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\begin{document}

\title{Mechanical properties of the rocky interiors of icy moons}



\author[1]{Cassandra Seltzer}%
\author[1]{Hamed O Ghaffari}%
\author[2]{Matěj Peč}%
\affil[1]{Massachusetts Institute of Technology}%
\affil[2]{MIT EAPS}%


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  \date{May 27, 2024}


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\begin{abstract}
Icy moons in the outer Solar System contain rocky, chondritic interiors,
but this material is rarely studied under confining pressure. The
contribution of rocky interiors to deformation and heat generation is
therefore poorly constrained. We deformed LL6 chondrites at confining
pressures [?] 100 MPa and quasistatic strain rates, and recorded acoustic
emissions (AEs) using ultrasound probes. We defined a failure envelope,
measured ultrasonic velocities, and retrieved elastic moduli for the
experimental conditions. Chondritic material stiffened with increasing
confining pressure, and reached its peak strength at 50 MPa confining
pressure. Microcracking events occurred at low stresses, during
nominally ``elastic'' deformation, indicating that dissipative processes
are possible in rocky interiors. These events were most energetic at
lower differential stresses, and occurred more frequently at lower
confining pressures. We suggest that chondritic interiors of icy moons
are therefore stronger, less compliant, and less dissipative with
increasing pressure and size.%
\end{abstract}%



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