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Hsiao-Wei Lee's picture

Modeling fatigue of pre-corroded metals with unified mechanics theory

The unified mechanics theory (UMT) was used to develop a model to predict the fatigue life of pre-corroded steel samples with BCC structure. Details of the experimental validation are also provided.

https://doi.org/10.1016/j.matdes.2022.111383

nwiersch's picture

Post-doc at the University of Tennessee in Vibration Isolation

A position as a Post-doc in the Innovative and Smart Infrastructure Group (ISIG) at the University of Tennessee working with Dr. Wierschem is available starting in Fall 2020. This position is available to US Citizens only. This post-doc will be involved in a research project on vibration isolation. The ideal candidate will have experience in structural dynamics with a PhD in Civil, Mechanical, or Aerospace Engineering or a related field. Interested candidates should email Dr. Wierschem (nwiersch at utk.edu) with a CV.

Postdoctoral vacancy (2 years) on high-frequency vibration techniques for non-destructive inspection of 3D printed metal parts

The use of 3D printed metal structures is taking a very fast ramp-up in industry. General Electric has demonstrated the possibility of printing titanium fuel injectors for their LEAP engine, EADS has printed a nacelle hinge bracket for the Airbus A320, Boeing is printing plastic inlet ducts for high-altitude aircrafts, hip implants and other prosthetics are exploiting the design freedom of additive manufacturing (AM),..

Postdoctoral vacancy (3 years) on high-frequency vibration techniques for non-destructive inspection of 3D printed metal parts

The use of 3D printed metal structures is taking a very fast ramp-up in industry. General Electric has demonstrated the possibility of printing titanium fuel injectors for their LEAP engine, EADS has printed a nacelle hinge bracket for the Airbus A320, Boeing is printing plastic inlet ducts for high-altitude aircrafts, hip implants and other prosthetics are exploiting the design freedom of additive manufacturing (AM),...

Postdoctoral vacancy (3 years) on high-frequency vibration techniques for non-destructive inspection of 3D printed metal parts

 

The use of 3D printed metal structures is taking a very fast ramp-up in industry. General Electric has demonstrated the possibility of printing titanium fuel injectors for their LEAP engine, EADS has printed a nacelle hinge bracket for the Airbus A320, Boeing is printing plastic inlet ducts for high-altitude aircrafts, hip implants and other prosthetics are exploiting the design freedom of additive manufacturing (AM),...

emadmoeen1's picture

PhD Studentship in Mechanical Engineering at UCL, UK

Description: Outstanding applications are invited to join the Department of Mechanical Engineering at UCL as part of an EPSRC industrial CASE (iCASE) PhD studentship. The PhD project is being jointly supervised by Professor Ian Eames and Dr Emad Moeendarbary from the Department of Mechanical Engineering (University College London, UCL) and Dr Alireza Azarbadegan from BP plc (British multinational oil and gas company).

Antonio Papangelo's picture

Cyclic response of friction damped mechanical systems - PhD thesis - part II

This is the "part II" of my PhD thesis.

It addresses the problem of finding the dynamic cyclic response of mechanical systems experiencing dry friction with a particular focus on the influence of varying normal and tangential loads. I first start from a single degree of freedom model and gradually increase the complexity of the system. In the last chapter I address a system with 12 degrees of freedom which shows localized vibration states, that are very similar to solutions known in other physics fields like optics and fluid dynamics. 

Ahmed Elbanna's picture

Localization and instability in sheared granular materials: Role of friction and vibration

Shear banding and stick-slip instabilities have been long observed in sheared granular materials. Yet, their microscopic underpinnings, interdependencies and variability under different loading conditions have not been fully explored. Here, we use a non-equilibrium thermodynamics model, the Shear Transformation Zone theory, to investigate the dynamics of strain localization and its connection to stability of sliding in sheared, dry, granular materials. We consider frictional and frictionless grains as well as presence and absence of acoustic vibrations.

pragtic's picture

WCFA2016-VFA – Workshop on Vibration Fatigue Analysis

Dear iMechanicians,

I would like to inform you about the workshop WCFA2016-VFA, which is this year organized with the focus set on Vibration Fatigue Analysis. The workshop will be held at the Czech Technical University in Prague, Czech Republic from November 8 to November 10, 2016. The introductory lessons in the first day will be presented by Prof Darrell Socie, Prof Milan Ruzicka and Dr Jan Papuga, while the main topic - Vibration Fatigue Analysis - will follow in next two days and will be covered by Dr Neil Bishop.

Open position (Post-doc)

Employment as an assistant researcher (Post-doc) at the project OPUS from National Centre of Science.

Details: http://www.perlikowski.kdm.p.lodz.pl/project.html

Postdoc position on multi-scale modelling of composites vibration response @ Ghent University (Belgium)

Nowadays, there is an increasing interest to use composite materials in automotive applications, in particular the use of fibre-reinforced plastics (carbon or glass fibres in a polymer matrix) is widely considered. The use of lighter materials, and hence a reduced fuel consumption, can be one of the possible solutions for reduced CO2 emissions.

Postdoc in multi-scale modelling of composites vibration response @ Ghent University (Belgium)

Nowadays, there is an increasing interest to use composite materials in automotive applications, in particular the use of fibre-reinforced plastics (carbon or glass fibres in a polymer matrix) is widely considered. The use of lighter materials, and hence a reduced fuel consumption, can be one of the possible solutions for reduced CO2 emissions.

Ji Wang's picture

Sharing a book draft on the vibration analysis of quartz crystal resonators

In collaborations with industrial engineers on the design and analysis of quartz crystal plate resonators, which involves the high frequency vibrations of piezoelectric plates with Mindlin plate equations, we have to go through the details of plate equations for every stages in the analysis.  In addition, complications and bias fields are also considered.  We have put together our papers and written a draft of a book detailing essential equations and methods.  We now share this draft with you if you would like to read some documents to know insights on this particular subject.

Ji Wang's picture

Faculty Positions in ALL Levels with the School of Mechanical Engineering & Mechanics, Ningbo University 宁波大学机械工程与力学学院招聘启事

The School of Mechanical Engineering and Mechanics, Ningbo University, is looking for cadidates for all subjects in the broad field of mechanical engineering and mechanics.  In addition to traditional field of impact and shock waves, piezoelectric devices, material durability, and metal forming, the school are also initiating new directions like vechicle engineering, fluid mechanics, occean engineering, solid mechanics, thermodynamics, vibrations, strength, and other related subjects.

Forced vibration

Here is how I have carried out the forced vibration
simulation. After an “intial step”, I chose “Linear Perturbation” to first
extract the natural frequency. My next step was “Modal Dynamics”. I then
applied the load in the form of a sine wave under the same step. I have an
isotropic material. When I try to submit the job, I received following warning:

Ji Wang's picture

Faculty Positions in School of Mechanical Engineering & Mechanics 宁波大学机械工程与力学学院招聘启事

The School of Mechanical Engineering and Mechanics, Ningbo University, is looking for cadidates for all subjects in the broad field of mechanical engineering and mechanics.  In addition to traditional field of impact and shock waves, piezoelectric devices, material durability, and metal forming, the school are also initiating new directions like vechicle engineering, fluid mechanics, occean engineering, and other related subjects.

Positions in ALL ranks are available.  Currently we are taking applications for 2014 school year.

Traffic-induced vibrations of frame structures

A paper titled "Traffic-induced vibrations of frame structures" (Marija Nefovska Danilovic, Mira Petronijevic, Branko Šavija), related to Branko Šavija's diploma thesis work, has been published in the Canadian Journal of Civil Engineering.

Abstract:

Payam Soltani's picture

Vibration of wavy single-walled carbon nanotubes based on nonlocal Euler Bernoulli and Timoshenko models

Vibration of wavy single-walled carbon nanotubes based on nonlocal Euler Bernoulli and Timoshenko models

By: Payam Soltani, A Kassaei, M M Taherian and A Farshidianfar

Structural Engineer / FE Analyst

TitanX is strengthening its numerical simulation capabilities. As part of this process, we are looking for two additional FE Analysts.

The exact scope and location of each position can to some extent be adjusted, function of the applications we will receive. We therefore encourage anyone looking for new challenges and exciting opportunities in the field of simulation to send their CV to our Group Simulation Manager, Jean-Baptiste Leydet. E-mail: jean-baptiste.leydet@titanx.com

Prof. Neil Stephen is honoured for his outstanding engineering research paper

Neil Stephen, Professor of Structural Mechanics at the University of Southampton and editorial board member of the International Journal of Solids and Structures has received the first Doak Prize for an outstanding journal paper On Energy Harvesting from Ambient Vibration (JSV, 293,1/2, pp 409-425).

What's that Car Noise? New SIMULIA Tech Brief Available: NVH Analysis with Rolling Tires

The sources of noise in a vehicle are many, including the engine, driveline, tire contact patch and road surface, brakes, and wind to name a few.  A Noise, Vibration, and Harshness (NVH) engineer is tasked with predicting these noises early in the design phase to make the necessary adjustments to ensure a harmonic ride, so to speak. The latest SIMULIA Tech Brief illustrates the effects that rolling tires have in contributing to NVH.

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