Impact machine. Should accelerometer and load cell give same impact force value?

I am designing a helmet impact machine. Does the accelerometer placed inside helmet and load cell placed under anvil give the same peak force value?

09 October 2019 8,365 4 View

Which material property plays a significant role in impact absorption?

The material should be stiff, tough or Young modulus should be more or which property should be significant for excellent energy absorption?

09 October 2019 2,054 4 View

Time step too small error in explicit dynamics?

Can any one help with this error in ANSYS explicit dynamics? I am striking a bullet with velocity 800 m/s on a kevlar plate 1cm thick. I am calculating time by dividing 0.01 m with 800m/s.

09 October 2018 9,389 1 View

Solid layered section is not allowed in current analysis (ANSYS error)?

I am striking a bullet on a kevlar plate 1 cm thick. I have linked a plate designed in acp with explicit dynamics I have turned on the Beta options. I am facing error "solid layered section is...

09 October 2018 8,498 0 View

ANSYS Compostie Cure Simulation Tool?

I wanted to ask is ACCS (Ansys Composite Cure Simulation) tool only for curing. What if we cool the composite? Will we use the ACCS tool for cooling? Actually I cooled the composite from 120 to...

07 August 2018 8,296 1 View

Which turbulence model is best to predict reattachment length of flow over a forward facing step?

I have few questions if any one can add to it: 1. I want to run a simulation with experiments done in free surface water tunnel. Which model you think can predict good reattachment length. 2. I am...

10 November 2015 8,575 35 View

Any advice on reattachment length forward facing step?

I am trying to measure the reattachment length in Adverse pressure gradient flows over a forward facing step. Which RANS model predicts reattachment length formed at the step consistent with...

09 October 2015 1,419 7 View

What is the difference in Finite difference method, Finite volume method and Finite element method?

What is the major difference in FVM, FDM and FEM? Please explain in detail and in simple words. Which method is used in softwares like fluent?

09 October 2015 3,002 21 View

What is the difference between first order upwind schemes and second order and higher schemes?

03 April 2015 9,087 16 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

What is the most Operating System (OS) which can be INSTALL on Tiny hard devices like Raspberry Pi (RPi) hardware ?

I'm targeting to deploy a mesh network and manually configure MANET routing protocols. I'm preparing scenarios, architectures, and hard devices needed to do that. Are there some step-by-step...

03 March 2021 1,931 5 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

Why the results when using wall thickness and when using shell conduction are different in ansys fluent?

Actually, I am running cfd simulation for a heat exchanger which has two fluids one hot and other one is cold fluid. there is a solid domain between them, which I removed and instead I have used...

01 March 2021 9,537 2 View

Joint behaviour in Abaqus is not captured well?

I am working on roof joint and trying to simulate the behaviour in Abaqus. I am successful in running the model but the final graph does not follow the experimental curve in the negative direction...

01 March 2021 6,661 3 View

In Molecular Dynamics Simulation, how do I make changes to the force field according to my protein?

Hi In Molecular Dynamics Simulation, how do I make changes to the force field according to my protein? I got this error in the add-ion stage: Fatal error "./ amber99sb-ildn-HHH.ff / force...

01 March 2021 8,747 4 View