Blog posts
Post-Doc Position in Experimental Impact Mechanics Available at Sandia National Laboratories
Job Title Experimental Mechanics Postdoctoral Appointee
Job ID 653894
Location Albuquerque, NM Department 01528
| ||||||||||||||||||||||||||||||||
PhD position in computational solid / fracture mechanics
Hello,
I have a PhD position available for a project titled "A stochastic and computational approach for fracture modeling of quasi-brittle materials" funded by the U.S. National Science Foundation (NSF). This project homogenizes material properties using the so-called stochastic volume elements (SVEs). Based on the enderlying statistical properties derived from these SVEs, realizations of certain material properties are generated. These realizations are subsequently used for stochastic characterization of fracture response in quasi-brittle materials.
Simulate graphene layers in Abaqus/Explicit
Dear all, I want to simulate graphene layers in Abaqus/Explicit. To connect two layers, I follow van der Waals forces and apply non-linear spring elements. One problem I have faced is how to choose the unit scale when simulating. If I choose SI(m) or SI(mm), I can not get the visualization of simulation results. I have read some papers which talk about using A, ev/A and eV/A3 for length, force and Young's modulus.
Because I use non-linear spring element, I have to use Abaqus/Explicit. But to run Abaqus/Explicit, I have to define mass density of graphene layers.
Call For Abstracts: 2016 SES Symposium D-12 Mechanics, Materials, and Manufacture of Flexible and Stretchable Electronics
Dear colleagues,
You are cordially invited to submit abstract(s) to Symposium D-12 Mechanics, Materials, and Manufacture of Flexible and Stretchable Electronics at the 2016 SES meeting to be held at the University of Maryland-College Park during October 2-5, 2016. Abstracts can not be more than 350 words and are due on Wednesday, June 15, 2016.
CALL FOR ABSTRACT: SES 2016 Symposium C-2: Mechanics of Biological and Bioinspired Materials
Dear Colleagues,
We hope this message finds you well. We are organizing a symposium entitled "Mechanics of Biological and Bioinspired Materials" at The Society of Engineering Science (SES) 53rd Annual Technical Meeting at University of Maryland, College Park, from October 2–5, 2016. The deadline abstract submission is June 15, 2016.
ANSYS APDL converge problem
My model has contact elements under static loads.
It converges in ANSYS 13 but when I run my script in ANSYS 17, it diverges!
I tried several solutions such as increasing the nimimum steps but still the problem exists.
Please let me know your solution for this problem.
Thank you.
Hamid.
[Call for Abstract] [SES 2016 2D Materials Symposium E-5] Join the talk of our Invited Speakers! (as of 6/14)
Confirmed Invited Speakers:
Philip Kim (Harvard University)
Huajian Gao (Brown University)
Markus Buehler (MIT)
Xi Chen (Columbia University)
Harold Park (Boston University)
Evan Reed (Stanford University)
Through thickness residual stress
I am modeling through thickness residual stresses as follows:
*Initial Conditions, Type=Stress, Section Points
all_elements, 1, 50,25, 0
all_elements, 2, 50,25, 0
all_elements, 3, 50,25, 0
all_elements, 4, 50,25, 0
.
.
ABAQUS documentation 6.14:
Data lines for TYPE=STRESS, SECTION POINTS:
First line:
Element number or element set label.
Section point number.
Value of first stress component.
Value of second stress component.
Etc., up to three stress components.
*Initial Conditions, Type=Stress, Section Points
all_elements, 1, 50,25, 0
all_elements, 2, 50,25, 0
all_elements, 3, 50,25, 0
all_elements, 4, 50,25, 0
.
.
ABAQUS documentation 6.14:
Data lines for TYPE=STRESS, SECTION POINTS:
First line:
Element number or element set label.
Section point number.
Value of first stress component.
Value of second stress component.
Etc., up to three stress components.
An efficient computational technique for modeling dislocation–precipitate interactions within dislocation dynamics
A new computational technique for modeling dislocation interactions with shearable and non-shearable precipitates within the line dislocation dynamics framework is presented. While shearable precipitates are modeled by defining a resistance function, non-shearable ones are modeled by drawing a comparison between the two well-known Orowan and Frank–Read mechanisms. The precipitates are modeled directly within the dislocation dynamics analysis without the need for any additional numerical methods.