Blog posts
Membrane interactions control residues fluctuations of outer membrane porins
Bacterial outer membrane porins (Omp) that have robust ß-barrel structures, show potential ap-
plications for nanomedicine devices in synthetic membranes and single molecule detection biosensors.
Here, we explore the conformational dynamics of a set of 22 outer membrane porins, classified into
five major groups: general porins, specific porins, transport Omps, poreless Omps and composed
pores. Normal mode analysis, based on mechanical vibration theory and elastic network model, is
Effect of surface tension on swell-induced surface instability of substrate-confined hydrogel layers
This paper has been accepted for publication in Soft Matter. DOI: 10.1039/c0sm00335b.
What is stress? Who has ever seen stress? Is stress a physical quantity?
What is stress? Who has ever seen stress? Is stress a physical quantity?
Professor Yi-Heng Chen, Xi’an Jiaotong University, 710049, P.R.China
e-mail: yhchen2 [at] mail.xjtu.edu.cn (yhchen2[at]mail[dot]xjtu[dot]edu[dot]cn)
In fact, this question has been bothering the present author for more than 15 years.
Simulation ENF Specimen with Fibre Metal Laminates in ABAQUS
Hello everybody,i am trying to analyze a Fibre Metal Laminate ENF specimen for crack porpagation with ABAQUS. Therefore i am using the VCCT method. The model is running, but not with the expected outcome. The problem is that there is no crack propagation, as Mode II energy release rate is Zero. I really don't know why. I am using the "composite layup" function with continuum sheels and SC8R reduced integration continuum shell elements. To get an ENF specimen iam stacking this layup and model a frictionless contact between.
concrete damaged plasticity considering strain rate
Hi all,
Concrete is sensitive to strain rate. I want to create a model for a reinforced concrete plane frame. The material model used for concrete is concrete damaged plasticity, and the element type is B21. I want to consider strain rate effects of concrete(strength). The problem is that ABAQUS can not work after considering strain rate effects of concrete when the concrete yields. Can you help me? Thank you in advance.
Tension in screw because of moment in section
Hi,
In a section of a beam with a rectangular hole which has got crack (see attached picture); Moment and shear are specefied. I can undrestand why we have tension in the screw because of the shear but why do we have tension because of moment in the screw? Can anybody explanin me why moment in the section can cause tension in the screw which should be accounted for in the screw design.
Thank you,
Parisa
About the air Dam
The air dam, or front spoiler, of your automobile may appear to be a part of questionable need. Like a rear spoiler, the intention of the air dam is really just to redirect air and improve the aerodynamics of your vehicle. Is the air dam actually necessary?
Resource for this article: All about the Air Dam
Positive aspects of having an air dam
New perspective on Couple Stress theory resolving the indeterminacy issue
Dear fellow Mechanicians,We have done this research on couple stress theory which we believe has resolved the problem of indeterminacy in the spherical part of the couple-stress tensor and the appearance of the body couple in the constitutive relation for the force-stress tensor (Mindlin and Tiersten, 1962).I humbly request you to read the paper and give me your feedback. I believe you would agree this is an important issue in Continuum Mechanics which can open up new frontiers.Sincerely,
Ali Reza Hadjesfandiari