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Secret of high strength and toughness of abalone seashell

Submitted by coolbarhate on
research
bioinspired composite materials

Among all inspiring bio-material, Abalone seashell has its unique characteristics of high strength and toughness. Though , there is the general trend in materials that some of the toughness have been compromised for the sake of increasing hardness and vice versa. This astonishing property of sea shell attracts material scientists to understand the root cause for this property. One of such enthusiast, Prof. Kalpana Katti at North Dakota State University unlocked these secret of these phenomenon lies in its microstructure.

subroutine uthick

Submitted by mina rakhshi on

Hello every body,

I want to model a shell that has variable thickness, I should use from subroutine uthick in apdl ansys and studied manual ansys but it is very stunner, I don't know that how should use it, please help me.

my model is attached bellow:

Regards

Mina.

An online tool for determining the optimal Elastic Modulus (indentation)

Submitted by sobh on

We (the NanoBIO Node at Illinois ) have a new release of our nano indentation simulation tool.

This new release allows users to determine the best Elastic Modulus for a given: 

  1. Force Deflection Curve
  2. Indenter Diameter
  3. Sample Radius and height
  4. Boundary Conditions

 The tool is FREE and future extensions/capabilities will be based on your feedback. 

Postdoctoral Position in Hydraulic Fracture Mechanics Available at Masdar Institute in Abu Dhabi

Submitted by Rashid K. Abu Al-Rub on
job
fracture mechanics
damage mechanics
geomechanics
rock mechanics
oil and gas

Postdoctoral Research Fellow position in hydro-fracturing (fracking) is
available immediately at Masdar Institute of Science and Technology in Abu
Dhabi in United Arab Emirates. Masdar Institute is established in collaboration
with Massachusetts Institute of Technology. The research project focuses on
using advanced computational fracture and damage mechanics for simulating
hydro-fracturing of rocks in hydrocarbon fields. The candidate is expected to
have a PhD in the field of geomechanics, or civil engineering with solid

Harnessing viscoelasticity and instabilities for tuning wavy patterns in soft layered composites

Submitted by Stephan Rudykh on
research
wrinkling
instabilities

V. Slesarenko and S. Rudykh, Harnessing viscoelasticity and instabilities for tuning wavy patterns in soft layered composites. Soft Matter (2016)  DOI: 10.1039/C5SM02949J

 

Mechanical, microstructural and fracture properties of dissimilar welds produced by friction stir welding of AZ31B and Al6061

Submitted by a.dorbane on
research
Friction stir welding
Dissimilar metal joining
Tensile properties
High-temperature properties
microstructure

Friction stir welding (FSW) has been used for joining AZ31B magnesium alloy and Al 6061-T6 aluminum alloy sheets. In this regard, the current work aims to study the mechanical, microstructural and fracture properties of dissimilar FSW welds obtained by evolving the tool rotation and translation speeds. The dissimilar welds microstructure and mechanical properties are evaluated and correlated with the FSW parameters to obtain the optimum weld conditions. The results showed that placing aluminum on the advancing side of the weld resulted in better quality welds.

Microstructural observations and tensile fracture behavior of FSW twin roll cast AZ31 Mg sheets

Submitted by a.dorbane on
research
Friction stir welding
Microstructure characterization
Mechanical response
Micro-hardness
Texture; Failure

Defect-free joints were friction stir welded (FSW) from AZ31 Mg alloy sheets by employing optimum welding parameters for the tool geometry used. Microstructure, texture and mechanical response of the welded joints were studied to identify susceptibility of crack initiation in the different weld zones and to understand the overall fracture behavior of these welds.

Observations of the mechanical response and evolution of damage of AA 6061-T6 under different strain rates and temperatures

Submitted by a.dorbane on
research
AA 6061-T6
Strain rate effect
Temperature effect
Deformation mechanisms
Damage mechanisms
Failure mechanisms

Investigated in this paper is the mechanical and microstructural response of specimens cut from rolled AA 6061-T6 alloy subjected to uniaxial loading at different temperatures (25, 100, 200, and 300 °C) and strain rates (10–4, 10−3, 10−2, 10−1 s−1). It was found that the material exhibits a strain rate and temperature dependent behavior. Microstructure observations reveal grains elongated in the loading direction with the average grain size being independent of loading conditions.

Facebook web-page of MUSAM online

Submitted by marco.paggi on
research

Dear Colleagues,

for those of you interested in being continuously updated on the activities of the Research Unit MUSAM on Multi-scale Analysis of Materials at the IMT School for Advanced Studies Lucca, research publications and open positions, please visit and join with your 'like' the new Facebook web page of MUSAM :

https://m.facebook.com/fanpagemusam

Thank you and best regards,

Marco Paggi 

Research Unit Director 

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