Research Article| August 01, 2013 Mechanical spectroscopy in twinned minerals: Simulation of resonance patterns at high frequencies† Ekhard K.H. Salje; Ekhard K.H. Salje * 1Department of Earth Sciences, University of Cambridge, Cambridge CB2 3EQ, U.K.2State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China *E-mail: ekhard@esc.cam.ac.uk Search for other works by this author on: GSW Google Scholar Ziyuan Zhao; Ziyuan Zhao 2State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China Search for other works by this author on: GSW Google Scholar Xiangdong Ding; Xiangdong Ding 2State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China Search for other works by this author on: GSW Google Scholar Jun Sun Jun Sun 2State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China Search for other works by this author on: GSW Google Scholar Author and Article Information Ekhard K.H. Salje * 1Department of Earth Sciences, University of Cambridge, Cambridge CB2 3EQ, U.K.2State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China Ziyuan Zhao 2State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China Xiangdong Ding 2State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China Jun Sun 2State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China *E-mail: ekhard@esc.cam.ac.uk Publisher: Mineralogical Society of America Received: 05 Dec 2012 Accepted: 16 Apr 2013 First Online: 02 Mar 2017 Online ISSN: 1945-3027 Print ISSN: 0003-004X © 2013 Mineralogical Society of America American Mineralogist (2013) 98 (8-9): 1449–1458. https://doi.org/10.2138/am.2013.4433 Article history Received: 05 Dec 2012 Accepted: 16 Apr 2013 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Ekhard K.H. Salje, Ziyuan Zhao, Xiangdong Ding, Jun Sun; Mechanical spectroscopy in twinned minerals: Simulation of resonance patterns at high frequencies. American Mineralogist 2013;; 98 (8-9): 1449–1458. doi: https://doi.org/10.2138/am.2013.4433 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyAmerican Mineralogist Search Advanced Search Abstract Computer molecular dynamics (MD) simulations of dynamically driven twin structures reveal the main results of resonance ultrasonic spectroscopy (RUS) and dynamic mechanical analysis (DMA), namely the high-friction damping at low frequencies, and underdamped oscillations at high frequencies. High-frequency spectra show absorption, which relates to phonon heating of the sample and phase shifts between the applied dynamical strain field and the geometrical movements inside the microstructure. Two main excitations have been identified to describe this behavior. The first is the progression and retraction of needle twins, the second is the movement of kinks inside twin boundaries. The dynamical response of these excitations has been simulated over large frequency and amplitude regions. It is shown that propagations of needle twins and kinks have a propensity to irreversibility when needles completely retract and destroy themselves and when kinks disappear at the sample surface. These movements lead to macroscopic “jerks” or spikes in the heat content of the sample. At higher frequencies, all movements become oscillatory with very small amplitudes, which, below a cut-off of one lattice unit, are simple phonon vibrations. These movements are continuous and do not contribute to the jerk-spectra. The connection between the simulated microstructures and the dynamical elastic measurements are discussed. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.