Science· 2014Q1
Ultralight, ultrastiff mechanical metamaterials
- 2,256citations
- Q1SCImago
- 2014year
Short summary
Researchers have developed a new class of microarchitected materials that maintain high stiffness per unit mass even at extremely low densities, overcoming a common limitation of lightweight materials.
AI-generated from the title and abstract; the full text is not read.
Key points
- Developed microarchitected materials with nearly constant stiffness per unit mass density across a wide density range.
- Achieved ultrastiff properties by designing microscale unit cells with high structural connectivity and nanoscale features.
- Structural members are optimized to carry loads in tension or compression.
- Materials can be made from polymers, metals, or ceramics using projection microstereolithography and nanoscale coating.
AI-generated from the title and abstract; the full text is not read.
Abstract
The mechanical properties of ordinary materials degrade substantially with reduced density because their structural elements bend under applied load. We report a class of microarchitected materials that maintain a nearly constant stiffness per unit mass density, even at ultralow density. This performance derives from a network of nearly isotropic microscale unit cells with high structural connectivity and nanoscale features, whose structural members are designed to carry loads in tension or compression. Production of these microlattices, with polymers, metals, or ceramics as constituent materials, is made possible by projection microstereolithography (an additive micromanufacturing technique) combined with nanoscale coating and postprocessing. We found that these materials exhibit ultrastiff properties across more than three orders of magnitude in density, regardless of the constituent material.
The authors' abstract, as published at the source. Science, 2014 · DOI ↗
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Field: Mechanical Engineering
Mechanical EngineeringEngineering