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E. Reissner, Y. Stavsky (1961)
Bending and Stretching of Certain Types of Heterogeneous Aeolotropic Elastic PlatesJournal of Applied Mechanics, 28
(1976)
Оценка податливости и жесткости несбалансированных моноклинных композиций [Estimation of ductility and stiffness for unbalan ced monoclinic composites
(2002)
Ievads sl āņaino materi ālu un konstrukciju meh ānikā [Introduction in the laminated material and construction mechanics
(2006)
Stability of the shape of anticlastic composi te material sheet under variable moisture conditions // Proceedings of the 5 th International Conference of DAAAM Baltic
S. Tsai, N. Pagano (1968)
INVARIANT PROPERTIES OF COMPOSITE MATERIALS.
A. Baikovs (2006)
Stability of the shape of anticlastic composite material sheet under variable moisture conditions
(1969)
Primer on com posite materials analysis
Prediction of the shape changes of hybrid laminated composite material sheet The preservation of the initial shape of anticlastic composite material sheets by using reinforced plastic strengthening has been investigated in the work. For the modelling of sheet deformations the calculation model, developed by the authors, has been used for the determination of the thickness of anticlastic sheet rational strengthening, which provides changes of the original bending radius within the limits of preferable intervals under variable moisture conditions (1), as well as the finite element method, carried out by software ANSYS v.11 (henceforth FEM). The changes of the sheet bending radii and longitudinal deformations in the geometrical middle plane of unstrengthened sheet are assumed to be the main characteristics of the shape. Stresses and longitudinal deformations have been calculated in the layers of the hybrid composite material element under variable moisture conditions using FEM. The comparative research of the results calculated with the FEM and the developed calculation model showed that the difference between the results in the inspected three cases, when the composite timber material are strengthened on the top, bottom and both sides, does not exceed 3.3% for none of the cases. An opportunity has been demonstrated how to provide the original shape of anticlastic timber composite material sheets by using glass fibre reinforced plastic strengthening under variable moisture conditions, thus not exceeding the difference of 5%. The developed calculation model is proposed for the use in the predicting of curvature if the elements with the anticlastic shape are obtained by using the displacements of moisture changes in the layers of the sheet.
RTU Construction Science – de Gruyter
Published: Jan 1, 2009
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