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Crack formation in thin film during deposition process


Dear Researchers,  

I am a research student, "Surface modification of materials" is my research topic. I joined your site to discuss the crack propagation during thin film deposition.

Andrew Bunger's picture

"Crack" versus "Fracture"

 It seems that within the field of fracture mechanics, some authors use "fracture" to refer to the mechanism of creating new surfaces within a body by breaking the material bonds and reserve the word "crack" for the sharp-tipped discontinuity that results from fracture of a brittle material. But it does not appear that this distinction is followed consistently throughout the literature, and perhaps different research areas within the fracture mechanics field use the two words in different ways.

Faxin Li's picture

Questions on ferroelectrics: why tetragonal ferroelectric ceramics are difficult to pole while rhombohedral ceramics easy to?


It may be well known to researchers on ferroelectrics that tetragonal ferroelectric ceramics, such as BaTiO3, Ti-rich lead titanate zirconate (PZT), are difficult to pole even using a high DC field with long holding time. While the rhombohedral PZT or PZT near the morphotropic phase boundary (MPB) are easy to pole, especially the latter. Why?


Andrew Bunger's picture

Post doctoral position in geomechanics at CSIRO Petroleum, Melbourne, Australia

The post doctoral fellow will be engaged in research on the mechanics of hydraulic fracturing of rock. The primary aim of this project is to investigate, using a novel approach for experimentation spanning laboratory and field scales, the effect of fracture size on the energy required for fracture extension in rock.

Roozbeh Sanaei's picture

Is it possible to find a way to more categorization of information in Imechanica?

Information in Imechanica is a little dispersed it is good in its present form but is it possible to categorization of information more?

Carl T. Herakovich's picture

Call for IUTAM Symposia & Summer School Proposals

ADVANCED CALL FOR PROPOSALS: IUTAM SYMPOSIUM and INSTRUCTIONAL SUMMER SCHOOLS for 2010 and 2011 (Proposals due no later than January 15, 2008)

The United States National Committee on Theoretical and Applied Mechanics (USNC/TAM) seeks proposals from U.S. authors and institutions to host IUTAM (International Union of Theoretical and Applied Mechanics) Symposia or IUTAM Instructional Summer Schools in 2010 or 2011.


PLASTICITY 2008, Sheraton Keauhou Bay Resort, Kailua/Kona (Big Island of Hawaii) January 3-8, 2008

FIRST CIRCULAR (Dated September 28, 2006)

First AAM 2008 Conference

On June 17-20, 2008 the Inaugural Conference of the American Academy of Mechanics will be hosted in New Orleans, Louisiana. Following this conference this event will be hosted in the USA every four years to coincide with the ICTAM conference. This meeting will help the mechanics communities with applications in solids, fluids, bio, etc. to interact and set new challenging concepts and refinements in the existing areas of Mechanics.

Zhigang Suo's picture

The incomplete guide to the art of discovery

The warm reception to a previous post on learning to be a PhD advisor reminded me of a book, whose  title now appears as the title of this new post.  The book was written by Jack E. Oliver, a geologist, and was published in 1991 by Columbia University Press.  Looking at the book again the other day, I found the original receipt, dated 19 October 1991, from Chaucer's Bookstore, in Santa Barbara, where I started as an assistant professor at UCSB in 1989.  How delightful! 

A Local Semi-Implicit Level-Set Method for Interface Motion

This paper proposes and implements a novel hybrid level set method which combines the

post doc position in Dept of MAE at Univ. of Miami -- position filled

This position has been filled and many thanks to imechanica and those who helped in distributing the news ...


Rowland Junior Fellowship at Harvard University (30 Nov Deadline)

I am writing to draw your attention to our annual solicitation for applications to Rowland Junior Fellows Program, which may be of interest to your graduate students and postdoctoral fellows.

We have currently eight Rowland Junior Fellows at the Institute. As a look at our website will tell you (, they work on a broad range of topics, from condensed matter physics to plant physiology.

L. Roy Xu's picture

Openings for New Ph.D. Students on Composite Materials and Failure Mechanics at Vanderbilt University, USA

New students may start from January 2008 if the graduate students have previous research experience in solid mechanics (e.g., nano/micro-mechanics, computational mechanics) or material engineering (MD simulation, mechanical behaviors). Students will have the opportunities to conduct balanced experimental and computational work on the durabilty and impact failure of marine composite materials; failure and material designs of nanocomposite materials; or rehabilitation of infrastructure materials using composites and other materials.  An MS degree is required.

Amir Siddiq's picture

When is the right time for a Post Doc. to start applying for a lecturership position?

I normally come across many advertisements about lecturership positions in different universities all around the world. And I always wonder when is the right time for a post doc. to apply for it? As, I am never sure that my experience will be enough for the position.

What are the necessary ingredients of a post doc.'s CV, that should help him getting such position?

Dean Eastbury's picture

10% "early bird" discount off full registration fee for 2nd IC Mechanics of Biomaterials & Tissues - offer closes 26 October!

Elsevier is offering a 10% discount off the full registration fee for the 2nd International Conference on the Mechanics of Biomaterials & Tissues ( This offer will end on 26 October 2007.

I hope you are able to come to Kaua'i and take part in this exciting and well-received conference.

Dean Eastbury

Publisher, Elsevier 

Dean Eastbury's picture

Reminder - abstract submission deadline for 5th IC Fracture of Polymers, Composites & Adhesives!

The abstract submission deadline for this next conference in the triennial Fracture of Polymers, Composites & Adhesives series ( is 2 November 2007.

Arash_Yavari's picture

Covariance in Linearized Elasticity

In this paper we covariantly obtain the governing equations of linearized elasticity. Our motivation is to see if one can make a connection between (global) balance of energy in nonlinear elasticity and its counterpart in linear elasticity. We start by proving a Green-Naghdi-Rivilin theorem for linearized elasticity. We do this by first linearizing energy balance about a given reference motion and then by postulating its invariance under isometries of the Euclidean ambient space.

ravi5kumar's picture

AFM modelling

Hi, every body...

Can anyone please tell me about the kind of modelling that is done to study the Atomic Force Microscope (AFM) ?

I have gone through the lumped mass models, but I want to know about the distributed models ?

Is anyone having some papers or links related to distributed modelling of AFM ?

Thank You......

Zhigang Suo's picture

The number of registered users of iMechanica reaches 4000

Launched on September 11, 2006, iMechanica is the web of mechanics and mechanicians.  The mission of iMechanica is twofold:

Nanshu Lu's picture

Travel Fellowships to ICTAM 2008

U.S. National Committee on Theoretical and Applied Mechanics
Travel Fellowships to ICTAM 2008

Joseph X. Zhou's picture

Research experience from a physicist

Just back from Prof. Mahir Hussein's seminar. He is really one of best physicist I  have ever met. In past 30 years, he published more than 200 papers in the field of nuclear resonance, laser accelerated particles etc. There are more than 30 papers published in PRL alone. When input his name " M.Hussein" in, you can easily found 95 papers by him.

Teng Li's picture

The Future of Conference

Attending conferences is one of the essential professional activities for scientific researchers. Conferences take various forms, such as community-wide meetings (e.g., MRS meetings, ASME congress, APS meetings), and topic-focused meetings/workshops (e.g., Plasticity07, Gordon Research Conferences(GRC)).  While people have different preferences on the types of conference to attend (e.g., see a recent iMech poll initiated by Biswajit Banerjee ), here are some common positive driving forces to motivate one to attend a conference:


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