How to determine the delamination critical stress in sandwich panel with laminates skins upper and bottom?

I study the delamination of laminates upper and bottom skins of honeycomb composite structure simple supported from two sides and under bending stress. I consider the developed tension on the...

01 February 2019 4,107 2 View

What are the best mesh quality criterion for inspection element quality?

I know about mesh density, skewness, wrap angles, and aspect ratio. Per literature, aspect ratio is a quick tool to define quality of mesh. Is there a rule of thumb for acceptable values of...

01 February 2019 2,459 5 View

What is impact of elements overlapping on the accuracy of solutions?

In FE some elements are overlapping. I read a paper says thst such overlapping causes higher in plane stiffness only. I wonder does the impact on accuracy of solutions very big?

01 February 2019 9,872 7 View

What are the important features in acoustics emission signals?

I do some experiments in using AE method to detect events. I can plot a lot of figures such as hits, signal strength, waveform, counts, events so on. Which data shall I concentrate on? A little...

31 December 2018 6,615 10 View

How can I start implementing method of moving asymptotes?

I'm a little bit confused in regard of implementing MMA method. Should I transform the objective function into a Taylor series in order to use this method? Most of tutorials explain the...

31 December 2018 7,873 4 View

How can I get rid of elements overlapping in a knot for a finite element model??

I have developed a honeycomb sandwiched structure in Salome platform, meshed with netgen 2D, then calculated the compression stresses on it using Calculix open source FE. I tried to optimise the...

11 December 2018 921 1 View

What are the main considerations in injection mold designing and calculations?

I'd like to know the main parameters that should be considered in designing of injection mold. Also, I need to know a source for standardized calculations.

01 February 2018 616 4 View

How can I start learning Calculix coding?

05 June 2017 7,774 2 View

What are the sources of error in using an APDL Ansys code on two different versions with two nonsense solutions?

We have a code for a benchmark problem. We used this code in Ansys 14 and in Ansys 17. However, we get two different nonsense solutions. Further, we repeated running the code on Ansys 14 and it...

03 April 2017 1,547 3 View

Can we consider a honeycomb reinforcement as a periodic structure?

01 February 2017 4,165 3 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 View

Hello fellow researcher .. What is the meaning of your name?

I would like to create a small guide containing the meanings of the names .. Thanks to everyone who cooperates with me in achieving it.

03 March 2021 5,266 4 View

Polymer composites suddenly solidifies?

I am making polymer composite by solvent mixing method. When I am trying to add filler solution in polymer solution it quickly get solidified. How to make them then uinform? It doesn't give time...

03 March 2021 7,540 4 View

Does the pressure(-600 mmHg) affects pH?

When I conducted the degassing experiment using decompression under anaerobic condition(and I used ferrous based chelating agent), the oxidized ferric were observerd. So, could you tell me the...

03 March 2021 4,892 5 View

Why can't make aluminum nitride film successfully by use sputter?

We use reactive sputtering process to make aluminum nitride film, and want to make c-axis aluminum nitride film on a silicon substrate, but the crystal orientation cannot be seen with...

03 March 2021 7,975 3 View