research

In this paper we revisit the mathematical foundations of nonlinear viscoelasticity.

Sharing for the benefit of those who are interested: A new technical paper co-authored by researchers at the JAXA: Japan Aerospace Exploration Agency, The University of Tokyo and CYBERNET SYSTEMS CO.,LTD., was published in the Aerospace - a free-access journal by MDPI. The authors reckon that the study will provide a guideline for effective designs of high-performance lattice structures with architected materials.

"S15: Advanced modelling techniques: Higher-order continua" organised by Samuel Forest (Mines ParisTech CNRS) and Lorenzo Bardella (University of Brescia) http://emmc19.org/symposium-s15.html  

Abstract submission deadline: December 22nd, 2023, http://emmc19.org/submissions.html

In this paper, we present a large-deformation formulation of the mechanics of remodeling. Remodeling is anelasticity with an internal constraint---material evolutions that are mass and volume-preserving.  In this special class of material evolutions, the explicit time dependence of the energy function is via one or more remodeling tensors that can be considered as internal variables of the theory. The governing equations of remodeling solids are derived using a two-potential approach and the Lagrange-d'Alembert principle.

Journal Club for October 2023: Dynamic Behavior of Ceramics, Ceramic Composites, and Structures: Experimental and Computational Mechanics to Inform Advanced Manufacturing

Authors (alphabetical by last name): James D. Hogan*, Haoyang Li, Saman Sayahlatifi, Sara Sheikhi, Zahra Zaiemyekeh, and Jie Zheng

dear collegues

   I have been attracted recently by a theory from Shrimali and Lopez-Pamies which is based on experimental evidence obtained from Suo's group in Harvard in 2012 in a (limited, but significant) set of experiments on rubber.   The theory assumes that the stretch to nucleating a crack is constant and independent on stretch rate.  The theory is then built on that, to predict the increase of fracture energy with rate.

Dear Colleagues,

We are guest-editing a special issue of Applied Composite Materials (IF 2.3, an SCI-indexed journal of Springer, no publication fee) with a theme of Environmental Durability of Composite Materials and Structures. This Special Issue will provide a platform for researchers to share their latest progress in the study of the environmental durability of composite materials and structures. Topics of interests include, but are not limited to:

I would like to share our recent paper "Delayed detached eddy simulation-based aerothermoelastic analysis of deployable control fin in supersonic and hypersonic flows" published in Physics of Fluids. In this paper we study the stability and mechanics of a deployable control fin in supersonic and hypersonic flows accounting for fluid-structure interactions and joint freeplay nonlinearity. 

We investigate the fluid-elastic instability of a square tube bundle subject to two-phase cross-flow. A dimensional analysis is carried out, leading to a new criterion of instability. This criterion establishes a direct link with the instability thresholds in single-phase flows. In parallel to the dimensional analysis, experimental work is carried out to i) determine the instability thresholds in single-phase flows (new relation between the Scruton, Stokes and Reynolds number), ii) to test the validity of the two-phase flow instability criterion, derived from the dimensional analysis.

Our upcoming webinar is on September 27 at 2pm central.

Date/Time: September 27; 2-3pm CDT

Join via Zoom: https://us06web.zoom.us/j/84541274013?pwd=ZDhuM09BaUlVVlBuREhEV0sweGFlZ…

(Meeting ID: 845 4127 4013/Passcode: 799065)

Speaker: Kaushik Bhattacharya, California Institute of Technology

Discussant: Miguel Bessa, Brown University