Superlative mechanical energy absorbing efficiency discovered through self-driving lab-human partnership

Kelsey L. Snapp, Benjamin Verdier, Aldair E. Gongora, Samuel Silverman, Adedire D. Adesiji, Elise F. Morgan, Timothy J. Lawton, Emily Whiting and Keith A. Brown ()
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Kelsey L. Snapp: Boston University
Benjamin Verdier: Boston University
Aldair E. Gongora: Boston University
Samuel Silverman: Boston University
Adedire D. Adesiji: Boston University
Elise F. Morgan: Boston University
Timothy J. Lawton: US Army Combat Capabilities Development Command Soldier Center
Emily Whiting: Boston University
Keith A. Brown: Boston University

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract Energy absorbing efficiency is a key determinant of a structure’s ability to provide mechanical protection and is defined by the amount of energy that can be absorbed prior to stresses increasing to a level that damages the system to be protected. Here, we explore the energy absorbing efficiency of additively manufactured polymer structures by using a self-driving lab (SDL) to perform >25,000 physical experiments on generalized cylindrical shells. We use a human-SDL collaborative approach where experiments are selected from over trillions of candidates in an 11-dimensional parameter space using Bayesian optimization and then automatically performed while the human team monitors progress to periodically modify aspects of the system. The result of this human-SDL campaign is the discovery of a structure with a 75.2% energy absorbing efficiency and a library of experimental data that reveals transferable principles for designing tough structures.

Date: 2024
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DOI: 10.1038/s41467-024-48534-4

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