TY - GEN
T1 - Efficient 3D stress capture of variable-stiffness and sandwich beam structures
AU - Patni, Mayank
AU - Minera, Sergio
AU - Groh, Rainer M.J.
AU - Pirrera, Alberto
AU - Weaver, Paul M.
N1 - Publisher Copyright:
© 2019 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.
PY - 2019
Y1 - 2019
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85083942896&partnerID=8YFLogxK
U2 - 10.2514/6.2019-1763
DO - 10.2514/6.2019-1763
M3 - Conference contribution
AN - SCOPUS:85083942896
SN - 9781624105784
T3 - AIAA Scitech 2019 Forum
BT - AIAA Scitech 2019 Forum
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - AIAA Scitech Forum, 2019
Y2 - 7 January 2019 through 11 January 2019
ER -