How to calculate the energy reflection coefficients in LAMB wave edge reflection problem?

Hello everyone, Has anyone ever succeeded in calculating the energy reflection coefficients in LAMB wave edge reflection problem? Or any available code resources? I am a third-year master...

08 December 2020 1,151 3 View

Flexural wave absorbtion in thin plate at low frequecy using PML?

Hello everyone, Recently, I am trying to simulate the flexural wave relating problems in an infinite (large enough) thin plate at low frequency using COMSOL. Frequency-domain and eigenfrequency...

18 October 2020 6,927 3 View

How to calculate the energy reflection coefficients in LAMB wave edge reflection problem?

Hello everyone, Using the spectral collocation method (SCM), I have successfully obtained the complex wavenumber k, displacement U and stress field S of different LAMB modes. However, when I...

31 August 2020 3,813 2 View

How to calculate Lamb wave dispersion curves with a complex wavenumber k?

Hello everyone! I'm trying to draw Lamb wave dispersion curves with MATLAB, and I have succeeded with calculating the results with a real wavenumber or a pure imaginary wavenumber. I'm not so...

08 August 2020 2,665 11 View

How can I calculate a frequancy domain problem with PDE in Comsol?

Hello everyone, I want to solve a elastic wave problem in Comsol using PDE module since my model have a different consititutive relation which is not included in the present modules. I have...

23 July 2020 7,337 3 View

How to process synchrotron XRD data in Jade 6?

18 May 2020 7,995 4 View

OpenSees DisplacementControl of a node that is not loaded?

I am trying to model nonlinear, cyclic behaviour of a cantilever beam, I wish to apply a cyclic load at the free end. And I want the midpoint of the beam to be displacement controlled (ie. reverse...

17 October 2019 4,895 1 View

We transfected HEK cells for a secreted protein and want to confirm the protein is expressed in right MW. Should we collect supernatant for Western?

We transfected HEK cells for a secreted protein and want to confirm the protein is expressed in right MW. Should we collect supernatant for Western? Not sure we choose the right method. We have...

14 May 2019 4,804 4 View

The 14C natural abandance keep stable in the atmosphere, so will the acceleration of soil microorganism metabolism influnce the 14C natural abandance?

The 14C natural abandance keep stable in the atmosphere, so will the acceleration of soil microorganism metabolism influnce the 14C natural abandance?

13 November 2018 876 6 View

Laue oscillations in XRD pattern of Pt film

Hi,guys, I have obtained epitaxial NiO(100) film on Pt(100)-covered MgO(100) substrate by magnetron sputtering. The attached is its 2theta-omega XRD pattern. One reviewer comments that " The peak...

26 July 2017 7,657 3 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 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

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

Blast analysis of RC,UHPC slabs using material model *MAT_72R3 in LS-DYNA?

20 February 2021 5,984 3 View

Good day sir/ma. Please, where can I have access to equipment for conducting XRF, XRD and SEM analysis?

I'm using blast furnace slag for stabilizing subgrade soil.

17 February 2021 7,333 3 View

CT image preprocessing in python?

I have a 3D CT image of a car engine in raw form with no header information. When loaded into numpy array as 16 bit unsigned integer, I noticed that the values range between 0 to 52000. Is this...

15 February 2021 4,736 3 View

Is nr blast important?

Hello, I have designed a specific primer for my Gene, when I blast this primer, it just finds the mRNA of the gene, but in nr blast, I have found some CDSs that are not relevant to my Gene. Do...

05 February 2021 5,842 3 View

Abaqus - plate is going up under gravity+blast loads?

Hi, I have modeled concrete plate with reinforcement supported on 2 concrete block. between concrete block and the plate I have added regular contact. I have created 2 steps: 1) only gravity load...

30 January 2021 2,772 1 View

For Carbon-emission free steelmaking by electrolysis with nonoxidizable electrode in EAF, what would be electrode material?

While CCS can be employed along with a conventional Carbon-efficient EAF steelmaking process (especially from iron ore) or even Hydrogen or hydrocarbon can bee passed through central electrode,...

30 January 2021 3,378 1 View

What are the thermodynamic and kinetic similarities and differences among dendrite formation during solidification of metals, ceramics and polymers?

Basic dendrite formation of metallic alloys are explained by thermal and constitutional degree of supercooling and most-supercooled band of liquid somewhat ahead of solidification front that...

30 January 2021 8,450 2 View