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Scanning AC nanocalorimetry study of Zr/B reactive multilayers

Submitted by nanomicroscience on
research
multilayer
Vlassak group
ZrB2
scanning AC nanocalorimetry
ultra high temperature ceramic

The reaction of Zr/B multilayers with a 50 nm modulation period has been studied using scanning AC nanocalorimetry at a heating rate of approximately 1,000 K/s. We describe a data reduction algorithm to determine the rate of heat released from the multilayer. Two different exothermic peaks are identified in the nanocalorimetry signal: a shallow peak at low temperature (200 - 650°C) and a sharp peak at elevated temperature (650 - 800°C).

A brief survey on discontinous Galekin methods in computational fluid dynamics

Submitted by CSTAM_Journal on
research

As the 6th issue of Advances in Mechanics is going to publish, i post one of the review paper in this issue to share with all of you! Hope it will be helpful to you!

Journal Tittle: Advances in Mechanics

Article Tittle: A brief survey on discontinous Galerkin methods in computational fluid dynamics

Author: Chi-Wang Shu(Brown University)

Abstract:

Rotational Abaqus Direct Cyclic Boundary Condition

Submitted by paulamil on
research
ABAQUS
Direct Cyclic

Greetings,

I am attempting to model the rotation of a cylindrical bar using Abaqus 6.12 coupled with the direct cylic approach. In my model I have one end of the beam fixed while the other has a kinematic coupling constraint to a reference point that has an applied rotation of 0.1 rad.

High-temperature tensile behavior of freestanding Au thin films

Submitted by Gi-Dong Sim on
research
thin films
Grain Boundary Sliding
creep
Vlassak group
In situ tension test
High-temperature deformation

In this paper, the mechanical behavior of freestanding thin sputter-deposited films of Au is studied at temperatures up to 340°C using tensile testing. Films tested at elevated temperatures exhibit a significant decrease in flow stress and stiffness. Furthermore the flow stress decreases with decreasing film thickness, contravening the usual notion that “smaller is stronger”. This behavior is attributed mainly to diffusion-facilitated grain boundary sliding.

This paper has been accepted by Scripta Materialia.

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