How to understand 'climb and glide occur as a parallel which leads to the creep strain having a hyperbolic sine dependence on the applied stress'?

Dear researchers: I have difficulty in understand a technical phrase written in (Perrin and Hayhurst, 1996) Creep constitutive equations for a 0.5Cr0.5Mo0.25V ferritic steel in the temperature...

01 February 2015 871 12 View

Using the existing data for analyse from the published papers, do I need to obtain the authors' or publishers permission?

I am doing a project which is based on the analysis on the existing data from the published papers in science direct, but I am not using the original figure in the publication, I am collect the...

31 December 2014 4,645 0 View

How to understand this sentence written in Fracture at high temperatures by Riedel? about creep cavity shape?

'One of the reasons that cavity nucleation occurs at distinct nucleation sites in the grain boundaries, rather than homogenously in the crystal lattice, is that the specific cavity shape may...

31 December 2014 1,446 5 View

What is the difference among TEM, X ray and SEM when the research is trying to determine micro-structure?

31 December 2014 4,631 26 View

Does any research use plotdigitizer (a software) to obtain the existing published data for analysis and is this a proper method for research?

The methodology for my PhD project is based on data collected from the existing published paper, such as journal(figures), thesis and articles et al.. I was wondering if any researcher knows is...

31 December 2014 3,901 9 View

What does creep ductility really mean? For tension specimen(uni-axial) and notched bar(multi-axial) case?

Does anyone could help me with the definition and understanding about the creep ductility in uni-axial stress states and multi-axial stress states? Any help is appreciate!

09 October 2014 653 6 View

How could I know that I can pass the PhD viva and my research contribution are enough for a PhD degree?

05 June 2014 7,174 1 View

Does anyone know what methodology can be used to develop the creep damage constitutive equations?

Any suggestion is helpful!

31 December 2013 6,490 4 View

How do I obtain parameters for a new set of constitutive equations?

My project is to develop a new set of constitutive equations. However, I have no idea how to obtain the parameter for those functions.

31 December 2013 2,705 4 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

12% ledeburitic cold work tool steel, etched for revealing retained austenite, any help for clarifying?

Hello everyone. Given microstructure image belongs to a 12% ledeburitic cold work tool steel (annealed and tempered). The sample was etched with picral (100 mL ethanol and 4 g picric acid). I...

02 March 2021 4,119 3 View

What is the characteristic length to determine the Reynolds number for the scattered turbulent fluid flow?

Dear all, I just saw this example in FB on the difference between laminar flow and turbulent flow. The flow from a pipe hits the sink and scattered. The flow from the pipe is characterized as...

02 March 2021 1,999 5 View

Why Austenite grains in steel show much more twinning than ferrite grains?

It is oftentimes said to be a distinctive metallographic trait that differentiates a fully austenitic and a fully felly ferritic steel without etching that might distinguish between two. Why...

02 March 2021 728 2 View

How can we obtain a modification factor for creep parameters?

I want to obtain standard creep parameters of salt rock by creep parameters of rectangular samples. Is there a modification factor to convert creep parameters of rectangular (prismatic) rock salt...

01 March 2021 7,131 1 View

Which cell line should we use to perform biological dosimetry experiments?

We are preparing some experiments based on irradiating cells under different conditions in order to evaluate the effects in terms of DNA damage, genetic expression, etc. As our project is...

01 March 2021 3,355 3 View

Is there a deep reason for using the squared modulus of the wave function as the probability density of the existence of the particle?

I think we were all surprised at the first time we got to know quantum mechanics that the squared modulus of the wave function is the probability density of the existence of the particle? The role...

28 February 2021 6,282 9 View

For modelling epoxy-based matrices (in composites), which model in ABAQUS is the most suitable, Concrete damaged plasticity or Drucker-Prager model?

I am working on developing a micromechanical FE model for predicting kink-band formation in UD composites. To model matrix plasticity, which model, out of Concrete Damaged Plasticity and...

28 February 2021 5,415 1 View

B-mercaptoethanol (BME) protocol?

Hi everybody, I have been running a multiplex IHC which allow me to stain the same tissue with different markers (Primary Ab + Secondary conjugated Ab) (AF487, AF555, AF647). Since I would like to...

27 February 2021 5,028 2 View