Blog posts

Mechanics of in-surface buckling of one dimensional nanomaterials on elastomeric substrates

Submitted by Jianliang Xiao on Sat, 03/06/2010 - 05:29

research

nanomaterials

mechanics

elastomeric substrate

in-surface buckling

In this recently published paper on Nanotechnology, we studied the in-surface buckling mechanics of one dimensional nanomaterials on elastomeric substrates. Simple analytical solutions are obtained for buckling wavelength and amplitude, which can be easily applied to the in-surface buckling of different nanomaterials, such as nanowires and nanotubes. It is shown that in-surface buckling of nanomaterials has lower energy than out-of-surface buckling, which explains the experimental observance o

Analysis of beams with hole

Submitted by parisa on Fri, 03/05/2010 - 22:34

research

Change in stress intensity factors

Hi everybody,

Is there any limits for using of LEFM? I have modelled a beam with a penetration.I have moved the holes vertically in the beam and obtained the stress intensities for each movements at the corners of the hole. Now the hole is closing the edge, stress intensities in mode I and II, suddenly change values (positive to negative and vice versa) what does this mean ?... Does it mean that I should limit my movements?,,,,

Thank you,

Parisa,

Webinar Series: Containers, Spacecrafts, Wind Energy

Submitted by Twebb83 on Fri, 03/05/2010 - 19:10

Simulation Driven Design for Containers

Tuesday, March 9 – 11 a.m. EST

>> Register now

Simulation Solutions for Spacecraft

Tuesday, March 16 – 11 a.m. EDT

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Accelerate Development of Wind Energy

Tuesday, March 23 – 11 a.m. EDT

Postdoc position in vascular mechanics

Submitted by HCHan on Fri, 03/05/2010 - 16:58

job

The Cardiovascular Biomechanics Lab in the Department of Mechanical Engineering at The University of Texas at San Antonio (UTSA) is seeking a highly motivated postdoctoral fellow to join our research team. The position is supported by a research grant from the NIH to study the mechanical stability and tortuosity of blood vessels. Qualifications include a doctoral degree in BME or ME in computational fluid mechanics, or computational biomechanics.

Integrity of Scholarly Publishing under Attack

Submitted by Frankxu on Fri, 03/05/2010 - 15:42

opinion

This issue of CAM digest re-published D.N. Arnold's article "Integrity under Attack - the state of scholarly publishing". The orginal article is available via weblink

http://www.ima.umn.edu/~arnold/siam-columns/integrity-under-attack.pdf

ES247: Fracture Mechanics, Fundamentals and Applications. 3rd Edition

Submitted by Kejie Zhao on Fri, 03/05/2010 - 13:18

The book I recommend for reading is Fracture mechanics: fundamentals and applications, by T.L.Anderson, 3rd edition, 2005. I first saw this book on the top list of reading materials of Brown U. When I have it I found so pleasent to read through it. Here is the short-list of its content

Chapter 1: Introduction: History and overview

Chapter 2:Fundamental concepts: linear elastic fracture mechanics

Chapter 3: Elastic-plastic mechanics

Chapter 4: Dynamic and time-dependent fracture

Chapter 5: Material behavior: Fracture mechanics in metals

Cohesive Zone Meshing in ANSYS

Submitted by chidambar.13 on Fri, 03/05/2010 - 09:25

Hello,

I am trying to simulate crack propagation in ANSYS. I am stucked in Cohesive Zone meshing.

I have gone through all the posts posted here.

I have understood that CZ Meshing is done through command line ANSYS. Even I gave try for it but was unfortunate.

Torsion in Trapezoidal bars

Submitted by mehditab on Fri, 03/05/2010 - 07:45

research

Hi evrey body,

Does anybody have an idea for solving torsion equation for trapezoidal bars? Or any references? For rectangular bars Timoshenko completely did it in in "Theory of Elasticity" pages 309-313, but I could not find any references for trapezoidal cross section.

Best Regards

------------

M.Taban