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Xiaoyan Li's picture

Journal Club for January 2019: Nanoprecipitation strengthening in high entropy alloys

Nanoprecipitation strengthening in high entropy alloys

Xiaoyan Li, Jianguo Li

Center for Advanced Mechanics and Materials, Applied Mechanics Laboratory, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China

Introduction

Erkan Oterkus's picture

Mini-symposium Invitation at International Conference on Nonlinear Solid Mechanics in Rome, Italy

Dear Colleagues,

 

We would like to invite you to submit an abstract for a mini-symposium at International Conference on Nonlinear Solid Mechanics (ICoNSoM 2019) on “MS-18 Computational Fracture Mechanics” :

 

http://www.memocsevents.eu/iconsom2019/

 

mcgilldeju's picture

Postdoc and Faculty positions at Hunan University China

We have openings for two positions of post-doc fellow in our research group in the College of Civil Engineering at the Hunan University, China. These positions will focus on the high performance composites in civil engineering, and bio-inspired composites for flexible armor. For the post-doc positions, in addition to a strong understanding of solid mechanics and materials, experience in FE modelling using LS-DYNA is highly desirable.  For the faculty positions, the candidate should have strong research background in high performance construction materials (i.e.

Arzhang's picture

Now Acceting Abstracts:

 

Mini-symposium on Current and Future Needs in Sub-microscale Vibration Analysis

Engineering Mechanics Institute Conference 2019
California Institute of Technology

Arzhang Alimoradi* and Marie Levine†

Shailendra's picture

Graduate Student and Post-doc Opportunities at UH

We have openings for a PhD candidate and a post-doc fellow in our research group in the Department of Mechanical Engineering at the University of Houston. These positions will focus on the theoretical and computational modeling of damage in advanced materials.

For the PhD position, a strong background in solid mechanics is required; a good background in computational mechanics is highly desirable. 

For the post-doc position, in addition to a strong understanding of solid mechanics and materials, experience in crystal plasticity modeling, coding is highly desirable. 

Multiple graduate research assistantship and wage positions are available in the Center for Energy Harvesting Materials and Systems (CEHMS) at VIrginia Tech

Multiple graduate research assistantship and wage positions are available in the Center for Energy Harvesting Materials and Systems (CEHMS) at VIrginia Tech. We expect the student(s) will participate in projects funded by NSF, ONR, DOE and industry, and work on the energy harvesting circuits, power management, and control. The Energy Harvesting and Mechatronics Research Lab and CEHMS directed by Prof Lei Zuo have active research on energy harvesting from vibration, motion, fluid, and heat, using electromagnetic, piezoelectric, and thermometric transducers, at mW to KW scale.

Yonggang Huang's picture

2018 Timoshenko Medal Acceptance Lecture: Academic Family, by Prof. Ares Rosakis

The 2018 Timoshenko Medal Acceptance Speech:  Academic Family, by Prof. Ares Rosakis of California Institute of Technology, was just published in Journal of Applied Mechanics.  The article is attached.

 

Stress update scheme in platicity

Hi everybody,

I am studying the plastic deformation of sheet metal. Recently, I study about stress update scheme in finite element analysis using return mapping method. For this problem, we can calculate the increment of stress components, Δσ for a given value of strain components Δε using elastic predictor - plastic correct scheme. Since Δε = Δεe +Δεp, first, we assume Δεp=0 and check the yield criterion. Then, we find Δεp to satisfy the yield criterion as well as the consistent condition.

However, I have a question as the follows

Tailoring porous media for controllable capillary flow

Liu, M., Suo, S., Wu, J., Gan, Y., Hanaor, D. A. H., & Chen, C. Q. Journal of Colloid and Interface Science, 2019, 539: 379-387. https://www.sciencedirect.com/science/article/pii/S0021979718315108#f0040

Hypothesis

Zhaohe Dai's picture

Interface-Governed Deformation of Nanobubbles and Nanotents Formed by Two-Dimensional Materials

In this paper, we experimentally characterize a simple and unified power law for the profiles of a variety of nanobubbles and nanotents formed by 2D materials such as graphene and MoS2 layers. https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.121.266101

Key image

ABSTRACT

Optimal-Feedback Accelerated Picard Iteration Method and a Fish-Scale Growing Method for Wide-Ranging and Multi-Revolution Perturbed Lambert's Problems

Wide-ranging and multiple-revolution perturbed Lambert’s problems are building blocks for practical missions such as development of cislunar space, interplanetary navigation, orbital rendezvous, etc. However, it is of a great challenge to solve these problems both accurately and efficiently, considering the long transfer time and the complexity of high-fidelity modeling of space environment. For that, a methodology combining Optimal-Feedback Accelerated Picard Iteration methods and Fish-Scale Growing Method is demonstrated.

PDF position in Elastomers @ York University, Toronto, Canada

Vacancy exists for high calibre one postdoctoral fellow to join the Innovative Design and Engineering Analysis Laboratory at York University, starting immediately.
The position’s primary area of research will focus on characterization and modelling of elastomers subject to high strain rates.

 

 

 

WaiChing Sun's picture

USNCCM Mini-symposium on Computational Geomechanics

Dear colleagues, 

On behalf of the co-organizers, I would like to draw to your attention to the mini-symposium #1401 on Computational Geomechanics in the upcoming 15th NS National Congress on Computational Mechanics, to be held at Austin Texas from July 28th to August 1st, 2019. The due date of abstract submission is January 15th, 2019. 

Further information can be found at http://15.usnccm.org/1401

The scope of the mini-symposium is listed below.

Thanks, 

Steve Sun

Columbia University

A review on modeling of electro-chemo-mechanics in lithium-ion batteries

Investigations on the fast capacity loss of Lithium-ion batteries (LIBs) have highlighted a rich field of mechanical phenomena occurring during charging/discharging cycles, to name only a few, large deformations coupled with nonlinear elasticity, plastification, fracture, anisotropy, structural instability, and phase separation phenomena. In the last decade, numerous experimental and theoretical studies have been conducted to investigate and model these phenomena.

PhD Positions @ the University of Wisconsin-Madison in Hybrid Composites

Two PhD positions are available starting Summer/Fall 2019 in the Manufacturing and Mechanics Lab (MaMeL) within the Civil and Environmental Engineering Department at the University of Wisconsin-Madison under the supervision of Professor Pavana Prabhakar. The research topic is in the area of Mechanics of Hybrid Composites, and will involve theoretical/computational multiscale and multiphysics modeling in combination with experimental manufacturing and characterization studies.

Does anyone know how to use umat written in C code with ABAQUS installed in Linux?

Since there are some weird problems occurred during the compiling with the application of VS and ABAQUS in Windows system, my supervisor advised me to use Linux system instead. The reason is that the system of the server of the institute is Linux and Linux helps a lot regarding coding. However, when I tried to run umat.o file in ABAQUS with the server, there was an error called "Problem during linking". I'm sure the server has installed ABAQUS and Intel Fortran.

Zhijian Wang's picture

A light-powered ultralight tensegrity robot with high deformability and load capacity

In our recent work, we construct a hybrid light-powered tensegrity robot composed of both hard and soft materials. The tensegrity robot shows great scalability, deployability, impact-mitigation capability, high load capacity, and can be precisely controlled to move on multiterrains. It is an example of combining interesting structures and interesting actuating materials in soft robotics.

The moving path of tensegrity robot in a maze

Markus J. Buehler's picture

MIT Short Course: Predictive Multiscale Materials Design: June 10-14, 2019

Computational methods including AI are revolutionizing the materials design world. Today, an engineer or scientist can simply enter the desired properties into a program and the system will manufacture a microstructure that matches the specifications.

Hamid.Akbarzadeh's picture

PhD Position at McGill University in Architected Multifunctional Materials

One PhD position is available for Fall 2019 in the Advanced Multifunctional and Multiphysics Metamaterials Lab (AM3L) in the Bioresource Engineering Department of McGill University. The research topic is on the area of Mechanics of Architected Multifunctional Materials. Theoretical and computational multiscale modelling along with experimental (3D printing and characterization) studies will be conducted for multiphysics analysis of architected cellular solids. The candidate will work under the supervision of Dr. Hamid Akbarzadeh at McGill University.

hgomez's picture

PhD position available at Purdue

Multiple PhD positions available at Purdue. The general topic of the project is computational modeling of delivery of injectable medicines.

I am looking for candidates who can join immediately.

Dr. Hector Gomez Associate Professor School of Mechanical EngineeringWeldon School of Biomedical Engineering Purdue University e-mail: hectorgomez@purdue.eduweb   : https://engineering.purdue.edu/gomez/

 

Fan Xu's picture

On the wrinkling and restabilization of highly stretched sheets

Wrinkles are commonly observed in uniaxially stretched rectangular sheets with clamped-clamped boundaries, and can disappear upon excess stretching. Here we explore this wrinkling and restabilization behavior both analytically and numerically. We find that Poisson’s ratio plays a crucial role in the wrinkling and restabilization behavior. Smaller Poisson’s ratio makes later onset of wrinkling, lower amplitude and earlier disappearance of wrinkles.

Ruobing Bai's picture

Review: fatigue of hydrogels

Here is our review article on fatigue of hydrogels. This is the first review of the subject. We review fatigue as any failure of material under prolonged static or cyclic loads. The paper starts with fundamentals, and covers a broad field, yet leaving a lot of interesting questions to be answered. The paper links the chemistry and mechanics of hydrogels.

The publisher now provides 50 days’ free access to the paper.

pastewka's picture

Multiple Doctoral Positions in Multiscale Modeling of Friction and Adhesion

Adhesion and friction involving fluids or viscous matter, such as encountered in adhesives or in lubrication, are processes that determine everyday life, from human interaction with the environment to the function and reliability of machinery.

Phd / PostDoc position Additive Manufacturing - Polymers

A postdoc or a PhD position are available immediately at the Laboratoire de Mecanique des Solides (Solid Mechanics) at https://www.polytechnique.edu/The project is focused on understanding the impact of UV polymerization on the constitutive behaviour of printed polymer composites. The position is part of an ongoing collaboration with a german academic partner.

hyunwoo's picture

Multifunctional “Hydrogel Skins” on Diverse Polymers with Arbitrary Shapes

In this paper, we introduce a new simple yet effective strategy to form "hydrogel skins" on polymer-based medical devices with arbitrary shapes. Hydrogel skins can convert any surface of polymer devices into robust, wet, soft, slippery, antifouling, and ionically conductive without affecting the original properties and geometries.

Abstract

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