K Choi K -H Chang |
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| Affiliation: | (1) Center for Computer-Aided Design and Department of Mechanical Engineering, College of Engineering, The University of Iowa, 52245 Iowa City, IA, USA;(2) Present address: Engineering Department, CSAR Corporation, 28035 Dorothy Drive, 91301 Agoura Hills, CA, USA;(3) Present address: Department of Mechanical Engineering, Northern Illinois University, 61105-2854 DeKalb, IL, USA |
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| Abstract: | In this paper, a mixed approach for probabilistic structural durability design of mechanical systems is proposed. In this approach, a deterministic design optimization that considers structural crack initiation and crack propagation lives at critical points of the structural component as design constraints is performed first. After an optimal design is obtained, a reliability analysis is performed to ascertain if the deterministic optimal design is reliable. If the probability of the failure of the deterministic optimal design is found to be acceptable, a reliability-based design approach that employs a set of interactive design steps, such as trade-off analysis and what-if study, is used to obtain a near-optimal design that is reliable with an affordable computational cost. A 3-D tracked vehicle roadarm is employed to demonstrate the feasibility of the proposed approach. |
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