User login

You are here

ceramics

Amit Pandey's picture

Thermo-mechanical response: Role of Porosity and Microcracking (in particular)

Below are references to some of our ongoing work that is published and is related to study the role of microcracking (in particular) and porosity to the thermo-mechanical response of functional ceramics. This study is  relevant to understand the structural reliability of the systems such as the SOFC's (solid oxide fuel cells) and DPF's (diesel particulate filters).

Dependence of fracture energy of ceramic on loading condition?

Literature suggests that the fracture strength of the ceramic tends to be higher in a dynamic loading condition than in static condition. This relates to the increase in the fracture energy in dynamic processes. Literature refers to an inelastic response prior to failure (Hugoniot elastic limit) the reason behind increased strength. Can anyone explain the phenomenon in a more lucid way, or guide me to an appropriate reference to understand this?

Which is the best model to capture brittle fracture and failure of ceramics at moderate velocities?

Several models have been developed over the past decades to capture the fracture and failure of ceramic materials. JH2, JHB models are widely used for simulating the behavior of armor plates upon ballistic impact. I have a doubt regarding these models. Are these models only valid when the impact velocity is in the order of 1000m/s, as under such circumstances material transitions from elastic to elastic-plastic regime defined by the HEL Pressure? But what about when the impact velocity of the ceramic is around 300-400 m/s (a fraction of ballistic impact)?

Amit Pandey's picture

TMS- 2015 CALL FOR ABSTRACT (Symposium on HIGH TEMPERATURE SYSTEMS FOR ENERGY CONVERSION AND STORAGE)

HIGH
TEMPERATURE SYSTEMS FOR ENERGY CONVERSION AND STORAGE

 

TMS Division: Functional Material Division (FMD
formerly known as EMPMD)

FMD sub-committee: Energy Conversion and Storage

 

Organizers:

Davide Bigoni's picture

Marie Curie PhD position at University of Trento (Italy): deadline June 30

Please, give a look to my research activity at http://www.ing.unitn.it/~bigoni and to my group at http://ssmg.unitn.it

If you are strongly motivated to work with a very active group in Solid Mechanics, we have a PhD position (3 years) available from November 2014, but the deadline for application is June 30, 2014!

The position is on a EU grant and is addressed to numerical/theoretical modelling of ceramics.

For details on the application see the attachment.
 

Amit Pandey's picture

Fuel Cell Ceramics Reliability Summer Intern (Rolls-Royce PLC & LG Corp.)

 Fuel Cell Ceramics Reliability Summer Intern. 

Interested candidates with a background in mechanical, material science. solid mechanics please email your resume to amit.pandey/at/lgfcs/dot/com with the subject title "Fuel Cell
Ceramics Reliability Summer Intern"

 

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

 

Amit Pandey's picture

The Uniaxial Tensile Response of Porous and Microcracked Ceramic Materials

http://onlinelibrary.wiley.com/doi/10.1111/jace.12720/abstract

The Uniaxial Tensile Response of Porous and Microcracked Ceramic Materials

Amit Pandey,§,*,†,‡ Amit Shyam,§,* Thomas R. Watkins,§,* Edgar Lara-Curzio,§,** Randy J. Stafford,¶,* and Kevin J. Hemker||

§Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, 37831 Tennessee

‡Reliability Division, Rolls Royce LG Fuel Cell System Inc., North Canton 44720

Davide Bigoni's picture

Marie Curie PhD position at University of Trento (Italy): deadline September 15

Please, give a look to my research activity at http://www.ing.unitn.it/~bigoni and to my group at http://ssmg.unitn.it

If you are strongly motivated to work with a very active group in Solid Mechanics, we have a PhD position (3 years) available from January 2014, but the deadline for application is September 15, 2013!

The position is on a EU grant and is addressed to numerical/theoretical modelling of ceramics.

For details on the application see the attachement.
 

Davide Bigoni's picture

2-YEAR POST-DOC POSITION AVAILABLE AT SSMG (University of Trento, Italy)

Please, give a look to my research activity at: http://www.ing.unitn.it/~bigoni/

If you are strongly motivated to work with a very active group (http://ssmg.unitn.it) in Solid Mechanics, we have a post-doc position for 2 years available not before October 2012.

The position is on a EU grant (http://intercer2.unitn.it/) and is addressed to constitutive/numerical/theoretical modelling of ceramics.

For details on the application see:

New Editorial Structure for Construction and Building Materials Journal

Professor Luigia Binda, one of the foremost authorities in masonry research, and in particular the restoration of historic buildings, steps down from her role as European Regional Editor of the journal. Professor Andrew Boyd, from McGill University, Canada and Professor Amir Mirmiran from Florida International University, USA who served as North American Regional Editors for the past four years, are also retiring.

Crack propagation & crack length?

Hi all, I am new here and I have a question.  I have this hydroxyapatite material which is 60% porous and it is very brittle.  I got the material cut already and i was wondering when using SEM, is it possible to use the SEM to measure the crack length?  I am just wondering as to what the use of SEM is besides studying the pore size and to see if any cracks appear before and after cutting the material.  Is it still possible to find the crack propagation even though loading tests were not carried out on the material?  Can you suggest any readi

Subscribe to RSS - ceramics

Recent comments

More comments

Syndicate

Subscribe to Syndicate