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| A novel post-processing method for predicting the interlaminar shear stresses of laminated plates |
| Received:December 05, 2020 Revised:December 29, 2020 |
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| DOI：10.7511/jslx20201205003 |
| KeyWord:post-processing method laminated plate refined zigzag theory interlaminar stresses plate element |
| Author | Institution |
| 杨胜奇 |
大连理工大学 工程力学系 工业装备结构分析国家重点实验室, 大连 |
| 刘书田 |
大连理工大学 工程力学系 工业装备结构分析国家重点实验室, 大连 |
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| Abstract: |
| Laminated plates are typical bearing members in the aerospace industry.Excessive interlaminar shear stresses are the main cause of delamination failure.The accurate prediction of the interlaminar shear stresses often depends on the post-processing method (TPM) for three-dimensional equilibrium equations.However,this method needs to calculate the first derivative of the in-plane stresses,so that simple linear element based on the C0 plate theories cannot use TPM to calculate the transverse shear stresses.Based on the TPM,a novel post-processing method (NPM) is proposed in this paper.The NPT eliminates the high-order derivative of displacement parameters generated in the TPM through the Virtual Work Equivalent Method (VWEM).So,accurate transverse shear stresses can be obtained by linear elements using the NPT and C0 plate theories.To verify the effectiveness of the NPT,an efficient C0-continuous three-node triangular plate element is formulated based on the refined zigzag theory (RZT) and the NPM.Numerical examples show that the proposed NPM have the same calculation accuracy as the TPM,and the proposed plate element can accurately and efficiently predict the transverse shear stresses of laminates.In addition,the NPM is very easy to use in combination with existing commercial finite element software.Based on the nodal displacements obtained by the plate and shell elements in commercial software,the NPM can easily obtain accurate interlaminar shear stresses. |
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