Requirements of developing finite element softwares?

There are many Finite Element softwares that are some commercial and some not. Many of them are open-source and some are closed-source. Abaqus, Ansys, LS-DYNA and ADINA are familiar to all...

09 October 2015 2,190 8 View

Can anyone help me with a UNDEX problem in Abaqus?

06 July 2014 6,239 1 View

What is the characteristic element length for a solid element?

I want to write a VUMAT subroutine for progressive impact damage. In a failure criterion, there is a characteristic length. How can I calculate this? A friend told me to write the element length,...

04 May 2014 6,351 7 View

What does my error in VUMAT subroutine mean?

I want to implement a VUMAT subroutine in Abaqus, but when I do it, the following error displays. Is there anyone who knows what this means? I use Abaqus 6.12-1 and visual studio 2008. I am sure...

04 May 2014 2,019 30 View

What is the difference between UDMGINI, VUMAT & VUSDFLD subroutines in Abaqus?

I want to model progressive impact damage in laminated composite, I see in papers, they usually use VUMAT subroutine, but there are other subroutines to model damage. Is there anyone who knows...

04 May 2014 2,683 2 View

How can I model damages for composite materials in Abaqus?

I don't know anything about damage theory, but I must model damages in composite materials. Do you have any tutorial, book or anything to help me?

02 March 2014 1,804 7 View

How can I simulate progressive impact damage in composite material with Abaqus?

I want to model low velocity impact damage in composite plates. I don't know anything about it. Could anyone help me? Tutorial, book or etc.

02 March 2014 573 15 View

What's the different between quasi-static and dynamic analyse?

I wanna to analyse a low velocity impact procedure on composite pressure vessel, but I don't know what analyse I should be do. Can anyone help me?

01 February 2014 6,644 23 View

What is the difference between "Analytical rigid" and "Discrete rigid" in Abaqus software?

I want to know where they are used exactly.

01 February 2014 5,715 11 View

Why is the minimum value of residual tensile strength in region II fewer than the constant value of region III?

In an impact analysis, there is a curve that shows residual tensile strength of composites that has incurred damage due to impact. You can see this curve in attachment.

01 February 2014 2,466 1 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

After a reference from Int J Body Compos Res, can any body help?

Hi, I am after the reference below, my library says it cannot obtain a copy either locally or internationally, any help appreciated! Chris Wang ZM, Heshka S, Wielopolski L, Pi-Sunyer FX, Pierson...

03 March 2021 6,193 1 View

What techniques can I use to determine the miscibility of polymer blends?

The term miscibility refers to the single-phase state in thermodynamics. I do not mean the compatibility of different components. To determine the miscibility I know several techniques such as...

03 March 2021 4,107 4 View

Arena simulation - how do i model the following model in ARENA (see description) (new to ARENA)?

Hello, I'm fairly new to ARENA and I have the following problem: I have two queues in which, in each queue, a different order type arrives (both having an arrival rate of exponential 10). Order...

02 March 2021 2,431 3 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View