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A useful guide of effective mesh-size decision in predicting the ultimate strength of flat-and curved plates in compression

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Journal of Ocean Engineering and Science 2023年第4期8卷 401-417页

作者： Do Kyun Kim Imjun Ban Bee Yee Poh Sung-Chul Shin Department of Naval Architecture and Ocean Engineering College of EngineeringSeoul National UniversitySeoulSouth Korea Research Institute of Marine Systems Engineering Seoul National UniversitySeoulKorea Group of Marine Offshore and Subsea Technology(MOST)School of EngineeringNewcastle UniversityNewcastle upon TyneUK Department of Naval Architecture and Ocean Engineering Pusan National UniversityBusanSouth Korea Ocean and Ship Technology Research Group Department of Civil and Environmental EngineeringPETRONAS University of TechnologySeri IskandarPerakMalaysia

The present study aims to determine the appropriate size of mesh or the number of the element(NoE)for flat-and curved plates,which is suggested to assess its safety subjected to axial compression based on the ultimate limit state(ULS)design and analysis *** unstiffened panel(=plate)and stiff-ened panel,considered primary members of ships and ship-shaped offshore structures,are subjected to repeated axial compression and tension caused by continued vertical bending moments applied to the hull *** are attached with stiffeners by welding,and 6,8 or 10 elements are generally rec-ommended to allocate in flat-plate’s breadth direction in between stiffeners for finite-element(FE)mod-elling,which enables the presentation of the shape of initial deflection applied to the *** the case of the load-shorting curve for curved plate,it is reported that the nonlinear behaviour characteristics,i.e.,snap-through,snap-back,secondary buckling and others,appear in typical flank *** take this into account,we investigated the preferred number of elements(6,8 or 10)generally applied to the flat plate whether it is an appropriate or more fine-sized element(or mesh)that should be considered.A useful guide is documented based on obtained outcomes which may help structural engineers select optimised mesh-size to predict ultimate strength and understand its characteristic of the flat and curved plates.

关键词： Ultimate strength Unstiffened panel Longitudinal compression mesh convergence Finite-element method

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An instrument for methodological quality assessment of single-subject finite element analysis used in computational orthopaedics

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Medicine in Novel Technology and Devices 2021年第3期11卷 113-119页

作者： Duo Wai-Chi Wong Tony Lin-Wei Chen Yinghu Peng Wing-Kai Lam Yan Wang Ming Ni Wenxin Niu Ming Zhang Department of Biomedical Engineering Faculty of EngineeringThe Hong Kong Polytechnic UniversityHong KongChina The Hong Kong Polytechnic University Shenzhen Research Institute ShenzhenChina Guangdong Provincial Engineering Technology Research Center for Sports Assistive Devices Guangzhou Sport UniversityGuangzhouChina Department of Kinesiology Shenyang Sport UniversityShenyangChina Li Ning Sports Science Research Center Li Ning(China)Sports Goods CompanyBeijingChina Department of Orthopaedics Pudong New Area Peoples’Hospital Affiliated to Shanghai University of Medicine and Health SciencesShanghaiChina Department of Rehabilitation Medical College of Tongji UniversityShanghaiChina

The methodological quality of subject-specific finite element analysis papers depends on the rigor of the study design and detailed description of key elements,while assessment instruments are often confined to clinical trials or *** study aims to present an instrument for methodological quality assessment of singlesubject finite element analysis used in computational orthopaedics(MQSSFE).Based upon existing instruments and relevant review papers,a pilot version was developed consisting of 37 items with 6 domains,including study design and presentation of findings,subject recruitment,model reconstruction and configuration,boundary and loading conditions(simulation),model verification and validation,and model assumption and *** interviewed four experts in the field to assess the face validity and refined the *** instrument was tested for interrater reliability among two assessors on nine finite element study ***,the criterion validity was evaluated by comparing the similarity of the MQSSFE and the modified Down and Black *** intraclass correlation coefficient was 0.965,while the MQSSFE was significantly moderately correlated with the modified Down and Black instruments(r=0.61).We believed that MQSSFE was adequately appropriate,reliable,and valid for assessing the methodological quality for finite element studies used in computational *** instrument could facilitate quality assessment in the systematic reviews of finite element models and checklists for fidelity.

关键词： Finite element model Simulation Validation and verification mesh convergence Uncertainty analysis

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