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This is a In Vitro Study study (also classified as: Observational).

A multifunctional mechanical metamaterial with adjustable density, stiffness, Poisson’s ratio, and thermal expansion

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This research reveals a mechanical metamaterial with tunable density and thermal expansion, indicating its potential for energy-efficient design.

Adjusting geometric parameters can achieve lightweight characteristics and adaptability, with a negative Poisson's ratio.
The study demonstrated that a combination of geometric design and material distribution allows for multi-parameter control.
Analytical solutions and finite element simulation were used to investigate the effective properties of the metamaterial.
These multifunctional capabilities suggest significant potential in applications like flexible devices and thermal management.

Tian et al. (2025) studied this question.

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This research reveals a mechanical metamaterial with tunable density and thermal expansion, indicating its potential for energy-efficient design.