What does this research mean for the field?

Nonlinear Neo-Hookean material models provide superior correlation with experimental data for predicting the Poisson's ratio and mechanical response of 3D-printed auxetic metamaterials compared to linear elastic models, particularly for larger unit cell configurations. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

Investigate the Poisson’s ratio behavior of 3D-printed auxetic lattice structures across varied unit cell dimensions, strut lengths, and inclination angles using combined experimental and numerical methods.

August 22, 2026Mechanics of Advanced Materials and Structures

Improved evaluation of Poisson’s ratio in 3D-printed auxetic metamaterials using finite element and experimental methods

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Authors

VVV. Chaithanya Vinay JYJeffrey P. Youngblood DVD. S. Mohan Varma

Discussion

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Overview

Experimental and computational study reveals nonlinear models accurately predict Poisson's ratio in 3D-printed auxetic lattices, highlighting methods to customize metamaterial designs.

Key Points

Investigate the Poisson’s ratio behavior of 3D-printed auxetic lattice structures across varied unit cell dimensions, strut lengths, and inclination angles using combined experimental and numerical methods.
Designed auxetic lattices with varying unit cell sizes (3 × 3, 4 × 4, and 5 × 5 mm³), strut lengths (1.25 and 1.9 mm), and inclination angles (60° and 70°) in CAD, then fabricated them via stereolithography from photopolymer resin.
Assessed compressive deformation experimentally via optical image analysis and conducted finite element simulations using both linear elastic and nonlinear Neo-Hookean material models in ABAQUS.
Nonlinear Neo-Hookean material models demonstrated superior agreement with experimental Poisson’s ratio values compared to linear elastic models, particularly for larger unit cell configurations.
Structural geometry directly governed mechanical behavior, with larger unit cell configurations undergoing more uniform deformation and providing closer alignment between simulated and experimental results.

Cite This Study

Vinay et al. (2026) studied this question.

synapsesocial.com/papers/6a895effca7ade938187d51c https://doi.org/10.1080/15376494.2026.2717644

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August 22, 2026Mechanics of Advanced Materials and Structures

Improved evaluation of Poisson’s ratio in 3D-printed auxetic metamaterials using finite element and experimental methods

View Full Paper

Ask AI

Bookmark

Authors

VVV. Chaithanya Vinay JYJeffrey P. Youngblood DVD. S. Mohan Varma

Discussion

Member takes

Overview

Experimental and computational study reveals nonlinear models accurately predict Poisson's ratio in 3D-printed auxetic lattices, highlighting methods to customize metamaterial designs.

Key Points

Investigate the Poisson’s ratio behavior of 3D-printed auxetic lattice structures across varied unit cell dimensions, strut lengths, and inclination angles using combined experimental and numerical methods.
Designed auxetic lattices with varying unit cell sizes (3 × 3, 4 × 4, and 5 × 5 mm³), strut lengths (1.25 and 1.9 mm), and inclination angles (60° and 70°) in CAD, then fabricated them via stereolithography from photopolymer resin.
Assessed compressive deformation experimentally via optical image analysis and conducted finite element simulations using both linear elastic and nonlinear Neo-Hookean material models in ABAQUS.
Nonlinear Neo-Hookean material models demonstrated superior agreement with experimental Poisson’s ratio values compared to linear elastic models, particularly for larger unit cell configurations.
Structural geometry directly governed mechanical behavior, with larger unit cell configurations undergoing more uniform deformation and providing closer alignment between simulated and experimental results.

Cite This Study

Vinay et al. (2026) studied this question.

synapsesocial.com/papers/6a895effca7ade938187d51c https://doi.org/10.1080/15376494.2026.2717644

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