Bi-material sinusoidal beam-based temperature responsive multistable metamaterials

Meng, Zhiqiang; Qin, Wenxiu; Mei, Tie; Chen, Chang

doi:10.1016/j.ijsolstr.2023.112343

Cited by 14 publications

(2 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These properties are usually reversal of common senses, such as negative Poisson's ratio [1,2], negative stiffness [3,4], negative swelling behavior [5], and negative refraction [6,7]. Furthermore, some studies demonstrated how to tune or induce the properties of metamaterials after they are manufactured using temperature [8][9][10], magnetic fields [11], air pressure [12], and other methods, thus achieving more diverse applications. Thanks to the development of rapid prototyping, especially additive manufacturing, it is possible to fabricate metamaterials with intricate designed microstructures [13,14].…”

Section: Introductionmentioning

confidence: 99%

Reversible negative compressibility metamaterials inspired by Braess’s Paradox

Zha,

Zhang

2024

Smart Mater. Struct.

View full text Add to dashboard Cite

Negative compressibility metamaterials have attracted significant attention due to their distinctive properties and promising applications. Negative compressibility has been interpreted in two ways. Regarding the negative compressibility induced by a uniaxial load, it can only occur abruptly when the load reaches a certain threshold. Hence, it can be termed as transient negative compressibility. However, fabrication and experiments of such metamaterials have rarely been reported. Herein, we demonstrate them. Inspired by Braess’s paradox, a novel mechanical model is proposed with reversible negative compressibility. It shows multiple types of force responses during a loading-unloading cycle, including transient negative compressibility and hysteresis. Phase diagrams are employed to visualize the relationship between force responses and system parameters. Besides, explicit expressions for the conditions and intensity of negative compressibility are obtained for design and optimization. The model replacement method inspired by compliant mechanism design is then introduced to derive specific unit cell structures, thus avoiding intuition-based approaches. Additive manufacturing technology is utilized to fabricate the prototypes, and negative compressibility is validated via simulations and experiments. Furthermore, it is demonstrated that metamaterials with transient negative compressibility can be activated through electrical heating and can function as actuators, thereby possessing machine-like properties. The proposed mechanical metamaterial and the introduced design methodology have potentials to impact micro-electromechanical systems, force sensors, protective devices, and other applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Reversible negative compressibility metamaterials inspired by Braess’s Paradox

Zha,

Zhang

2024

Smart Mater. Struct.

View full text Add to dashboard Cite

show abstract

“…By integrating structural geometry design with the stimulate-response properties of SMMs, the unit cell configuration of lattice structures can be transformed, thereby further adjusting the properties or functions of structures. Recently, numerous reconfigurable structures based on SMMs have been investigated, including thermally tunable elastic modulus structures [18], elastic wave band gap tunable structures [19,20], multiple deformation mode tunable structures [21], Poisson's ratio adjustable structures [22], monostable-bistable switching metamaterials [23], reusable energy absorption structures [24,25], etc.…”

Section: Introductionmentioning

confidence: 99%

Shape memory polymer lattice structures with programmable thermal recovery time

Ji,

Zhang,

Guo

2024

Smart Mater. Struct.

View full text Add to dashboard Cite

Shape memory polymer (SMP) lattice structures have garnered considerable attention due to their intrinsic capability for self-recovery and mechanical reconfiguration. The temporal path, encompassing aspects such as recovery time and deployment sequence, of the shape recovery process in SMP lattice structures holds paramount significance across various domains, including but not limited to medical devices and space deployable structures. Nonetheless, the programming of shape recovery time or deployment sequences in SMP lattice structures, particularly in scenarios devoid of external controllers, remains a challenge. In addressing these challenges, this study presents a novel class of SMP structures endowed with customizable thermal recovery times and programmable deployment sequences, leveraging the influence of structural geometry. Notably, the programmable recovery time and serialized deployment behavior of the proposed SMP lattice structure are achieved within a constant temperature environment, obviating the need for external time-varying stimuli. Finite element simulations and experimental validations corroborate that the proposed SMP structures can be programmed to exhibit recovery times spanning from mere seconds to several hundred seconds. Moreover, a three-stage sequential recovery behavior is attained without necessitating prior local configuration programming. Furthermore, exploiting the distinctive sequential reversibility inherent in a constant high-temperature environment, the designed lattice structure showcases the ability to transition to multiple distinct stable configurations by modulating the duration of high-temperature exposure. The proposed recovery time programmable SMP lattice structure thus presents a viable avenue for realizing intricate multistage controllable shape-shifting structures devoid of external control equipment.

show abstract