Efficient 3D stress capture of variable-stiffness and sandwich beam structures

Mayank Patni, Sergio Minera, Rainer M.J. Groh, Alberto Pirrera, Paul M. Weaver

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Accurate modeling of composite structures is important for safe application under different loading conditions. To provide accurate predictions of three-dimensional (3D) stress fields in an efficient computational framework, we employ a modeling approach that builds upon the recently developed hierarchical Serendipity Lagrange finite elements. The approach provides Layer-Wise (LW) and Equivalent Single-Layer (ESL) models for analyzing constant-and variable-stiffness laminated beam structures. To enhance the capability of the ESL model, two existing Zig-Zag (ZZ) functions, namely Murakami’s ZZ function (MZZF) and the Refined ZZ theory function (RZT), are used. For constant-stiffness laminated and sandwich beams, the RZT ZZ function more accurately predicts the structural response than the MZZF. However, for variable-stiffness laminated structures the applicability of RZT is still unknown and its accuracy is therefore tested within the present formulation. Results obtained are validated against 3D closed-form and 3D Finite Element (FE) solutions available in the literature. For similar levels of accuracy, significant gains in computational efficiency are achieved over 3D FE and LW models by using the ESL approach with RZT ZZ functions.

Original languageEnglish
Title of host publicationAIAA Scitech 2019 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105784
DOIs
Publication statusPublished - 2019
EventAIAA Scitech Forum, 2019 - San Diego, United States
Duration: 7 Jan 201911 Jan 2019

Publication series

NameAIAA Scitech 2019 Forum

Conference

ConferenceAIAA Scitech Forum, 2019
Country/TerritoryUnited States
CitySan Diego
Period7/01/1911/01/19

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