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

Zoom Link: https://harvard.zoom.us/j/271079684 

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.

The COVID-19 pandemic created huge demand of relevant medical  and personal protective equipment (PPE) and put unprecedented pressure on the healthcare system within a very short span of time. Moreover, the supply chains system faced extreme disruptions as a result of the frequent and severe lockdowns across the globe. In this situation, additive manufacturing (AM) becomes a supplementary  manufacturing process to meet the explosive demands and ease the health disaster worldwide.

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.