Structural analyses of wooden chairs by finite element method (FEM) and assessment of the cyclic loading performance in comparison with allowable design loads
Structural analyses of wooden chairs by finite element method (FEM) and assessment of the cyclic loading performance in comparison with allowable design loads
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DOI：
10.4067/s0718-221x2021000100419
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发表时间：
2021-01-01
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影响因子：
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通讯作者：
Kasal, Ali
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文献类型：
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作者：
Ceylan, Erkan;Güray, Ersan;Kasal, Ali
对樟子松（Pinus sylvestris）和东方山毛榉（Fagus orientalis）建造的座椅进行了循环荷载试验。总共有30把真实的尺寸的椅子用聚醋酸乙烯酯粘合剂组装。根据美国图书馆协会（ALA）规范，对座椅在前后、前后和靠背3个方向上进行了循环加载试验，并将所得座椅的加载性能与允许设计载荷水平进行了交叉检验。此外，通过使用有限元法将试样作为结构进行分析，以获得在载荷下作用于每个构件的轴向、剪切和弯曲应力，并将这些值与设计应力进行比较。结果表明，有限元分析方法可以合理地估计座椅的强度性能和破坏行为。根据美国图书馆协会允许的设计载荷，山毛榉制成的椅子可以满足前向后和后向前载荷的中等使用，而靠背载荷的重型使用。在松木椅子的情况下，他们可以满足中等服务的前到后和后到前加载，而轻服务的靠背加载。
Tests were carried out to investigate the cyclic loading performance of chairs constructed of Scotch pine (Pinus sylvestris) and Oriental beech (Fagus orientalis). Totally, 30 real size chairs were constructed and assembled with polyvinyl acetate adhesive. Chairs were tested under 3 cyclic loading directions; namely, front to back, back to front, and backrest according to American Library Association (ALA) specifications, and obtained loading performances of chairs were crosschecked with allowable design load levels. Additionally, specimens were analyzed as structures by using the finite element method in order to obtain axial, shear, and bending stresses acting on each member under loadings and compare these values with design stresses. As a result, it was concluded that finite element method analyses achieve reasonable estimates for strength performances and failure behaviors of chairs. Depending on allowable design loads by American Library Association; chairs constructed of beech could meet the medium service for front to back and back to front loading, while heavy service for backrest loading. In the case of pine chairs; they could meet the medium service for front to back and back to front loading, while light service for backrest loading.