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Emilio Martínez Pañeda's picture

PhD position in Computational Fracture Mechanics of porous media at Imperial College London (UK applicants only)

Applications are invited for a PhD scholarship at Imperial College London. The work will be conducted in close collaboration with the University of Cambridge, with the student being supervised by Dr ​​​​Emilio Martínez Pañeda (main supervisor), Prof Catherine O'Sullivan (Imperial College) and Prof Norman Fleck FRS FREng (University of Cambridge). 

The project aims at developing new theoretical and computational micromechanics-based models for rocks and porous media. More details of the project are given here:

Shuman_Xia's picture

Abstract Deadline Extended: SEM 2020 Call for Papers

Dear Colleagues,

 

The SEM 2020 annual conference abstract deadline has been extended to Monday, October 28, 2019. Please see the Call for Abstracts below and consider submitting an abstract.

 

Yihui Zhang's picture

ASME Robert Henry Thurston Lecture at IMECE 2019

Professor Yonggang Huang from Northwestern University will deliver the ASME Robert Henry Thurston Lecture during the IMECE 2019 at Salt Lake City, Utah. The time and location of this lecture is as follows:

TIME: 11:00 am – 12:00 pm, November 13 (Wednesday)

LOCATION: Room 151 G, 1st Level, Calvin L. Rampton Salt Palace Convention Center

More information about this lecture can be found in the attached flyer.

Daniel S. Balint's picture

Research Associate (PostDoc) in Dislocation Mechanics Modelling for Nuclear Materials, at Imperial College London

I have a post-doc position for up to 28 months at Imperial College London, working on dislocation mechanics modelling for problems in nuclear materials, advert snippet below, full advert and application from the link below. Closing date 30th October 2019, starting as soon as possible, at least within the next 6 months.

Timothy Truster's picture

Two open PhD positions in multi-physics process and performance modeling of alloys at the University of Tennessee

We have two open PhD position starting in the Fall semester 2020 at the Computational Laboratory for the Mechanics of Interfaces at the University of Tennessee - Knoxville (http://clmi.utk.edu). First research topic centers upon the modeling of texture evolution during processing (e.g. cogging and rolling) of titanium alloys using crystal plasticity and Fast Fourier Transform methods to couple the mesoscale and specimen scale.

Mike Ciavarella's picture

In the 100 000 top scientists there is decline of USA, and a jump of China and India

Not everyone has noticed, also from our previous studies including a letter to Nature,  that in the list of 100 000 most cited scientists by Ioannides et al. recently published in PLOS Biology, comparing the career database (1996-2017) with that of 2017, composed of around 2% of Italians, all the states we analysed except for Italy and China and India have suffered a decline in the number of researchers present in the 2017 data set compared to even substantial career data (Japan –20% nationally ).

Mike Ciavarella's picture

Analytical Models for Fatigue Life Prediction of Metals in the Stress-Life Approach -- phd thesis by Pietro D’Antuono

dear collegues

  I'd be very grateful if you could have a look, if not a deep reading, at the phd thesis of my last student, playing on classical results on uniaxial fatigue, but with a view of simple, unified perspective on constant and varying amplitude fatigue.  We made large use of e-fatigue.com web site and the data in there.
 Thanks in advance for any remark.  The final thesis will be submitted in few weeks time.

PhD openings in solid/structural mechanics at Stony Brook University

I would like to advertise several openings for Ph.D. students in my recently-established research group, the Dynamic Structures Laboratory at Stony Brook University. The intended starting semester is Fall 2020.

Bikram's picture

Society of Experimental Mechanics 2020 (Orlando, FL) (June 8-11)

Dear Colleagues,

We invite you to submit an abstract to the 2020 Society for Experimental Mechanics (SEM) Annual Meeting in one of the many sessions in the Fatigue and Fracture Track. See below for further information on these sessions, and please forward this to others who may be interested.

The conference will be held in Orlando, Florida from June 8-11, 2020. Abstracts are due October 21, 2019 via the SEM website. General submissions are always welcome. When submitting your abstract for a specific session please enter the name of the session on the abstract submission form. Also please email a copy of your abstract to the session organizer(s) directly.
Conference Website: https://sem.org/annual
The abstract submission link is: https://sem.org/annualauthor (click “Upload/Edit Submission” button)
Although SEM encourages the submission of full conference papers or extended abstracts, oral-only presentations are welcome in the following sessions.

We are looking forward to seeing you at SEM in 2020!

SEM Fracture and Fatigue Session Organizers:
Shuman Xia Allison Beese Ryan Berke Garrett Pataky
Jay Carroll Kavan Hazeli Siva Nadimpalli Scott Grutzik
Onome Scott-Emaukpor Shelby Hutchens Bala Sundaram
Phillip Noell Will LePage Bikramjit Mukherjee

1. In Situ Techniques and Microscale Effects on Mechanical Behaviors
Organizer(s): Jay Carroll
Email: jcarrol@sandia.gov
2. Fatigue and Fracture under Extreme Environments (In collaboration with Thermomechanical TD and Time Dependent Materials TD)
Organizer(s): Ryan Berke, Kavan Hazeli
Email: ryan.berke@usu.edu, kavan.hazeli@uah.edu
3. Mechanics of Energy Materials
Organizer(s): Shuman Xia, Siva Nadimpalli, Will LePage
Email: shuman.xia@me.gatech.edu, nadimpal@njit.edu, wlepage@umich.edu
4. Vibration Effects and High Cycle Fatigue in Fracture and Fatigue
Organizer(s): Ryan Berke, Onome Scott-Emuakpor
Email: ryan.berke@usu.edu, onome.scott-emuakpor.1@us.af.mil
5. Fracture and Fatigue in Additive Manufacturing (In collaborations with Additive Manufacturing Track)
Organizer(s): Garrett Pataky, Allison Beese
Email: gpataky@clemson.edu, amb961@psu.edu
6. Interfacial and Mixed-Mode Fracture
Organizer(s): Scott Grutzik, Bala Sundaram
Email: sjgrutz@sandia.gov, meenakshb@corning.com
7. Integration of Models and Experiments
Organizer(s): Scott Grutzik
Email: sjgrutz@sandia.gov
8. Fracture and Fatigue in Brittle Materials
Organizer(s): Bala Sundaram, Scott Grutzik
Email: meenakshb@corning.com, sjgrutz@sandia.gov
9. Fracture and Fatigue in Elastomers and Gels (In collaboration with Time Dependent Materials TD)
Organizer(s): Shelby Hutchens
Email: hutchs@illinois.edu
10. Damage Initiation Mechanisms and the Influence of Incipient Damage
Organizer(s): Kavan Hazeli, Phillip Noell
Email: kavan.hazeli@uah.edu, pnoell@sandia.gov
11. Advances in Mechanics of Deformation, Plasticity and Failure
Organizer(s): Will LePage, Jay Carroll
Email: wlepage@umich.edu, jcarrol@sandia.gov

1. In Situ Techniques and Microscale Effects on Mechanical Behaviors
Organizer(s): Jay Carroll
Email: jcarrol@sandia.gov
In situ techniques provide a wealth of information for the understanding of fatigue and fracture mechanisms and behavior. Techniques including in situ digital image correlation (DIC) with optical or scanning electron microscope imaging, in situ neutron diffraction, in situ synchrotron imaging, and tomography can allow for the observation and identification of failure mechanisms across a wide range of length and time scales. The usefulness of in situ experimental data has been recognized and is becoming the standard for validation of models and qualification of components.
Deformation and fracture involve processes at the atomic and molecular length scales. However, deformation and fracture have been approached historically on length scales that tend to homogenize the material, due to a lack of small-scale interrogation tools. Over the past decade, the application of modern tools for the fabrication and interrogation of materials and structures at the micron size scale and below is revolutionizing mechanics. It is now possible to measure the mechanical behavior of structures with dimensions well below one micron, where surface effects and microstructure become critical. In larger scale structures, deformations can be captured at nanometer size scales, allowing for the measurement of strains in separate grains, or in separate phases of a material, as a crack progresses or damage accumulates.
This symposium will bring together researchers using in situ and/or small scale experimental techniques to address common mechanics issues. In addition to fatigue and fracture, experiments on other topics, such as plasticity, creep, dynamic effects, and engineering development, are welcome. Novel experimental methods, studies linking size scales, and studies linking experiments to theory or simulation are particularly sought.

2. Fatigue and Fracture under Extreme Environments (In collaboration with Thermomechanical TD and Time Dependent Materials TD)
Organizer(s): Ryan Berke, Kavan Hazeli
Email: ryan.berke@usu.edu, hazeli@jhu.edu
This session is intended to provide a forum for researchers from the academic, industrial and government sectors to share, discuss, and debate the latest improvements on the science, technology, and application fronts in fatigue and fracture under extreme environments. Of particular interest is to develop an understanding of material behavior under extreme conditions that include but not limited to cyclic loading, photonic and phononic interactions, elevated temperatures, highly corrosive environments, high radiation fluxes or a multitude of above factors. The goal is to investigate the constitutive response and roles of evolving intrinsic field variables to provide kinematic, kinetic and dynamic descriptions of the way cracks nucleate and propagate through solids.
Abstracts are solicited in (but not limited to) the following topics:
• Fatigue strength and resistance under extreme environments
• Quantitative and/or qualitative relationships between micro-macro environments and fatigue properties along with life prediction under extreme environments
• Thermal and thermomechanical fatigue
• Photonic and phononic material response
• Dynamic fatigue
• High cycle fatigue
• Creep fatigue and/or creep rupture
• Microstructure evolution and stability

3. Mechanics of Energy Materials
Organizer(s): Shuman Xia, Siva Nadimpalli, Will LePage
Email: shuman.xia@me.gatech.edu, nadimpal@njit.edu, wlepage@umich.edu
Energy materials hold one of the keys to fundamental advances in generation, storage, conversion, absorption, and harvesting of energy for a broad range of automotive, industrial and defense applications. The successful development and deployment of these materials relies critically on a fundamental understanding of strongly coupled multiphysical phenomena, including mechanical deformation, heat and mass transfer, phase transformation, electromagnetism, and chemistry. The objective of this symposium is to provide a forum for the presentation and discussion of experimental and integrated computational/experimental investigations in this highly interdisciplinary field. The symposium will cover the latest research advances from the mechanics and materials prospective and will seek to identify new research challenges by exploring interfaces with other disciplines. Suggested topics include but are not limited to: in-situ and ex-situ experimental characterization of coupled phenomena between mechanical and other physical processes, microstructure/property relationships, phase transformation in energy materials, multiscale characterizations, and integrative experimental and modeling approaches.

4. Vibration Effects and High Cycle Fatigue in Fracture and Fatigue
Organizer(s): Ryan Berke, Onome Scott-Emuakpor
Email: ryan.berke@usu.edu, onome.scott-emuakpor.1@us.af.mil
High Cycle Fatigue (HCF) is important for many engineering applications, such as gas turbine engines and other rotating machinery. In order to ensure the performance, safety, and reliability of such assemblies, materials must be characterized to withstand HCF under relevant operating conditions. However, HCF experiments can be costly and time-consuming -- a single axial fatigue test operating at 40 Hz requires almost 70 hours to accumulate enough cycles (on the order of 10^7) to generate a single point on an S-N Curve. Compared to axial test methods, vibration-based methods can not only better reproduce the operating environments of high cycle machinery, but can be conducted at much higher frequencies and thus accumulate HCF data more quickly. In this symposium, abstracts are sought which explore the use of vibration-based methods in experimental mechanics, and/or new advances in HCF characterization. Topics may include, but are not limited to, use of computational approaches, statistical models, experimental methods, and/or error quantification.

5. Fracture and Fatigue in Additive Manufacturing (In collaborations with Additive Manufacturing Track)
Organizer(s): Garrett Pataky, Allison Beese
Email: gpataky@clemson.edu, amb961@psu.edu
Additive manufacturing (AM) of metals, polymers, and ceramics enables the layer-by-layer fabrication of complex geometries that cannot be fabricated through traditional techniques, as well as the fabrication of custom components, and the repair of existing parts. However, the processing of components by AM varies drastically from traditional processing techniques. For example, AM typically involves thermal cycles not seen in conventional processing, resulting in microstructures and properties that widely vary from traditionally-manufactured counterparts. Therefore, in order to open the application space for, and wider adoption of AM, an understanding of the processing, structure, and mechanical property relationships is required. In this symposium, we seek experimental and computational studies that link processing to structure, and/or structure to mechanical properties in materials made by AM, including, but not limited to, metals, polymers, and ceramics.

6. Interfacial and Mixed-Mode Fracture
Organizer(s): Scott Grutzik, Bala Sundaram
Email: sjgrutz@sandia.gov, meenakshb@corning.com
Many engineering designs involve interfaces between different materials. These interfaces can act as flaws resulting in failure that initiates at or propagates along them. Analysis of such interfacial failures are extremely complex. Depending on the relative toughness between the bonded materials, interfacial toughness and its orientation, the crack may be restricted to or can kink out of the interface. Under certain conditions, the crack may even branch into multiple cracks at the interface. Measurement of interfacial toughness for wide range of mode-mixities is essential as a constrained crack often propagates along an interface under varying mode-mixity. This makes the characterization and analysis of interfaces significantly more challenging than bulk materials, which are often characterized by their mode-I (opening mode) toughness. This session will focus on interfacial fracture phenomena such as mode-mixity, cohesive/adhesive failure, traction separation laws, crack kinking, unique specimen geometries, mixed-mode fracture, crack branching at an interface, interfacial toughness along with interfacial fatigue for both quasi-static and dynamic loading conditions.

7. Integration of Models and Experiments
Organizer(s): Scott Grutzik
Email: sjgrutz@sandia.gov
Models and experiments have much to learn from one another. The integration of these two disciplines at all scales, promises to accelerate our understanding of fracture and fatigue, and related phenomena. This will be important for designing future materials with enhanced fracture resistance and for designing structures that fully exploit these properties. To foster further interaction of experiments and modeling, this session will provide a venue for work emphasizing the integrating and validating models with experiments. The phenomena discussed will include mechanical behavior of materials such as fatigue, fracture, plasticity, creep, etc. Expected topics will include novel combined modeling/experimental techniques, different approaches to model validation, and work in which models and experiments inform one another. This session will bring together researchers from a number of fields in including crystal plasticity; fatigue crack growth; fracture and ductile failure; and effects of combined mechanical loading and extreme environments such as corrosion, elevated temperatures, hydrogen embrittlement, and radiation effects. Presentations with a wide range of backgrounds from basic research to engineering development are welcome.

8. Fracture and Fatigue in Brittle Materials
Organizer(s): Bala Sundaram, Scott Grutzik
Email: meenakshb@corning.com, sjgrutz@sandia.gov
Brittle materials such as glass and ceramics with their high stiffness, high hardness and low failure strains pose significant challenges for their fracture study. Although these attributes have led to them being used widely for various engineering applications, unlike other materials, their strength is not an intrinsic property but rather dependent on the flaw distribution. Glass is very much susceptible to static fatigue - the duration of the application of the loading influences the strength of glass - especially in high humidity environment. Ceramics on other hand exhibit cyclic fatigue. Then there exists glass-ceramics, which is a material system with both amorphous and crystalline phase. With rapid advancement in computational capabilities, some of these complex behaviors can be simulated numerically. Other brittle glassy materials, apart from inorganic glasses and ceramics, that show similar characteristics are also welcome in this session. This session aims to connect several interesting topics such as stress corrosion, static fatigue, slow crack growth, indentation and scratch, fast fracture, crack branching, characterization techniques and specialized test methods, cyclic fatigue, transformation toughening, R-curves etc. - be it computational or experiment based.

9. Fracture and Fatigue in Elastomers and Gels (In collaboration with Time Dependent Materials TD)
Organizer(s): Shelby Hutchens, Bikramjit Mukherjee
Email: hutchs@illinois.edu, bmukherjee1@dow.com
In contrast to high-load structural applications, soft materials find use when engineering designs require large deformations and high compliance. Though these properties enable protective, conformable, or biocompatible designs, they pose challenges in failure characterization. Material fragility may prevent the use of standard fracture geometries and testing procedures. Measurement of the large deformations requires advanced strain field characterization techniques (e.g., particle tracking, large deformation DIC, light scattering). Difficulties arise when attempting to apply linear elastic fracture mechanics framework to characterize fracture of soft materials and structures. Besides, instabilities associated with interfacial (e.g. viscous/elastic finger formation) and bulk fracture (e.g., cavitation or fracture) of soft materials have become a rich area of experimental and theoretical research providing unique avenues to engineer bio-mimetic properties. In addition, many soft materials, including elastomers, gels, foams, and biological tissues, possess properties that are highly sensitive to environmental conditions (e.g., temperature, humidity). Somewhat uniquely, the solution-like nature of many soft materials enable the use of molecular sensors (e.g., mechano-chemistry) to probe the nature of micro structural contributions to failure processes. Abstracts are solicited on the above or related topics relevant to the characterization of soft fracture.

10. Damage Initiation Mechanisms and the Influence of Incipient Damage
Organizer(s): Kavan Hazeli, Phillip Noell
Email: kavan.hazeli@uah.edu, pnoell@sandia.gov
This session is intended to provide a forum for researchers from the academic, industrial and government sectors to discuss the latest understanding about damage initiation mechanisms under a wide range of environments including plasticity, fatigue, creep, thermomechanical loading, impact, corrosive environments, and radiation. The particular emphasis is on understanding how damage initiates at the micro and nano scales and the effects of this incipient damage on the mechanical properties of the material leading to fracture.

11. Advances in Mechanics of Deformation, Plasticity and Failure
Organizer(s): Will LePage, Jay Carroll
Email: wlepage@umich.edu, jcarrol@sandia.gov
This session welcomes submissions from a broad field encompassing many phenomena beyond the scopes of the above sessions, such as plasticity, non-linear elasticity, time dependent deformation, novel evaluation techniques, etc. The goal is to allow attendees to gain exposure to a wide range of different phenomena in mechanics of deformation, plasticity and failure.

noyco's picture

Drastic swelling-induced softening of polymer networks with non-covalent cross-linking bonds

Our recent work introduces a microscopically motivated model for the swelling response of polymer networks with non-covalent cross-linking bonds.

Fred Sansoz's picture

PhD Position in Nanocrystalline Alloys at the University of Vermont (USA)

A new PhD position is available immediately in my group in the area of computational atomistic modeling of grain-boundary segregation and plasticity mechanisms in nanocrystalline alloys. Full description available in the attached file. 

Marc Geers's picture

Multiple faculty positions in Mechanics and Materials at TU/e Eindhoven

There are several openings for faculty positions in the field of Mechanics and Materials in our Department of Mechanical Engineering of the Eindhoven University of Technology in The Netherlands. The department is seeking for outstanding faculty members at all levels and in particular the fields of Function integration in material systems and Development, optimization and behaviour of new advanced materials. At present, talented people with an experimental profile are strongly encouraged to apply.

PhD position in computational biomechanics at University of Glasgow

I am looking for motivated students to join my research group and work towards their PhD in the area of computational biomechanics.

Description

Almost 30% of all deaths globally are related to cardiovascular diseases, and most of these are related to changes in the stiffness of tissues making up the system. There is an urgent need for new computational tools that can help detect, understand, and treat these diseases. There are four specific projects available under his broad topic:

Rudraprasad Bhattacharyya's picture

Why getting trouble with Abaqus UMAT subroutine when using interaction features like contact or tie?

I am implementing a constitutive relation in UMAT subroutine using the commercial software Abaqus. First, I tested the UMAT subroutine with 'one element model' first. Then I tested with comparatively bigger geometry. It worked fine. Now when I am trying to do a models involving contact, i.e. use of the 'Interaction module'. I am getting error of over-constraint warning for 'Split Tension test of concrete cylinder'. The same input file (except the material definition) is running on Abaqus perfectly with Mohr-Coulomb criteria. I can see a reasonable stress and strain contour.

Dr. Hanaor - Department of Ceramic Materials - TU Berlin's picture

Contact stiffness of rough surfaces

Contact stiffness of multiscale surfaces by truncation analysis

 

In this concise piece of work, an effective method is shown to gain new understandings into the role of surface structure in the field of contact mechanics. In particular, normal contact stiffness is correlated to parameters of surfaces' fractal dimension and amplitude. 

TAND0011's picture

FEA Engineering Opening at CAE Consultancy

FEA Simulation Engineer We are looking for creative, talented and experienced Finite Element Analysis (FEA) and test data analysis FEA Engineer to Join our FEA Consulting Team.In this Finite Element consulting position, you will be responsible for performing FEA analysis

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