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Fiber Composites Failure Criteria

  A new failure criterion has been formulated for fiber composite materials.  It is the anisotropic counterpart of a recently derived isotropic criterion.  The targeted applications are for carbon fiber, polymeric matrix (or equivalent) types of materials.   The complete treatment can be accessed at the new website:                                                                 http://www.failurecriteria.com

Postdoctoral position in multiscale modeling at RPI

There is an opening for a postdoctoral research position in the Advanced Computational Research Laboratory at RPI, Troy, NY.to work on an ongoing project sponsored by the Office of Naval Research. The project involves the multiscale modeling of particulate composites under extreme loading conditions. This is a great opportunity to be involved in challenging
multiscale computational techniques based on meshfree methods. Encouraged to
apply are creative, self-motivated candidates with a sound background in
computational mechanics.

Ying Li's picture

Buckling behavior of metal film/substrate structure under pure bending

Many studies on the thin film/substrate structure and its failure mechanism were reported in recent years. The direct experimental results of thin film/substrate structure by scanning electron microscopy (SEM) presents an intriguing problem:there exists a buckling failure mechanism at the lateral edge of metal film under pure bending. The qualitative theoretical analysis has been done on such buckling failure of thin film/substrate structure.

Roberto Ballarini's picture

Tension Testing of Individual Collagen Fibrils

In a recent discussion it was suggested that it would be useful to perform tension tests on collagen fibrils. We have developed a MEMS-based experimental procedure that is capable of applying very large strains to individual collagen fibrils. The attached paper presents illustrative data; an upcoming paper will present much more data that illustrates the rich behavior of these fibrils during loading and unloading tests.

ASME IMECE'08 Minisymposium on Recent Advances in Computational Materials Science and Multiscale Materials Modeling

The  mini-symposium focuses on the link between the traditional materials modeling
and computational description of existing and new classes of materials, advanced and composite
materials and their applications. In particular, the mini-symposium is devoted to computational
characterization of material response and processing of material microstructures in the presence
of multiple temporal and spatial scales as well as multiple physical processes, and computational

About piezoelectric resonance.

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For 31 mode piezoelectric plate. I have measured it's electric impedance spectrum (curve of Log IZI~ Frequency). I found that, when I used this plate for a piezoelectric sensor to receive mechanic signals. the maximum output  occured at antiresonance frequency;   For example, for piezoelectric hydrophone or receiving-type piezoelectric transducers, It works at antiresonance frequency (at the maximum electric impedance). 

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 

Mark E. Walter's picture

Symposium Honoring Professor J. W. Hutchinson at IMECE'08 (Boston)

To coincide with this year’s IMECE in Boston, the Fracture and Failure Mechanics Technical Committee is organizing a series of sessions to honor Professor John W. Hutchinson’s seminal contributions as he moves into semi-retirement. The organizers request abstracts in contemporary research related to fracture and failure mechanics. Topics that relate to Professor Hutchinson's many past and present research activities in other areas are also welcome.

What is the difference between RVE and Unit Cell ?

I have been working in composites for sometime now. In the literature I have found that the words  "Representative Volume Element" (RVE) and "Unit Cell" (UC)  are  used frequently.  Some  authors treat them differently and some treat them  same. I am little bit confused can anyone PLEASE clarify the situation or suggest some good papers to read.

 

Thanks In Advance. 

Jintegral and Umat subroutine

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Hello,

Rui Huang's picture

A symposium on Mechanical Instabilities in Polymer Films, Interfaces and Nanostructures

This symposium is part of the Spring 2008 ACS National Meeting and Exposition , to be held at New Orleans, Louisiana, from Sunday, April 6 to Thursday, April 10, 2008.

Organizers: Christopher M. Stafford (NIST), Adam J. Nolte (NIST), Rui Huang (UT Austin)

Sponsors: ACS Division of Polymeric Materials: Science and Engineering (PMSE) and National Science Foundation

Technical Program:

Masayuki Wakamatsu's picture

Cutting Mica Sheet

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Hi iMechanica,

PLASTICITY 2009: Mini-symposium on ‘Routes to Bulk Nanomaterials’

We would like to inform you that we are organizing a mini-symposium on ‘Routes to Bulk Nanomaterials’  as part of the International Symposium PLASTICITY 2009 to be held at the Frenchman's Reef and Morning Star Marriott Beach Resort (St. Thomas, US Virgin Islands), on January 3-8, 2009.

One Postdoctoral/Research Scientist Position in Geometric Modeling and Mesh Generation

A position of postdoctoral fellow or research scientist is available immediately in the group

of Jessica Zhang at Department of Mechanical Engineering, Carnegie Mellon University. 

We are looking for someone with strong software design and development skills coupled

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.

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:-

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