热带胶合木细长梁弯扭稳定性的非线性分析

IF 1.4 4区工程技术 Q3 ENGINEERING, MECHANICAL

Journal of Strain Analysis for Engineering Design Pub Date : 2023-11-01 DOI:10.1177/03093247231204645

Louis Elvis Bikanda, René Oum Lissouck, Morel Junior Angouah Massaga, Louis Max Ayina Ohandja

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引用次数: 0

摘要

本文的主要目的是用有限元法模拟热带胶合木细长梁的弯扭屈曲。提出了量化木梁屈曲强度和横向几何特征的非线性方法。采用了一种非常严格的方法，即基于运动学弗拉索夫理论，通过考虑更新的拉格朗日描述来确定梁截面的位移场。对于有限元的离散化，作者建立了具有14个自由度的单一木单元，即每个节点7个自由度，并利用虚功原理推导出非线性刚度矩阵。在MatLab中对模型进行了实现，并将数值计算结果与基于经典细木梁线性稳定性理论的计算结果进行了比较。所选择的案例研究是悬臂梁和双支撑梁。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Non-linear analysis of the flexural-torsional stability of slender tropical glulam beams

The main objective of this manuscript is to model the flexural-torsional buckling of slender tropical glulam beams using the finite element method. The non-linear approach to quantify both the buckling strength and the lateral geometrical features of wooden beams is proposed. A very rigorous methodology is used which is based on the kinematic Vlasov’s theory to determine the displacement field of the beam section by considering an updated Lagrangian description. For the finite element discretization, the Author develop a single wood element characterized by 14 degrees of freedom, i.e. seven degrees for each nodal point, and derive non-linear stiffness matrices by using the virtual works principle. The model is implemented in MatLab and the numerical results are compared with results based on the classical linear stability theory of slender wood beams. The selected case-studies are a cantilever beam and a beam on two supports.

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来源期刊

Journal of Strain Analysis for Engineering Design 工程技术-材料科学：表征与测试

CiteScore

3.50

自引率

6.20%

发文量

审稿时长

>12 weeks

期刊介绍： The Journal of Strain Analysis for Engineering Design provides a forum for work relating to the measurement and analysis of strain that is appropriate to engineering design and practice. "Since launching in 1965, The Journal of Strain Analysis has been a collegiate effort, dedicated to providing exemplary service to our authors. We welcome contributions related to analytical, experimental, and numerical techniques for the analysis and/or measurement of stress and/or strain, or studies of relevant material properties and failure modes. Our international Editorial Board contains experts in all of these fields and is keen to encourage papers on novel techniques and innovative applications." Professor Eann Patterson - University of Liverpool, UK This journal is a member of the Committee on Publication Ethics (COPE).