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Central crack loaded with stress

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1. Central crack loaded with stress.

(A) The stress intensity factor for a central line crack in an infinite plate is found to be  

 K=p(πa)^.5

 

where p is the pressure exerted along the crack line. (A) Does this formula imply a stable or an unstable crack propagation when p reaches the critical stress level? (B)  Present an experiment to support your answer in (A). Specify your experiment in details.

Allan F Bower's picture

New (Free!) Solid Mechanics Textbook

I have posted an advanced solid mechanics textbook on http://solidmechanics.org/

It works on Internet Explorer, but may not work on all browsers. Topics include: mathematical descriptions of deformation and forces in solids; constitutive laws; analytical techniques and solutions to linear elastic and elastic-plastic boundary value problems; the use and implementation of FEA; fracture mechanics; and the theory of deformable rods, plates and shells.

Tian Zhi Luo's picture

on-line visualized experiments

Please visit www.jove.com

You'll find tons of video about biological experiments you might be interested in. It is very useful for most of mechanicians who lack this kind of knowledge and experience. Enjoy yourself!

Using Abaqus for orthogonal metal cutting problems

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How do we use Abaqus to simulate the orthogonal metal cutting process and check for values of various parameters during the cutting operations ? I would be extremely thankful to anybody who could assist me on this . Tahnking You in Advance ,

 

Navin  

Introduction to Cohesive Zone and Modelling DCB Test using Cohesive Elements

I am currently working on a project to model DCB test in ABAQUS. My current problem lies in understanding cohesive zone modelling. I was wondering if anyone can forward me a couple of  materials regarding the introduction of cohesive zones?

 This would help me understand the material greatly and help me in modelling the DCB test.

 Another question in ABAQUS:  how do you implement the material properties for cohesive elements? in particular, what values should i be using for them? e.g. E, G1, G2?

Ji Wang's picture

An Introduction Course on Mechanics

 

We are currently offerring an introductory course on mechanics for junior students for all fields and subjects.  It is a so called general knowledge course for students to know more on certain subjects and fields before a decision on choice of a major is made.  Since the Mechanics Department in our University has not been popular for so long, we have decided to evangalize our field with more glorious history of Mechanics: Newton, Bernoulli, Euler, Clausius, Faraday, and Einstein.

Finalists for 2008 Robert J. Melosh Competition

Six finalists for the 20th Annual Melosh Competition for the Best Student Paper in Finite Element Analysis have been announced.  They are:

Ludovic Chamoin, University of Texas at Austin

Irina Kalashnikova, Stanford University

Christian Linder, University of California, Berkeley

Ajaykumar Rajasekharan, Stanford University

Saurabh Srivastava, SUNY Buffalo

Tim Wildey, University of Texas at Austin 

naval architect

good day,

i am a naval architect ,MSc student at ship structure.

i hope i find good ,friends,opinions in this site and be a good replier to your questions too.

Stress concentration at a corner of varying angles, mode I and mode II

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I was looking at the stress concentration at a corner for both a mode I and mode II loading situation.

For reference, see: Carpenter, 1984. Mode I and mode II stress intensities for plates with cracks of finite opening. International Journal of Fracture. V. 26. 201-214. 1984.

The problem that is being addresses is the stress concentration found at a corner in an infine body as seen in the figure below. β=0...π.

vikulp sharma's picture

you tube Video lectures on Finite element methods, Dynamics and Kinematics of machines by NPTEL India

Here is very good chain of full course lectures on - This will be very helpfull for someone new and beginner in this areas.

Finite element methods :- 

http://www.youtube.com/view_play_list?p=A4CBD0C55B9C3878

 Dynamics of machines:-

http://www.youtube.com/view_play_list?p=46AAEDA6ABAFCA78

 Advance strength of materials:-

m_meisam's picture

How Can I use subroutine?

Dear Guys

I use abaqus cae for modeling and wanna know how should I attech subroutine file to abaqus cae file!

Regards

M. Meisam

m_meisam's picture

Two Questions in Concrete Modeling

Dear  Friends
I've 2 questions:
1) I use abaqus cae for concrete modeling and how can I attech a file (subroutine/etc.) to my model?
2) which category I should use for concrete while making a part(shell/solid)? while I'm trying to make a section , only shell section have a rebar layer and solid section dont have this option! what should I do?
Regards
Meisam M.

How to solve the equation?

I have come accross an equation of the form ∂2u/∂x2 + ∂2u/∂y2 - K2 u =0 with the following conditions. y ≥αx,y ≥-αx, x=H.How to solve this equation?.analytically.

Yuhang Hu's picture

final project for ES 240

ppt for ES 240 final project.

damage identification of cylindrical shell structures

Cai Shengqiang's picture

ES 240 Final Project

Attachment is my small final project. My name is Shengqiang Cai.

Nanshu Lu's picture

Singapore International Graduate Award (SINGA)

The Singapore International Graduate Award (SINGA) is a collaboration between the Agency for Science, Technology & REsearch (A*STAR), the National Unviersity of Singaproe (NUS) and the Nanyang Technological University (NTU). PhD training will be carried out in English at your chosen lab at A*STAR Research Institutes, NUS or NTU. Students will be supervised by distinguished and world-renowned researchers in these labs. Upon successful completion, students will be conferred a PhD degree by either NUS or NTU.

Applications

m_meisam's picture

Concrete Modeling

Dear Guys!

I'm looking for a person whom familier with concrete modeling.

is there any one?

m_meisam's picture

Concrete Modeling

Dear Guys!

I'm wanna model the concrete plasticity in abaqus and is it possible to tell me which element type should I use for Concrete modeling?

Regards.

Rui Huang's picture

Engineering Mechanics 388F: Fracture Mechanics

Time: Monday and Wednesday 3:00 - 4:30 pm

Place: WRW 312, University of Texas at Austin

Instructor: Rui Huang, WRW 117D, (512) 471-7558, ruihuang@mail.utexas.edu

    Lecture notes 

    Homework Sets

    Term Papers (with links to abstracts, presentation slides and final reports) 

    the equilibrium stress-strain curve

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    Free Tags: 

     

    hi,

      Consider a polymer for which the potential energy resulting from attractive forces between the chains decreases markedly as the chains are oriented. What can one say about the effect of these forces upon the equilibrium stress-strain curve for that polymer rubber? and how large will be the small-elongation tensile modulus?

    thanks

    Conversion of PSD to Displacement Plot

    Hai

    I want to know how to convert a PSD curve into a Displacement vs Frequency plot.. Pl do help me....

    Arthanareeswaran

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