Stable Characteristics Optimization of Anti-Symmetric Cylindrical Shell with Laminated Carbon Fiber Composite

Abstract

This paper proposes a multi-objective optimization model for anti-symmetric cylindrical shell in the bionic gripper structure. Here, the response surface method is used to establish multiple surrogate models of the anti-symmetric cylindrical shell, and the non-dominated sorting genetic algorithm-II (NSGA-II) is used to optimize the design space of the anti-symmetric cylindrical shell; the design points of the anti-symmetric cylindrical shell are verified by experimental methods. The optimization goals are that the first steady state transition load (the transition process of the bionic gripper structure from the open state to the closed state) of the anti-symmetric cylindrical shell is minimized, and the second steady state transition load (the transition process of the bionic gripper structure from the closed state to the open state) is the largest. At the same time, in order to prevent stable instability caused by stress concentration in the second steady state of the anti-symmetric cylindrical shell, the maximum principal plane stress is given as the constraint condition. The validity of the optimization results is verified by finite element and experimental methods. Due to the stable transition load of the anti-symmetric cylindrical shell being significantly larger than that of the orthogonal laminated plate, therefore, the anti-symmetric cylindrical shell has potential application prospects in the application of deformable structures and bionic structures that require composite functions such as having light weight, high strength, and large clamping force. The novelty of this paper lies in the multi-objective optimization of the application of the antisymmetric bistable cylindrical shell in the bionic gripper structure.

Multi-optimization for thermal deformation of gravitational wave telescope based on CFRP characteristics

“…Experiments comparing ultra-low expansion CFRP with Zerodur have shown the significant potential of unconventional layups to reduce structural thermal deformation. However, in many studies, a specific layer is often selected as the variable θ, and an exhaustive method is then employed to evaluate the design [21][22][23] . While this method can identify a CFRP laminate that meets the requirements, it is inefficient and might not yield the optimal layup.…”

Multi-optimization for thermal deformation of gravitational wave telescope based on CFRP characteristics

“…Experiments comparing ultra-low expansion CFRP with Zerodur have shown the significant potential of unconventional layups to reduce structural thermal deformation. However, in many studies, a specific layer is often selected as the variable θ, and an exhaustive method is then employed to evaluate the design 22 – 24 . While this method can identify a CFRP laminate that meets the requirements, it is inefficient and might not yield the optimal layup.…”

Effects of process parameters on mechanical properties and interface of 3D printed bamboo‐inspired CCFR‐PLA/TPU composites

“…[16][17][18][19][20] Among them, CFR composites, in particular, have been extensively studied for their superior mechanical properties. However, the manufacturing methods for CFR composites, such as traditional lamination, 21 winding, 22 and weaving, 23,24 involve complex processes, high costs, and long cycles. Additive manufacturing technology, known for its low cost and flexibility, offers a new way for the preparation of CFR composite parts.…”