research

The problem of the detachment of a sufficiently large flat indenter from a plane adhesive viscoelastic strip of thickness “b” is studied. For any given retraction speed, three different detachment regimes are found: (i) for very small “b” the detachment stress is constant and equal to the theoretical strength of the interface, (ii) for intermediate values of “b” the detachment stress decays approximately as b−1/2, (iii) for thick layers a constant detachment stress is obtained corresponding to case the punch is detaching from a halfplane.

This study presents a computational approach to obtain nonlinearly elastic constitutive relations of strip/ribbon-like structures modeled as a special Cosserat rod. Starting with the description of strips as a general Cosserat plate, the strip is first subjected to a strain field which is uniform along its length. The Helical Cauchy-Born rule is used to impose this uniform strain field which deforms the strip into a six-parameter family of helical configurations-the six parameters here correspond to the six strain measures of rod theory.

Dear Colleagues of the composite community,

Our first Special Issue are already published on Applied Composite Materials as Volume 30, issue 4:

Applied Composite Materials | Volume 30, issue 4 (springer.com)

Full article list are provided here:

1. Special Issue: Advanced Modeling and Design for Composite Materials and Structures

EML Webinar (Young Researchers Forum) on 17 October 2023 will be given by Emma Lejeune at Boston University via Zoom meeting

Title: Data Driven Modeling of Mechanical Systems

Discussion leader: Adrian Buganza Tepole, Purdue University

Time: 10 am Boston, 3 pm London, 4 pm Paris, 10 pm Beijing on Tuesday, 17 October 2023

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