Three-point bending behaviors of sandwich beams with data-driven 3D auxetic lattice core based on deep learning

IF 6.3 2区 材料科学 Q1 MATERIALS SCIENCE, COMPOSITES
Xi Fang, Hui-Shen Shen, Hai Wang
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引用次数: 0

Abstract

In this paper, flexural behavior of a novel sandwich beam featuring a 3D auxetic lattice core developed using an inverse design method powered by deep learning under three-point bending is investigated. Specifically, the bending behavior and effective Poisson’s ratio (EPR) of such beams under large deflection is demonstrated. With inverse design method based on conditional generative deep learning model, finite element analysis (FEA) results indicate that the sandwich beams with data-driven auxetic core have superior bending behavior compared to those obtained through forward topology optimization in previous studies. In order to validate the mechanical performances of data-driven 3D auxetic lattice structures and further explore the influence of incline angle on the EPR, experimental tests under uniform pressure are carried out with metal specimens fabricated through selective laser melting manufacturing process. Comprehensive FE simulations, incorporating analytical model and temperature-dependent material properties explore the effect of various factors on the bending behavior and EPR as the beam undergoes large deflection. Results demonstrate that functionally graded configurations, length-to-thickness ratio, facesheet-to-core thickness ratio, truss radii, and thermal environmental conditions will significantly affect the flexural behavior and EPR of the data-driven sandwich beam.
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来源期刊
Composite Structures
Composite Structures 工程技术-材料科学:复合
CiteScore
12.00
自引率
12.70%
发文量
1246
审稿时长
78 days
期刊介绍: The past few decades have seen outstanding advances in the use of composite materials in structural applications. There can be little doubt that, within engineering circles, composites have revolutionised traditional design concepts and made possible an unparalleled range of new and exciting possibilities as viable materials for construction. Composite Structures, an International Journal, disseminates knowledge between users, manufacturers, designers and researchers involved in structures or structural components manufactured using composite materials. The journal publishes papers which contribute to knowledge in the use of composite materials in engineering structures. Papers deal with design, research and development studies, experimental investigations, theoretical analysis and fabrication techniques relevant to the application of composites in load-bearing components for assemblies, ranging from individual components such as plates and shells to complete composite structures.
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