Techno Press

Steel and Composite Structures   Volume 25, Number 4, November20 2017, pages 403-413
Multi-objective durability and layout design of fabric braided braking hose in cyclic motion
J.R. Cho and Y.H. Kim

Abstract     [Full Text]
    The fabric braided braking hose that delivers the driver\'s braking force to brake cylinder undergoes the large deformation cyclic motion according to the steering and bump/rebound motions of vehicle. The cyclic large deformation of braking hose may give rise to two critical problems: the interference with other adjacent vehicle parts and the micro cracking stemming from the fatigue damage accumulation. Hence, both the hose deformation and the fatigue damage become the critical issue in the design of braking hose. In this context, this paper introduces a multi-objective optimization method for minimizing the both quantities. The total length of hose and the helix angles of fabric braided composite layers are chosen for the design variables, and the maximum hose deformation and the critical fatigue life cycle are defined by the individual single objective functions. The trade-off between two single objective functions is made by introducing the weighting factors. The proposed optimization method is validated and the improvement of initial hose design is examined through the benchmark simulation. Furthermore, the dependence of optimum solutions on the weighting factors is also investigated.
Key Words
    fabric braided rubber hose; cyclic motion; multi-objective optimization; durability and deformed layout; helix angle and hose length
J.R. Cho: Department of Naval Architecture and Ocean Engineering, Hongik University, Sejong 339-701, Korea
Y.H. Kim: Graduate School of Mechanical Engineering, Pusan National University, Busan 609-735, Korea

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