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Mechanics of Transient Systems

Mechanics and function of materials and devices as they degrade.

Experimental images and computational models of a transient device at days 0, 20, and 40, showing progressive degradation.

Coupled degradation and mechanics simulations track the changing substrate and interconnect strains of a bioresorbable pacemaker. Comparison with dissolution experiments supports predictions of device behavior over its transient lifetime.

Pei Liu, Ali Garmroudi, Zhengwei Li, Raudel Avila. System-level transient simulation of bioresorbable and flexible electronic circuits. npj Flexible Electronics (2026). Article in press.

Schematic of a bioresorbable cardiac device and the contrasting evolution of modulus or stiffness over time in everlasting and transient systems.

Transient mechanics examines how the modulus and stiffness of bioresorbable electronics evolve during degradation. Material selection and mechanical design can tailor these changes to support temporary implants over a controlled operational lifetime.

Pei Liu, Chihtong Lee, Nicole Carusetta, Raudel Avila. Transient Mechanics: A Perspective on Bioresorbable Electronics. Journal of Applied Mechanics 92, 051007 (2025).