Qihua Xu

10 Questions 7 Answers 0 Followers

Questions related from Qihua Xu

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...

02 February 2015 920 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...

01 January 2015 4,697 0 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...

01 January 2015 3,951 9 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...

01 January 2015 1,494 5 View

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

Material science; micro-structure observation;

01 January 2015 4,686 26 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!

10 October 2014 727 6 View

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

My research is to develop a new set of creep damage constitutive equations, which is based on the analysis on other researcher’s experimental data and observations. We do not have experiments....

06 June 2014 7,223 1 View

What is the difference between unconstrained diffusion and constrained diffusion for creep damage deformation mechanism consideration?

04 April 2014 7,031 1 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.

01 January 2014 2,786 4 View

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

Any suggestion is helpful!

01 January 2014 6,541 4 View