When a dielectric is placed in an electric field, it becomes polarized - positive and negative charges are separated, producing polarization defined as dipole moment per unit volume. Simultaneously, the dielectric experiences electrostrictive strain that is quadratic to polarization, though it is usually negligibly small. However, if the dielectric has no symmetry center, relatively large piezoelectric strain proportional to the electric field is also possible. Among 21 crystalline classes without a symmetry center, 20 of them are piezoelectric, within which 10 of them possess a unique polar axis that is spontaneously polarized, referred to as pyroelectric, whose spontaneous polarization varies with temperature. If such spontaneous polarization can be reversed by an external electric field, then the pyroelectric is also ferroelectric, and ferroelectricity refers to switching of spontaneous polarization in pyroelectric.
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- Full list of PDF files of papers from the Suo Group
- Slides of research presentations
Congradulations to Professor Yonggang Huang to receive 2013 ASME Daniel C. Drucker Medal for his "fundamental and applied contributions to mechanics of materials and structures across multiple scales." The Daniel C. Drucker medal was established in 1997 and is conferred in recognition of distinguished contributions to the field of applied mechanics and mechanical engineering through research, teaching and service to the community over a substantial period of time.
Here is a list of DANIEL C. DRUCKER MEDALISTS
Fourteenth Pan American Congress of Applied Mechanics (PACAM XIV) will be held
in Santiago, Chile, from March 24th to 28th, 2014, in collaboration with Universidad de Chile and Universidad de los Andes.
A postdoctoral position is available to conduct research in
the multi-physics modeling and analysis of DNA-based nanostructures. The
research is conducted jointly with Professors Mark Bathe and Klaus-Jürgen Bathe
at MIT. The candidate should be familiar with nonlinear finite element methods.
Please email your application to:
"Prof. KJ Bathe" <email@example.com> with the subject heading "Modeling DNA-based Nanostructures".
Has anybody the full pdf version of
Handbook of Adhesion Technology from dasilva??
please share the pdf version of this book with me...thank you very much !
please send me a link to firstname.lastname@example.org : for exampl, using dropbox...
We are deeply sorry to report that Fred Leckie died on Friday, 14 June 2013, at the age of 84. A brief description of Fred's career is contained in the 2000 ASME Materials Division Newsletter, when Fred received the Nadai Medal.
The funeral is at Christ Church, 1415 Pelhamdale Avenue, Pelham Manor, NY 10803, on Friday June 21st, at 10am. In lieu of flowers, a contribution can be made to the University of St. Andrews American Foundation Inc with a note for it to be applied to bursaries for Scottish students in memory of Fred Leckie.
This paper is now in Press and available on line at the Intenational Journal of Mechanical Sciences.
This paper is now in press at Finite Element Analysis and Design International Journal.
We have opportunities for PhD students to join Qatar University. The candidate should have the Master's degree with a specific interest in Composite materials. Experience in experimental and numerical simulation is valuable. The project is three years within which the student should finish his/her degree.The candidate should have at least one publication. Non native English speakers should have the ILETS (6.5). The salary is high and more benefits (including flight tickets and international schools for the children) are applicable.
For more information please contact me email@example.com
Please see the attached files.
how to do modelling in abaqus for high strain rate. i am beginner. please help me regarding this. i have theoretical idea about johnson cook model.
i have umat file but i dont have any idea that where should i apply this filename.for file in abaqus..i have made my model and made UMAT subroutine ...can someone please help me with this
I am new to modelling and am trying to model a plate with a middle crack using Abaqus.
What is the difference between modelling a cohesive and LEFM crack growth (I know cohesive involves plasticity and the traction/displacement curve and LEFM is for brittle materials).
For cohesive, I used max principal stress for damage criteria and damage evolution based on energy criteria.
For LEFM I also used the above and only change I made was I used (VCCT BK Law) in interaction properties tab. I cannot see any difference between the cohesive and LEFM in visualization for example S11, S22 values near the crack-tip.
(Fall 2013 MRS) Symposium VV: Designed Cellular Materials—Synthesis, Modeling, Analysis and ApplicationsSubmitted by William Carter on Fri, 2013-06-14 20:06.
We wanted to make sure everyone knew about this symposium, tucked away under the nanotechnology category, for the fall 2013 MRS meeting. Abstracts are due soon. We expect a heavy mechanics component for this symposium.
MRS Symposium VV: Designed Cellular Materials—Synthesis, Modeling, Analysis and Applications
My name is
Seyed Mohammad Elahi. I am a BSc student in mechanical engineering of Yasouj
University. I am writing to apply for a PhD position. During my undergraduate
study I have published
a journal paper and presented three conference papers. My researches are on
metal materials and their energy absorption capability. My detailed resume is attached to
this blog entry.
2014 MRS Spring Meeting Symposium P: Mechanics of Energy Storage and Conversion—Batteries, Thermoelectrics and Fuel CellsSubmitted by jiangyuli on Fri, 2013-06-14 05:02.
My name is Seyed Ahmad
Elahi. I am a bachelor of science student in mechanical engineering from Yasouj
University. During my undergraduate study I have published a journal paper and presented three conference papers on the energy absorption of metal columns.
I would like to apply for a PhD position.
Ying Li , Brendan C. Abberton , Martin Kröger and Wing Kam Liu
The Institute for General Material Properties of the Friedrich-Alexander-
Universität Erlangen-Nürnberg is seeking outstanding candidates for a
collaborative research project with the Ruhr-Universität Bochum
(SFB/Transregio 103 ) on high-temperature deformation of superalloys.
Call for Abstracts
Technical University of Denmark (DTU) and University of Wyoming (UW) jointly organising a conference on wind energy. Organisers invites you to submit an abstract for consideration for the International Conference on Future Technologies for Wind Energy on October 7-9, 2013, Laramie, Wyoming, USA. The deadline for submission is July 15, 2013. Abstracts should be no longer than two pages including figures. Full paper submissions should be no longer than 6 pages.
For more details refer the following webpage:
Early-bird registration will open August 22, 2013.
Early-bird registration: $200.00
Regular registration: $250.00
We have a new position for posdoc in Qatar University. The main topic is using natural fibers in composite materials for particular structural applications. The job requires a previous experience in natural fiber composites. In addition, experimental and numeriacl tools are desirable. The salary is high (better than any other place). In addition, there are more benifits regarding schools of your children and the plane tickits. For more information, please contact me firstname.lastname@example.org.
I am working on Crack growth analysis of Turbocharger wheel and shaft assembly. I have simulated it as an axisymmetric problem with fine mesh around the cracktip(in Ansys). Element used is Plane182.
I have to compare the K1 and K2 values obtained from both the Displacement Extrapolation Method and J-Interal method.
I got the K1 an K2 values at the cracktip location by defining path using displacement extrapolation method.
But, I was not able to get the Stress intensity factor values (K1 nad K2) using J-Integral Method.
Please help me in this probem.
Thanks in advance.