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Home Science News Marine

Study Reveals How Layers of Synthetic Materials Work Together for Enhanced Performance

May 16, 2025
in Marine
Reading Time: 4 mins read
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Illinois Professor Shelly Zhang, center, with fellow researchers Rahul Dev Kundu, left, and Shi Zhao, right.
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In an extraordinary leap forward for materials science, researchers at the University of Illinois Urbana-Champaign have unveiled a groundbreaking synthetic material that emulates the complex multilayered architecture of natural seashells. This innovative design harnesses the power of programmed layers, each responding uniquely to applied stress, enabling the collaborative dissipation of energy far beyond what traditional single-layer materials achieve. The revolutionary concept opens the door for adaptive, resilient materials with applications spanning from automotive safety to advanced wearable technologies.

Inspired by millions of years of biological evolution, marine organisms like mollusks construct protective shells composed of multiple mineralized layers, each optimized to endure different forms of mechanical force. Unlike homogeneous materials, these natural composites exhibit nonlinear and multistage responses to stress, allowing them to absorb and redirect energy in complex ways. Reproducing these qualities synthetically has been a persistent challenge, primarily due to the lack of precise control over individual layer behaviors and their interactions.

The team, led by Professor Shelly Zhang of the University of Illinois Urbana-Champaign’s Civil and Environmental Engineering department together with Ole Sigmund from the Technical University of Denmark, has pioneered an inverse design framework that programs both the material properties of individual layers and their microscale interconnections. This computationally driven approach enables a continuum setup where each layer’s nonlinear stress-strain response is meticulously optimized to not only perform in isolation but also to collaborate dynamically within the multilayered matrix, thereby greatly expanding the design space over previous methodologies relying on single layers or lattice-based structures.

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Their study, recently published in Science Advances, details how the multilayered synthetic material exhibits extreme nonlinear behavior by undergoing programmed sequential buckling during mechanical loading. Traditional materials typically exhibit linear or monotonic deformation until failure, but this engineered material transitions through multiple well-defined mechanical phases, dissipating energy progressively. By harnessing the intrinsic coupling between layers, the system adapts its response level to the severity of the applied stress, mimicking the adaptive protective function seen in natural nacre.

A crucial aspect of this work lies in the computational simulation and modeling techniques employed to design the multilayered composites. The team used inverse design principles, a process where desired overall material behavior guides the iterative optimization of microstructural parameters and layer connections. This approach allowed them to decipher how to distribute stiffness, strength, and buckling thresholds across layers to realize a collective, nonlinear response unheard of in single-material designs.

Fabricating such intricately programmed materials presented formidable challenges. Theoretically, the design targets an infinitely periodic structure to maximize the consistency of mechanical response, but practical fabrication is limited to finite unit assemblies. This difference between theory and reality manifested as observable discrepancies in buckling sequences and deformation patterns during experimental validation. However, rather than viewing these variations as setbacks, the team cleverly exploited them as embedded information carriers, effectively encoding mechanical data within the material’s response and enabling a feedback loop for further optimization.

Videos accompanying the research vividly illustrate the experimental processes, highlighting how each cellular component undergoes a distinct buckling event. This sequential activation not only spreads energy dissipation over time but also stores recoverable strain energy, an attribute vital for applications requiring reversible deformation or repeated impact resistance. By decoding this mechanical information, researchers can fine-tune layer interactions and program the assembly for targeted performance under specific conditions.

The potential applications of this technology are vast and transformative. Automotive safety could benefit from multilayered bumpers that adapt their energy absorption depending on collision severity, improving passenger protection while reducing material waste and repair costs. In wearable medical technology, bandages or supports made from such materials could dynamically adjust stiffness and compliance to protect injuries without compromising comfort or mobility, opening new frontiers in personalized healthcare.

Looking forward, scaling up the fabrication process remains a challenge due to the intricate microscale programming required. Nevertheless, the insights gained from this interdisciplinary collaboration underscore the power of collective work—both in biological systems and in human endeavors—and spotlight a new paradigm where engineered materials are no longer passive but actively responsive and programmable.

Professor Zhang emphasizes that the strength of the design lies in the synergy of layers acting in concert rather than isolation. This holistic material behavior transcends classical limits of material science and paves the way for a future where smart, adaptive materials can revolutionize countless industries. The research team’s work continues to bridge the boundary between biology-inspired design and advanced engineering, setting the stage for unprecedented innovation.

Moreover, the research highlights the critical role of microscale interconnections in dictating macroscopic material properties. Instead of relying solely on chemical composition or bulk geometry, the programmed interfaces between layers serve as mechanical communication pathways, coordinating responses to external stimuli. This insight opens new possibilities for multifunctional materials that can sense, adapt, and even recover from damage by leveraging embedded mechanical intelligence.

Lastly, this study exemplifies the fertile ground where computational modeling meets experimental fabrication. By closing the loop between design, synthesis, and testing, the researchers established a robust methodology capable of iteratively improving material performance. This approach not only accelerates material discovery but also establishes a new toolkit for engineering the next generation of smart composites tailored for specific, dynamic applications.

The University of Illinois Urbana-Champaign, known for its cutting-edge engineering research and interdisciplinary collaboration, continues to lead in the quest to mimic and surpass nature’s materials by transforming ancient biological wisdom into futuristic technologies.


Subject of Research: Multilayered synthetic materials with programmable nonlinear mechanical responses inspired by natural nacre.

Article Title: Extreme nonlinearity by layered materials through inverse design.

News Publication Date: 16-May-2025.

Web References:

  • Study DOI: 10.1126/sciadv.adr6925
  • Prof. Shelly Zhang Profile: https://cee.illinois.edu/directory/profile/zhangxs
  • University of Illinois Urbana-Champaign Civil and Environmental Engineering: https://cee.illinois.edu/

References:
Zhang, S., Sigmund, O., et al. (2025). Extreme nonlinearity by layered materials through inverse design. Science Advances, DOI: 10.1126/sciadv.adr6925.

Image Credits: Photo by Fred Zwicky.

Keywords: biomimicry, multilayered materials, synthetic nacre, nonlinear mechanics, inverse design, programmable composites, energy absorption, mechanical buckling, adaptive materials, material optimization, computational modeling, microscale interconnections.

Tags: adaptive resilient materialsadvanced wearable technology applicationsautomotive safety materialsbiological inspiration in engineeringenergy dissipation in materialsinverse design framework for materialsmaterials science breakthroughsmechanical stress response in materialsmultilayered material architecturenatural seashell emulationprogrammed layer designsynthetic materials innovation
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