Any advice on the Eigenvalues of stiffness matrix?

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Obtain element-wise strain energy in Comsol?

I am linking Comsol with Matlab. I can compute the strain energy density on the nodes of the finite element (Ws) and the unit is J/m^3. But I need the strain energy on each element of the finite...

31 December 2018 9,270 1 View

Derivative over double summation?

Please, can someone help me find the derivatives in this attachment? You can solve it in the attached word document. Thank you so much.

31 December 2018 1,173 0 View

Implementing signed-distance function code directly inside Comsol?

Good day, Please, I need help: I have this signed-distance function code and I need to implement it directly inside Comsol (please, note that I do not want to couple Comsol with Matlab), but I...

06 July 2018 7,032 0 View

Please, how I can set up level set in Comsol multiphysics which can be used for solving three dimensional problem?

Please, how I can set up level set in Comsol multiphysics which can be used for solving three dimensional problem? Thank you so much.

06 July 2018 603 4 View

How can I vary the topography of a model in comsol?

I have a 3D model in comsol (Please, find the attached comsol model). I want to get the x, y and z coordinates of the model. And I want to use the z coordinate as design variable. the ultimate...

09 October 2017 3,843 1 View

Implement topography optimization and bead optimization to improve structural stiffness in Comsol

Please, I need help on how to implement topography optimization and bead optimization to improve structural stiffness of engineering component in Comsol. Thank you.

07 August 2017 8,246 0 View

How can I output global displacement in Comsol?

Please, how can I output global displacement (U) in Comsol? I want to calculate the compliance of my model. (Please, see the attached Comsol code). compliance = U transpose x Global stiffness...

06 July 2017 9,695 4 View

Output area and perimeter of geometry from Comsol in Matlab workspace

I am using COMSOL Multiphysics 5.2a with MATLAB. Please find the attached MATLAB code generated from COMSOL. I already have the codes to generate the perimeter and the area of the...

06 July 2017 4,510 1 View

How can I create a geometry in Matlab and issue a command from matlab to patran to mesh it?

Please, I want to create a geometry in Matlab and issue a command from Matlab to Patran (or any other dedicated software) to mesh the geometry and return an output file which will be an input file...

04 May 2017 4,807 4 View

Output Comsol result from Matlab

Please help: I have a model in Comsol. I want to output y displacement result at some points [73 74 113 114 151 154 191 194 229 234 269] in the model. But the code is outputing the displacement in...

04 May 2017 1,808 0 View

How to define an anisotropic material with asymmetric elastic compliance/stiffness matrix in ANSYS APDL?

I need to model an anisotropic material in which the Poisson's ratio ν_12 ≠ ν_21 and so on. Therefore, the elastic compliance matrix wouldn't be a symmetric one. In ANSYS APDL, for TB,ANEL...

09 August 2024 5,048 2 View

Is it true that $\det(V(A))$ may be only $\pm 1$, depending on $n$, for the last symmetric tridiagonal matrix $A$?

One can try to generalize the Vandermonde determinant in the following direction: Let $A$ be any symmetric $n$-order square matrix. Consider its powers' diagonal elements $(A^k)_{ii}$ and...

08 August 2024 6,690 1 View

Separation of organic acids-HPLC?

Hello What should be done to separate and identify organic acids in HPC when their RetTime is the same?Like oxalic acid with Propanoic Acid.or acids that have a very close RetTime.

07 August 2024 8,782 3 View

Usage of internal standards in LC-MS/MS analysis?

Have you ever seen a LC-MS/MS method uses both internal standards and external standards (in matrix matching purpose) but the concentrations of internal standards are outside the calibration curve...

05 August 2024 3,084 6 View

Request a single Lecture notes for math as detailed as this that I can find in one place?

- The Existence/Uniqueness of Solutions to Higher Order Linear Differential Equations - Higher Order Homogenous Differential Equations - Wronskian Determinants of $n$ Functions - Wronskian...

03 August 2024 2,366 0 View

Which test should be used to study association among demographic profile and awarness level?

i have to study the awareness and adoption level of cloud computing in a district of India. i also want to use association among demographic variables like gender, age, education, income etc and...

02 August 2024 2,420 3 View

Tissue homogenization in mouse with FastPrep-24™ 5G - is the D matrix system useful?

I need to lyse and homogenise mouse tissues. So far I have experimented with liver and lung tissue, using matrix D. The liver was completely lysed with 6 repetitions of the standard program, but...

31 July 2024 9,186 0 View

Is it true that science is leaving the era of mathematics and entering the era of matrix mechanics?

We assume this to be true. Science leaves the era of mathematics and enters the era of matrix mechanics and the turning point is the discovery of numerical statistical theory called Cairo...

31 July 2024 3,900 2 View

Help on understanding the implementation of Mori Tanaka method on MATLAB?

I am new to Micromechanics and having similar problem with understanding the implementation of the formula's. I would appreciate if anyone can guide me on how to go about getting a scalar value...

30 July 2024 969 0 View

How to use Desmond in HPC ?

Our department has recently acquired an HPC (High-Performance Computing) system, and I'm thrilled to take my molecular dynamics calculations to the next level using Desmond. I used to run my...

28 July 2024 6,553 1 View