iMechanica

Please check our new article on beam to surface contact modeling, recently accepted in  Computer Methods in Applied Mechanics and Engineering: https://doi.org/10.1016/j.cma.2020.113275 . We have used a previously reported dynamic corotational formulation and added frictional contact terms, which provide a fully consistent formulation.

The synergic combination of smart soft composites with kirigami/origami principles leads to self-deployable systems. To date, the development of soft deployable structures has largely been an empirical process. Focusing on the recently developed shape memory alloy (SMA)-based soft deployable structures, this paper describes an analytical model and a finite element (FE) numerical scheme to investigate deformation and deployment performance of this system.

EASF homepage: https://sites.google.com/view/engapplysciforum/home?authuser=0

Time: Every Sunday

London: 3:00-4:30 pm

Beijing: 10:00-11:30 pm

Composites Design and Manufacturing HUB (cdmHUB) invites you to attend the Global Composites Experts Webinar series. The goal of the series is to accumulate the vast knowledge of composites that has been developed over the past 50 years and to make it available to the global composites community. The inaugural lecture entitled Digital Disruption of Composites Manufacturing and Design will be given by Prof. Anoush Poursartip on September 3rd 11am-12pm EDT. Please visit https://lnkd.in/g9mkRjk for more details.

The Department of Engineering (ENG) at Aarhus University is looking for an innovative and visionary Associate Professor in the Section of Mechanical Engineering. Aarhus University is a top-100 university and has made ambitious strategic investments to place ENG in direct competition with the global engineering elite. Therefore, the department is focusing on advancing its research and teaching capabilities in the area of sustainable design & manufacturing.

EML Webinar on 26 August 2020 will be given by Professor Xi-Qiao Feng, Tsinghua University via Zoom meeting. Discussion leader: Professor Wei Yang, Zhejiang University

Title: Dynamics of Collective Cells

We currently have two postdoctoral research positions available in the Injury Biomechanics Laboratory at Robert Morris University in Pittsburgh, PA starting Fall 2020.  These positions involve the development of high-fidelity finite element head models and the design of computational studies to advance our understanding of traumatic brain injury (TBI).  The first position is focused on blast-induced TBI, and the second position is focused on pediatric TBI.

Apply now for the Hector Research Career Development (RCD) Award! With the Hector RCD Award, the Hector Fellow Academy supports the research careers of promising research group leaders. The Award gives you the unique opportunity to benefit from research funding for an outstanding research project. In addition, you will become part of a network of top scientists including the laureates of the Hector Science Award. The Hector Fellow Academy is committed to top interdisciplinary research, innovative projects, dialogue between science and society and the promotion of young researchers.

I ask each member in my group to set up a Twitter account using his or her real name. Here are my reasons.

iMechanica and Twitter are two networks. A dual user is an interlink between the two networks.

The USNC/TAM will be hosting on August 27 a webinar on Machine Learning in Mechanics. The event will be recorded, and the videos will be posted on the USNC/TAM site afterward. The attached flyer includes the Zoom link to register.

Hierarchically enhanced impact resistance of bioinspired composites, Gu, Takaffoli, Buehler, Advanced Materials, 2017

Novelty/impact/significance:

A methodology combining simulation, additive manufacturing of biomimetic structures, and mechanical testing is developed, and the function of structural hierarchy is explicated. The findings provide insightful guidance for designing future protective materials and devices.

All materials are anisotropic, that's a fact. Like the fact that all materials have a nonlinear response. This we can't deny. Still enormous progress has been made by assuming both isotropy and linear elasticity. The success, as we all know, is due to the fact that many construction materials are very close to being both isotropic and linear. By definition materials may be claimed to be isotropic and linear, provided that the deviations are held within specified limits. Very often or almost always in structural design nearly perfect linearity is expected.

EML Webinar on 19 August 2020 will be given by Professor Markus Buehler, MIT via Zoom meeting. Discussion leader: Professor Grace Gu, UC Berkeley

Title: The mechanics of biomateriomics

Time: 7 am California, 10 am Boston, 3 pm London, 10 pm Beijing on 19 August 2020

Dear colleagues, I hope this note finds you well despite the significant challenges that 2020 has brought. I am seeking to hire two post-docs for a new multidisciplinary project in my group titled "Distributed intelligence in kirigami-inspired flexible architectures". In this project we aim to implement ideas such as logic, information processing, and autonomy in materials. This work will draw on a number of disciplines, including information theory, soft robotics, kirigami/origami and geometric design, 3D printing of stimuli-responsive materials, morphological computing, etc.

We propose a new layered configuration of isotropic tubes that twists upon inflation, based on the concept of geometric incompatibilities. For more details click "Read more" below. The full paper can be found at: https://doi.org/10.1115/1.4047980.

Hello Dear All,

    Thanks to Extreme Mechanics Letter, a new discusion of localized plastic deformation was published there. Three outlines of our work are:

      1. A new dislocation based consitutive model is built. It has a concise mathematical struture.

      2. Heat generated by plastic energy can be calculated by a mechanical version of Joule's law.

      3. Shear band and neck locations can be predicted by the mathematical model.

We calculate bending moduli along the principal directions for forty-four select atomic monolayers using ab initio density functional theory (DFT). Specifically, considering representative materials from each of Groups IV, III–V, V monolayers, Group IV monochalcogenides, transition metal trichalcogenides, transition metal dichalcogenides and Group III monochalcogenides, we utilize the recently developed Cyclic DFT method to calculate the bending moduli in the practically relevant but previously intractable low-curvature limit.

Structural orientation and anisotropy in biological materials: Functional designs and mechanics, Liu, Zhang, Ritchie, Advanced Functional Materials, 2020

Novelty/impact/significance:

In the past two decades, acoustic metamaterials have garnered much attention owing to their unique functional characteristics, which are difficult to find in naturally available materials. The acoustic metamaterials have demonstrated excellent acoustical characteristics that paved a new pathway for researchers to develop effective solutions for a wide variety of multifunctional applications, such as low-frequency sound attenuation, sound wave manipulation, energy harvesting, acoustic focusing, acoustic cloaking, biomedical acoustics, and topological acoustics.

EML Webinar on 12 August 2020 will be given by Professor Ellen Kuhl, Standard University via Zoom meeting. Discussion leader: Professor Pradeep Sharma, University of Houston.

Title: Data-driven modeling of COVID-19—Lessons learned