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Stress intensity factor from Abaqus

 How we can calculate K1 value from J - integral result from abaqus?. K1 value directly from abaqus is reliable? Because its crack initiation criterion is Max tangential stress, Max energy release rate and KII= 0. Which criterion will give correct results? Its depends on problem we handle. Thats I know. But if no value is available for crack initiation criterion ( Also, I introduce crack initially.

Zhigang Suo's picture

Twitter is an open-access publication platform

Join us to create a web of mechanics and mechanicians on Twitter. Here are my reasons and how to get started.

liheng.cai's picture

Postdoc opening in 3D printing of soft biomaterials at UVA

The Cai Soft Biomatter Laboratory ( at the University of Virginia is seeking to fill a Postdoctoral Researcher position in 3D printing of soft biomaterials. The project consists of two core areas: (1) materials innovation and (2) technology development. The successful candidate will develop new soft materials as inks for 3D printing, and use customized 3D printing technologies to transform the materials to adaptive structures for photonic and biomedical applications.

Phd and Post-doc positions in nonlinear dynamics at Lodz University of Technology, Poland


We offer two positions in the field of nonlinear dynamics and statistics for PhD student and post-doc at Lodz University of Technology, Poland. Please see attached pdfs for details.



Noel ODowd's picture

Funded PhD position in Computational Mechanics

Physically-based modelling of bainitic and martensitic steels for flexible and sustainable power generation and distribution (PrOCCESS)

Position now closed. 

Bin Wang's picture

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Hierarchically structured diamond composite with exceptional toughness, Yue, et al., Zhou, Guo, Tian, Nature, 2020


Huajian Gao's picture

Nanyang Assistant Professor

The School of Mechanical & Aerospace Engineering (MAE), Nanyang Technological University is actively looking to recruit top-notch faculty members in all areas of Mechanical Engineering. Several different avenues, such as the Nanyang Assistant Professorship for attracting talented researchers with outstanding academic and research record, are available. 

Nanyang Assistant Professor (NAP)

Ruobing Bai's picture

Photomechanical coupling in photoactive nematic elastomers

Dear Colleagues,

Our paper on theory of photomechanical elastomers has been published in JMPS. We explored the interplay between mechanical stress, light-induced reaction, and large deformation in photoactive nematic elastomers. You can find 50 days' free access here:

Photomechanical coupling in photoactive nematic elastomers

Ruobing Bai, Kaushik Bhattacharya

miquel.aguirre's picture

Beam to surface contact dynamics using a corotational formulation and discrete SDF

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

Jinxiong Zhou's picture

Modeling SMA-enabled soft deployable structures for kirigami/origami reflectors

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.

Wenbin Yu's picture

Global Composites Experts Webinar Series

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 for more details.

Associate Professor in Sustainable Design & Manufacturing, Aarhus University, Denmark

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.

Teng Li's picture

EML Webinar by Prof. Xi-Qiao Feng on 26 August 2020: Dynamics of Collective Cells

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

Rika Carlsen's picture

Postdoc Position in Computational Biomechanics (Remote Work Option Available)

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.

Hector Fellow Academy's picture

Announcement for the Hector Research Career Development Award for Junior Scientists

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.

Zhigang Suo's picture

A tweet is a publication

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.

Teng Li's picture

USNC/TAM Webinar on Machine Learning in Mechanics, August 27, 1:00 - 4:20 pm (EDT)

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.

Bin Wang's picture

keep reading-11


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


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.

Remote Mechanics Teaching. How to do it well?

Choose a channel featured in the header of iMechanica: 

Many of us will be teaching remotely soon.  I wonder what is most effective when it comes to mechanics.

In our department we have been having meetings to help professors figure out what is the approach to the online teaching modality.  There have been lots of suggestions:

esis's picture

Discussion of fracture paper #26 - Cracks and anisotropic materials

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.


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