Calculation bending deflection and stress for corrugated core sandwich panels employing equivalent stiffness method
ObjectivesIn order to develop a computation method for the corrugated core panel bending issue and solve the bending deflection and stress of such panels, an equivalent stiffness method is proposed. MethodsFirst, the middle cores of these sandwich panels are taken as equivalent to orthotropic elasti...
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Editorial Office of Chinese Journal of Ship Research
2021-04-01
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Online Access: | http://www.ship-research.com/cn/article/doi/10.19693/j.issn.1673-3185.01873 |
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doaj-c2a77d4bae884139aff83183906571ee2021-07-08T07:20:29ZengEditorial Office of Chinese Journal of Ship ResearchZhongguo Jianchuan Yanjiu1673-31851673-31852021-04-01162909810.19693/j.issn.1673-3185.018731873Calculation bending deflection and stress for corrugated core sandwich panels employing equivalent stiffness methodXiaoming WANG0Qiang WEI1Man PAN2China Ship Development and Design Center, Wuhan 430064, ChinaChina Ship Development and Design Center, Wuhan 430064, ChinaChina Ship Development and Design Center, Wuhan 430064, ChinaObjectivesIn order to develop a computation method for the corrugated core panel bending issue and solve the bending deflection and stress of such panels, an equivalent stiffness method is proposed. MethodsFirst, the middle cores of these sandwich panels are taken as equivalent to orthotropic elastic materials, then the equivalent elastic modulus of the cores are solved by Castigliano's theorem and the integral stiffnesses of the sandwich panels are calculated by laminated plate theory. According to the solved integral stiffness constants, the distribution of bending deflection is achieved by solving the orthotropic plate bending equilibrium equations, and stress distribution is derived by adopting Hooke's law.ResultsIt is validated that the stiffness error evaluated by this proposed method is −6.98% compared with the method in literature(Ref.[7]), the maximum error of deflection is −2.01% and stress is 3.63%, which correspond with the FEM results.ConclusionsThis proposed method for calculating integral stiffness through layered accumulation not only avoids the complicated derivation of applying the method of Ref.[7] completely, but also satisfies calculation precision when computing the bending issue.http://www.ship-research.com/cn/article/doi/10.19693/j.issn.1673-3185.01873corrugated core sandwich panelsequivalent stiffnessbending deformationbending stressequivalent modulus |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Xiaoming WANG Qiang WEI Man PAN |
spellingShingle |
Xiaoming WANG Qiang WEI Man PAN Calculation bending deflection and stress for corrugated core sandwich panels employing equivalent stiffness method Zhongguo Jianchuan Yanjiu corrugated core sandwich panels equivalent stiffness bending deformation bending stress equivalent modulus |
author_facet |
Xiaoming WANG Qiang WEI Man PAN |
author_sort |
Xiaoming WANG |
title |
Calculation bending deflection and stress for corrugated core sandwich panels employing equivalent stiffness method |
title_short |
Calculation bending deflection and stress for corrugated core sandwich panels employing equivalent stiffness method |
title_full |
Calculation bending deflection and stress for corrugated core sandwich panels employing equivalent stiffness method |
title_fullStr |
Calculation bending deflection and stress for corrugated core sandwich panels employing equivalent stiffness method |
title_full_unstemmed |
Calculation bending deflection and stress for corrugated core sandwich panels employing equivalent stiffness method |
title_sort |
calculation bending deflection and stress for corrugated core sandwich panels employing equivalent stiffness method |
publisher |
Editorial Office of Chinese Journal of Ship Research |
series |
Zhongguo Jianchuan Yanjiu |
issn |
1673-3185 1673-3185 |
publishDate |
2021-04-01 |
description |
ObjectivesIn order to develop a computation method for the corrugated core panel bending issue and solve the bending deflection and stress of such panels, an equivalent stiffness method is proposed. MethodsFirst, the middle cores of these sandwich panels are taken as equivalent to orthotropic elastic materials, then the equivalent elastic modulus of the cores are solved by Castigliano's theorem and the integral stiffnesses of the sandwich panels are calculated by laminated plate theory. According to the solved integral stiffness constants, the distribution of bending deflection is achieved by solving the orthotropic plate bending equilibrium equations, and stress distribution is derived by adopting Hooke's law.ResultsIt is validated that the stiffness error evaluated by this proposed method is −6.98% compared with the method in literature(Ref.[7]), the maximum error of deflection is −2.01% and stress is 3.63%, which correspond with the FEM results.ConclusionsThis proposed method for calculating integral stiffness through layered accumulation not only avoids the complicated derivation of applying the method of Ref.[7] completely, but also satisfies calculation precision when computing the bending issue. |
topic |
corrugated core sandwich panels equivalent stiffness bending deformation bending stress equivalent modulus |
url |
http://www.ship-research.com/cn/article/doi/10.19693/j.issn.1673-3185.01873 |
work_keys_str_mv |
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1721313831911686144 |