Blog posts

About

Submitted by chao_xu on Fri, 02/26/2010 - 07:03

Chao Xu received his B.S. and PhD from Northwestern Poly-technical University (NPU) in 2002 and 2007. He spent one year working as a post-doctoral fellow at University of Canterbury from 2013 to 2014. He is currently a full professor of structure mechanics and aerospace engineering at School of Astronautics, Northwestern Polytechnical University.

His research interests include:

1) structural health monitoring of aerospace structures

2) mechanics and design of composite structures, visocoelastic sandwich structures

ES 247 Fracture Mechanics Homework Problems 13-16

Submitted by Zhigang Suo on Fri, 02/26/2010 - 04:24

Due in class, Thursday, 4 March 2010

Resistance Curve

Submitted by Zhigang Suo on Fri, 02/26/2010 - 03:34

fracture mechanics

ES 247

Spring 2010

These notes were initially written when I taught fracture mechanics in spring 2010, and were updated when I taught the course again in 2014.

You can access all notes for the course on fracture mechanics.

Postdoc position in Bioacoustics

Submitted by Petr Krysl on Fri, 02/26/2010 - 00:53

Postdoc position is currently open in my group. The research revolves around bioacoustics of marine animals (mammals and fish). The goal is to understand the mechanics of sound production and hearing. Research directions include formulation of specialized finite element models for biological materials, mesh generation from biomedical images, and models for attenuation in tissues. Funding is available for at least one year. Contact: pkrysl-at-ucsd.edu.

representative elementary volume of non-local continuum

Submitted by WaiChing Sun on Thu, 02/25/2010 - 17:51

non-local continuum

REV

Dear mechanicans,

For non-local continuum, is there a proper approach to determine the size of the REV in experiment? For the classical linear elastic continuum, one can measure the homogeneized stress and strain (or local averaged stress/strain) and compute a homogeneized elastic constitutive tensor. However, I am not sure how to do it for non-local continuum, since the constitutive response is now sensititve to the gradient term. Any comment/suggestion is appreciated.

Regards,

WaiChing Sun

International Journal of Applied Mechanics (IJAM) Vol.2 No.2

Submitted by zishun liu on Thu, 02/25/2010 - 15:32

journal

IJAM

Forthcoming papers of International Journal of Applied Mechanics (IJAM) Vol.2 No.2:

1．“Micro-Constituent Based Viscoelastic Finite Element Analysis of Biological Cells”, F. Cheng, G.U. Unnikrishnan, and J.N. Reddy (Texas A&M University, USA).

2. “Interfacial Shear Effect on Herringbone Pattern of Thin Films on Compliant Substrates”, Jizhou Song (University of Miami, USA)

A general question on dynamic structure problem: spatial resolution of high-frequency modes typically is poor by using the...

Submitted by Xiaogai Li on Thu, 02/25/2010 - 14:00

finite element

dynamic strcture

high-frequency modes

Hi Everyone,

I have a general question about dynamic strcture problem,

I read from some books that "spatial resolution of high-frequency modes typically is poor by using the conventional finite element spatial domain discretization"?

Could someone explain more on this? Does it because the element usually is not fine enough to capture the high frequency response or...?

Thanks a lot!

BR,

Abaqus Result viewing

Submitted by Zartasha Mustansar on Thu, 02/25/2010 - 11:55

research

Hi everyone

Can anyone advise on how to select stress values at specific points in a model once the job is executed?

I am interested to extract the stress values from specific points (nodes) in a model.

Many Thanks.

Zartasha

Notch stress distributions

Submitted by michele.zappal… on Thu, 02/25/2010 - 07:04

research

Linear and nonlinear Notch stress fields

Dear all,

this is for all people interested in notch analyses.

In the links below you can find some recent works of mine about linear and nonlinear stress distributions for different kind of notches under torsion.

Hope they will be useful to someone:

http://www.springerlink.com/content/5v536n0026v42586/?p=e7c8da446d524e7…