Questions tagged [mechanical-properties]
Questions relating to simulating the mechanical properties of materials.
11
questions
3
votes
0answers
33 views
How to judge the character and sign of a dislocation?
I do understand that $ \mathbf b||\mathbf t$ for screw dislocation but I am unable to judge the sign of the dislocation. Again if $\mathbf b \perp \mathbf t$ how do I judge its sign? Any formula which ...
7
votes
1answer
54 views
Where is this extra plane coming from?
Why are there solid lines drawn connecting the solid circles after twinning has taken place? Ideally, that explains a real plane, isn't it? But why are we going to get a plane out of nothing if we ...
5
votes
1answer
94 views
Why does twinning take place in high rate of shock loading and low temperature?
To quote from a good textbook, which I don't remember:
"Twins which are produced by mechanical deformation are called mechanical twins. Mechanical twins are produced in bcc or hcp metals under ...
5
votes
1answer
43 views
elastic constants transformation/basis change P21/a -> P21/n
I just calculated the stiffness tensor for a given material (a monoclinic molecular crystal)
using molecular simulation. When trying to compare my results to published experimental results
I found ...
6
votes
0answers
33 views
What is strain/loading rate dependence/sensitivity of compressive strength of brittle materials?
What is the definition of strain/loading rate dependence/sensitivity of compressive strength of brittle materials? Is it general strain/loading or it is specific for the brittle materials?
4
votes
0answers
29 views
What types of materials can be tested in a split Hopkinson pressure bar?
A split Hopkinson pressure bar can test different types of specimens, I would like to know what types of materials that are suitable to be tested with this method?
8
votes
1answer
54 views
What are the possible applications of DIC (digital image correlation) in mechanical testing and the field of materials science?
I would like to know about possible applications of DIC in mechanical testing and the field of materials
science, when I search there is the general topics of DIC usages, but I would like to know ...
4
votes
0answers
47 views
Are there other kinds of stability of materials? How to demonstrate that with computation approaches?
I have known some kinds of stability of materials, such as:
Mechanical stability;
Dynamical stability;
Thermal stability
In particular, they can be studied with first-principles computational ...
8
votes
0answers
65 views
How can we make a mechanically unstable cubic system, stable
I have to calculate the elastic constants of a Cubic system using a Density functional theory-based software. A cubic system will be mechanically stable if it satisfies the Born-stability condition (...
3
votes
0answers
114 views
How ductile is C60? [closed]
According to a web page I can no longer find, some brittle materials such as glass have a very high theoretical strength but they tend to have surface cracks which magnify tension at the tip greatly ...
17
votes
2answers
108 views
Can ab initio crystal structure methods predict the structure of cuprates from their stoichiometry and quantify the brittleness of those materials?
Current ab initio methods may not be able to predict the electronic transport properties of cuprate superconductors but can they be used to predict their crystal structure?
Furthermore those materials ...
