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A tutorial on Bayesian inference in mechanics

http://hdl.handle.net/10993/37698

Hussein Rappel's new paper is out.

— STEPHANE BORDASlegato-team.eu Try out MuLib https://mulib.azurewebsites.net/ 

35 PhD positions open - apply online

Cohesive element modelling problem in ABAQUS

Dear All,

I am modelling a 3 point bend specimen with Cohesive elements tied to the upper and lower halves of the specimen in 2d.

The problem is that the CZ elements perform properly only for a combination of element sizes, i.e. a combination of element size of structure and CZ elements, for instance in my case the structure/specimen element size is 0.2mm and CZ is 0.001 or 0.002. For any other combination the adjacent elements bend as shown in the attached image.

I will be glad if someone could explain this behaviour and the solution.

KevinGE's picture

Fast-Response, Stiffness-Tunable Soft Actuator by Hybrid Multimaterial 3D Printing

ttps://onlinelibrary.wiley.com/doi/full/10.1002/adfm.201806698

Fast‐Response, Stiffness‐Tunable Soft Actuator by Hybrid Multimaterial 3D Printing

Yuan-Fang Zhang, Ningbin Zhang, Hardik Hingorani, Ningyuan Ding, Dong Wang, Chao Yuan, Biao Zhang, Guoying Gu,* and Qi Ge*

Emilio Martínez Pañeda's picture

Steady-state fracture toughness of elastic-plastic solids: Isotropic versus kinematic hardening

I hope some of you may find this work interesting. We show that kinematic hardening effects play a significant role in monotonic/static fracture.

Steady-state fracture toughness of elastic-plastic solids: Isotropic versus kinematic hardening

K.J.Juul, E.Martínez-Pañeda, K.L.Nielsen, C.F.Niordson

Engineering Fracture Mechanics, 207, pp. 254-268 (2019)

Volume 207, 15 February 2019, Pages 254-268

MehdiAmiri's picture

Ph.D. Positions Available in Mechanical Engineering at George Mason University

Ph.D. positions are available in Mechanical Engineering Department at George Mason University. Candidates should have strong background in computational solid mechanics and materials engineering and be willing to perform experimental work when needed. Experience in data analytics and machine learning is highly advantageous. Interested candidate may send CV and interest letter to mamirida@gmu.edu.

K.Kanistras's picture

Fully Funded Ph.D. Position

January 18th 2018

 

peppezurlo's picture

Nonlinear elasticity of incompatible surface growth

In this manuscript with Lev Truskinovsky, we developed a new nonlinear theory of large-strain incompatible surface growth. Surface growth is a crucial component of many natural and artificial processes from cell proliferation to additive manufacturing. In elastic systems, surface growth is usually accompanied by the development of geometrical incompatibility leading to residual stresses and triggering various instabilities. Here we developed a nonlinear theory of incompatible surface growth which quantitatively linkes deposition protocols with post-growth states of stress.

Need Help regarding UMAT subrouitne

It's been  2 weeks, I strated to use abaqus and user subrouitnes. To understand the how user subroutine work I thought to run some UMAT which I got it from  http://imechanica.org/files/Writing%20User%20Subroutines%20with%20ABAQUS.pdf  (page no- L6.73) to analysis a 3d steel plate with the material property which is given below.

Harold S. Park's picture

Designing Highly Stretchable Kirigami Using Machine Learning

https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.121.255304

Accelerated Search and Design of Stretchable Graphene Kirigami Using Machine Learning

P.Z. Hanakata, E.D. Cubuk, D.K. Campbell and H.S. Park

Damage Mechanics Challenge Workshop

Damage Mechanic Challenge

The purpose of the conference is to gather computational scientist and experimentalist to define and launch a numerical challenge to predict damage evolution and signatures of failure in brittle material.  At the workshop, participants are invited to

(1) present their computational approach for numerical simulation of damage; 

Zhaohe Dai's picture

Strain Engineering of 2D Materials: Issues and Opportunities at the Interface

In this progress report, we reviewed recent advances in strategies for applying mechanical strain into 2D materials and recent state‐of‐the‐art characterizations of interface mechanics for 2D material–substrate systems.

Kai Yu's picture

Call for abstracts: Topic on 3D Printed Soft Materials in ASME IMECE 2019

Dear colleagues:

We would like to invite you to submit an abstract to the topic on 3D Printed Soft Materials at the ASME 2019 IMECE to be held from November 8 to November 14, 2019 at Salt Lake City, Utah.

Teng zhang's picture

Call for abstracts: Symposium on Functional Soft Composites - Design, Mechanics, and Manufacturing in ASME IMECE 2019

Dear friends and colleagues,

We invite you to submit an abstract to Symposium on Functional Soft Composites - Design, Mechanics, and Manufacturing. This symposium is part of 2019 ASME International Mechanical Engineering Congress & Exposition, November 8-14, 2019 Salt Lake City, Utah, US.  The symposium is sponsered by the Compoiste Material technical committee in the Applied Mechanics Division of ASME. 

Zhengwei Li's picture

A biohybrid valveless pump-bot powered by engineered skeletal muscle

Pumps are critical life-sustaining components for all animals. At the earliest stages of life, the tubular embryonic heart works as a valveless pump capable of generating unidirectional blood flow. Inspired by this elementary pump, we developed the first example of a biohybrid valveless pump-bot powered by engineered skeletal muscle. Our pump-bot consists of a soft hydrogel tube connected at both ends to a stiffer polydimethylsiloxane (PDMS) scaffold, creating an impedance mismatch.

a12najafi's picture

Application Engineering Position at ANSYS, Ann Arbor, MI/Evasnton, IL/ Cannonsburg, PA

We are pre-screening candidates for an opening for an application engineer at ANSYS Inc. prefereably in Ann Arbor, MI.

The job entails providing advanced technical guidance on various aspects of computational Structural Mechanics with focus on Structural Dynamics to clients in industry and academia.

Postdoc position in crystal plasticity model of additive manufacturing at the National University of Singapore

Dr. Wentao Yan's group at the Department of Mechanical Engineering, National University of Singapore, focuses on metal additive manufacturing: computational modeling, experimental validation and data analytics.

jenda_z's picture

Ph.D. student position in mechanics of mechanical metamaterials

Professor Milan Jirásek at Faculty of Civil Engineering, Czech Technical University in Prague, is searching for a motivated Ph.D. student, who will work on our new ambitious project on non-periodic mechanical metamaterials. Candidates should be interested in and have some previous experience with mathematical modeling and numerical simulation of the mechanical response of materials and structures.

Antonio Papangelo's picture

On unified crack propagation laws

The anomalous propagation of short cracks shows generally exponential fatigue crack growth but the dependence on stress range at high stress levels is not compatible with Paris’ law with exponent m=2. Indeed, some authors have shown that the standard uncracked SN curve is obtained mostly from short crack propagation, assuming that the crack size a increases with the number of cycles N as da/dN=H\Delta\sigma^h where h is close to the exponent of the Basquin’s power law SN curve.

Teng zhang's picture

Two Ph.D. positions are available immediately at University of Mississippi (Ole Miss)

Two Ph.D. positions are available immediately in the Department of Mechanical Engineering at University of Mississippi (Ole Miss). The positions can be started as early as Jan 23, 2019 if possible.  Successful candidates will participate in a vibrant interdisciplinary and collaborative research group in our Blast and Impact Dynamics Lab and Additive Manufacturing for Research and Education Cluster (AMREC) at Ole Miss, and be involved in projects pursuing research in the field of shockwave/high-strain rate impact simulations, material and constitutive modeling, and failure analysis.

Igor Berinskii's picture

Minisymposium “Mechanics of Architectured Materials” in St. Petersburg, Russia

Dear colleagues,

We would like to invite you to take part in the minisymposium “Mechanics of Architectured Materials” in XLVI International Conference “Advanced Problems in Mechanics”. The conference will take place in Saint- Petersburg, Russia,  24-29th of June 2019.

Yong Zhu's picture

ASME Materials Division calls nominations for Orr Early Carrer Award, Sia Nemat-Nasser Early Career Award, and Nadai Medal

ORR EARLY CAREER AWARD

The award recognizes young researcher within 7 years of terminal degree working in experimental, computational, or theoretical fatigue, fracture, or creep. For more information please see https://www.asme.org/about-asme/get-involved/honors-awards/unit-awards/orr-early-career-award.

OliverWeeger's picture

Research Assistant in Computational Mechanics at TU Darmstadt


The newly established group for Cyber-physical Simulation at the Department of Mechanical Engineering at TU Darmstadt in Germany is offering a position for a
Research Assistant in Computational Mechanics.
Potential research areas include finite element methods, isogeometric analysis, design optimization, multi-scale & multi-physics, data-driven methods and additive manufacturing applications.

Yaning Li's picture

Ph.D and Post-doc Positions Open

 

Ph.D and Postdoc positions now open (for Fall 2019) in Mechanics, Biomimetics, and 3D Printing Lab at the University of New Hampshire/Mechanical Engineering Department.

More information about the lab can be found at http://www.unh.edu/yaning-lab/

Please directly send CV to Prof. Yaning Li at: yaning.li@unh.edu  

Postdoctoral Fellowship in Computational Mechanics At Duke University

Professors Wilkins Aquino and John Dolbow at Duke University are soliciting applications for candidates interested in a postdoctoral fellowship in computational mechanics at Duke University.  Applicants are expected to have experience in the development of numerical methods for problems in mechanics.  Experience with nonlinear systems of equations, high-performance computing, C++, and/or meshless methods will be viewed favorably.  

 

mohsenzaeem's picture

A Review of Computational Modeling Techniques in Study and Design of Shape Memory Ceramics

Shape memory ceramics are a unique family of shape memory materials with a wide variety of applications, such as ultra-high energy dissipation and high-temperature actuation. Along with significant progress in the experimental study of zirconia-based shape memory ceramics in recent years, computational simulations have exhibited powerful capabilities in revealing nano/microstructure-dependent deformation and failure mechanisms in these materials.

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