A novel stress analysis method for composite Z-stiffeners under mechanical and thermal loads
A closed-form analytical solution is developed for analyzing laminated composite beam with asymmetric Z cross-section. The explicit expressions for evaluating sectional properties such as centroid, shear center, equivalent bending/torsional stiffness and warping stiffness are formulated based upon m...
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Veröffentlicht in: | Journal of Composite Materials 2019-11, Vol.53 (26-27), p.3807-3818 |
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creator | Lu, WT Singh, S Chan, WS |
description | A closed-form analytical solution is developed for analyzing laminated composite beam with asymmetric Z cross-section. The explicit expressions for evaluating sectional properties such as centroid, shear center, equivalent bending/torsional stiffness and warping stiffness are formulated based upon modified lamination theory and taken into consideration of the structural deformation characteristics of beam with narrow section. The ply stresses of flanges and web laminates are computed for composite Z-stiffener under axial, bending, and torsional loads. The present results give excellent agreement with the results from ANSYS™. A parametric study of their centroid and shear center with various layup sequences was performed by using the developed solution. It is found that the sectional properties are not only dependent of structural configuration but also the laminate property. Moreover, these properties are only dependent of structural configuration if the entire Z-stiffener is made of the same family laminates regardless their ply orientation and stacking sequence. It is concluded that the present approach is a viable and efficient method for designing composite Z-stiffener. |
doi_str_mv | 10.1177/0021998319846947 |
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The explicit expressions for evaluating sectional properties such as centroid, shear center, equivalent bending/torsional stiffness and warping stiffness are formulated based upon modified lamination theory and taken into consideration of the structural deformation characteristics of beam with narrow section. The ply stresses of flanges and web laminates are computed for composite Z-stiffener under axial, bending, and torsional loads. The present results give excellent agreement with the results from ANSYS™. A parametric study of their centroid and shear center with various layup sequences was performed by using the developed solution. It is found that the sectional properties are not only dependent of structural configuration but also the laminate property. Moreover, these properties are only dependent of structural configuration if the entire Z-stiffener is made of the same family laminates regardless their ply orientation and stacking sequence. 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The explicit expressions for evaluating sectional properties such as centroid, shear center, equivalent bending/torsional stiffness and warping stiffness are formulated based upon modified lamination theory and taken into consideration of the structural deformation characteristics of beam with narrow section. The ply stresses of flanges and web laminates are computed for composite Z-stiffener under axial, bending, and torsional loads. The present results give excellent agreement with the results from ANSYS™. A parametric study of their centroid and shear center with various layup sequences was performed by using the developed solution. It is found that the sectional properties are not only dependent of structural configuration but also the laminate property. Moreover, these properties are only dependent of structural configuration if the entire Z-stiffener is made of the same family laminates regardless their ply orientation and stacking sequence. 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The explicit expressions for evaluating sectional properties such as centroid, shear center, equivalent bending/torsional stiffness and warping stiffness are formulated based upon modified lamination theory and taken into consideration of the structural deformation characteristics of beam with narrow section. The ply stresses of flanges and web laminates are computed for composite Z-stiffener under axial, bending, and torsional loads. The present results give excellent agreement with the results from ANSYS™. A parametric study of their centroid and shear center with various layup sequences was performed by using the developed solution. It is found that the sectional properties are not only dependent of structural configuration but also the laminate property. Moreover, these properties are only dependent of structural configuration if the entire Z-stiffener is made of the same family laminates regardless their ply orientation and stacking sequence. 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title | A novel stress analysis method for composite Z-stiffeners under mechanical and thermal loads |
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