Study on compressive stress relaxation behavior of beech based on the finite element method

Abstract: The compressive stress relaxation behaviors in three directions of beech (Fagus orientalis) were studied by experiments, and predicted by mechanical model and finite element method. Firstly, short-term (3 hours) compressive stress relaxation experiments were carried out in longitudinal (L)...

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Autores principales:	Hu,Wen Gang, Guan,Hui Yuan
Lenguaje:	English
Publicado:	Universidad del Bío-Bío 2019
Materias:	Fagus orientalis maxwell model mechanical properties modulus of elasticity wood structures.
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2019000100015
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spelling	oai:scielo:S0718-221X20190001000152019-06-04Study on compressive stress relaxation behavior of beech based on the finite element methodHu,Wen GangGuan,Hui Yuan Fagus orientalis maxwell model mechanical properties modulus of elasticity wood structures. Abstract: The compressive stress relaxation behaviors in three directions of beech (Fagus orientalis) were studied by experiments, and predicted by mechanical model and finite element method. Firstly, short-term (3 hours) compressive stress relaxation experiments were carried out in longitudinal (L), radical (R) and tangential (T) directions of beech, and then the experimental data was fitted by mechanical model with two single Maxwell bodies in parallel connection. Secondly, the method of predicting the long-term (12 hours) stress relaxation behaviors of beech based on the finite element method was studied using the experimental data of short-term stress relaxation. Finally, the long-term stress relaxation behaviors in three directions of beech were investigated by experiments, mechanical model and finite element method respectively, and the results of them were compared. The results showed that stress relaxation behaviors of beech were different in three directions, and the short-term stress relaxation in L was much smaller than those in R and T directions under the same load. Besides, the mechanical model with two single Maxwell bodies in parallel connection was capable of predicting the short-term relaxation behaviors of beech in three directions with correlation coefficients beyond 0,99 but it did not work in long-term relaxation. In addition, the errors of FEM were smaller than those of the mechanical model compared with the results of experiments in the long-term stress relaxation, and the errors of the FEM were approximately 8% in L and 20% in R and T directions, which were all accepted in the field of wood engineer. This study will contribute to predict the long-term relaxation behaviors of wood products and wooden structures based on the FEM.info:eu-repo/semantics/openAccessUniversidad del Bío-BíoMaderas. Ciencia y tecnología v.21 n.1 20192019-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2019000100015en10.4067/S0718-221X2019005000102
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Fagus orientalis maxwell model mechanical properties modulus of elasticity wood structures.
spellingShingle	Fagus orientalis maxwell model mechanical properties modulus of elasticity wood structures. Hu,Wen Gang Guan,Hui Yuan Study on compressive stress relaxation behavior of beech based on the finite element method
description	Abstract: The compressive stress relaxation behaviors in three directions of beech (Fagus orientalis) were studied by experiments, and predicted by mechanical model and finite element method. Firstly, short-term (3 hours) compressive stress relaxation experiments were carried out in longitudinal (L), radical (R) and tangential (T) directions of beech, and then the experimental data was fitted by mechanical model with two single Maxwell bodies in parallel connection. Secondly, the method of predicting the long-term (12 hours) stress relaxation behaviors of beech based on the finite element method was studied using the experimental data of short-term stress relaxation. Finally, the long-term stress relaxation behaviors in three directions of beech were investigated by experiments, mechanical model and finite element method respectively, and the results of them were compared. The results showed that stress relaxation behaviors of beech were different in three directions, and the short-term stress relaxation in L was much smaller than those in R and T directions under the same load. Besides, the mechanical model with two single Maxwell bodies in parallel connection was capable of predicting the short-term relaxation behaviors of beech in three directions with correlation coefficients beyond 0,99 but it did not work in long-term relaxation. In addition, the errors of FEM were smaller than those of the mechanical model compared with the results of experiments in the long-term stress relaxation, and the errors of the FEM were approximately 8% in L and 20% in R and T directions, which were all accepted in the field of wood engineer. This study will contribute to predict the long-term relaxation behaviors of wood products and wooden structures based on the FEM.
author	Hu,Wen Gang Guan,Hui Yuan
author_facet	Hu,Wen Gang Guan,Hui Yuan
author_sort	Hu,Wen Gang
title	Study on compressive stress relaxation behavior of beech based on the finite element method
title_short	Study on compressive stress relaxation behavior of beech based on the finite element method
title_full	Study on compressive stress relaxation behavior of beech based on the finite element method
title_fullStr	Study on compressive stress relaxation behavior of beech based on the finite element method
title_full_unstemmed	Study on compressive stress relaxation behavior of beech based on the finite element method
title_sort	study on compressive stress relaxation behavior of beech based on the finite element method
publisher	Universidad del Bío-Bío
publishDate	2019
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2019000100015
work_keys_str_mv	AT huwengang studyoncompressivestressrelaxationbehaviorofbeechbasedonthefiniteelementmethod AT guanhuiyuan studyoncompressivestressrelaxationbehaviorofbeechbasedonthefiniteelementmethod
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Study on compressive stress relaxation behavior of beech based on the finite element method

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