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    Optimization of a heavy-duty elevated thin shell structure
    (2022-08-01)
    Nassir, Azizah Abdul
    ;
    Min, Yee Hooi
    ;
    Petchsasithon, Arthit
    ;
    Senin, Syahrul Fithry
    Optimization means the mathematical determination of the optimal decisions out of diverse alternatives. Based on the preceding Finite Element Analysis (FEA), a proposed shell produced a maximum stress that exceeded the design value. To make the design feasible, an optimization was done to minimize the maximum stress by using the gradient method. The performance of the structure can be optimized to fulfil the design requirements with the optimum value of displacement to achieve the objective function. The results show that the optimum displacement is 8.8mm, which reduced the maximum stress by 99.94% from the initial level. Thus, optimization methods are important for new applications of shell structures to find their best parameters in the design stage.
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    A study of polarizationâ⠬ maintaining fiber characteristics with applications to force and displacement sensing
    (1995-01-01)
    Yupapin, P. V.P.
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    Weir, K.
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    Grattan, K. T.V.
    ;
    Palmer, A. W.
    An experimental investigation of three different types of highly birefringent fiber sensor element configured as a force and a displacement sensor is described. From the coupling of power between the two eigenmodes, the magnitude of the force and the position of the coupling point can then be determined using ‘white‐light interferometric’ techniques. © 1995, Laser Institute of America. All rights reserved.