Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published May 15, 2017 | Supplemental Material
Journal Article Open

Damage-induced mechanical damping in phase-transforming composites materials


We investigate the influence of stress-induced damage on the effective viscoelastic response of two-phase composites having constituents that undergo solid-solid phase transitions. Such composites are prone to experience damage near the interfaces separating phase-transforming inclusions and the non-transforming matrix. By accounting for inelasticity, temperature-induced phase transitions, and damage in the individual constituents and applying techniques of computational homogenization, we numerically show that the observed damage and resulting decrease in matrix stiffness can lead to significant changes in the overall, frequency-dependent damping and dynamic stiffness of the composite under time-harmonic two-dimensional loading. This is of particular interest since recent experiments and simulations hinted at increased composite damping due to metastable states of phase-transforming inclusions when embedded in a stiff matrix (so-called negative stiffness). Experiments also reported signs of matrix degradation, the causal mechanisms and consequences of which have not been investigated. The homogenized material response reported here reveals the interplay of material viscosity, matrix degradation, and structural transition, and illustrates how phase transformation and localized damage may lead to pronounced effective damping and stiffness variations.

Additional Information

© 2017 Elsevier Ltd. Received 26 November 2016. Revised 11 January 2017. Accepted 24 January 2017. Available online 25 January 2017.

Attached Files

Supplemental Material - mmc1.mp4

Supplemental Material - mmc2.mp4


Files (692.0 kB)
Name Size Download all
336.2 kB Download
355.8 kB Download

Additional details

August 21, 2023
October 25, 2023