What is the background idea, logic and understanding, while solving second order ODE using ode45 in Simulink-Matlab?

More S. Arun's questions See All

If strength increases does elongation also increase?

If I prepare a composite where the strength and elongation increases. Since the hardness increases with the increase in strength and increase in hardness led to increase in brittleness. As we see...

11 December 2014 394 8 View

Can I use brittle material theory (max principle stress theory) for selecting brittle material in FEM?

If I use von mises theory (VMT) and max principle stress theory (MPST) for the same geometry the maximum allowable stress obtained from VMT is two times of MPST. Hence if i select the brittle...

11 December 2014 9,830 6 View

How to give the external force in lagrangian dynamic equation formulation in multi body dynamics?

Since the external force depends on the generalized coordinates how to give the torque acting at different point in the system?

09 October 2014 5,363 7 View

Can I predict the Young's modulus and Flexural Modulus of the MWCNT nanocomposites using Halpin Tsai equation?

Can I predict the Young's modulus and Flexural Modulus of the MWCNT nanocomposites using Halpin Tsai equation? or using the single equation by only changing the Modulus value

09 October 2014 2,442 2 View

In Simulink matlab what are the two inputs to be given for atan2?

In Simulink matlab what are the two inputs to be given for finding atan2? My objective is to find taninverse of Y?

08 September 2014 5,044 2 View

How to measure the Young's modulus and tensile strength of MWCNTs?

How to measure the Young's modulus and tensile strength of MWCNTs? I got these values from literature however i am interested to know about the measurement technique

08 September 2014 2,721 0 View

Why does the percentage enhancement of tensile strength, young's modulus and elongation not match with each other in case of nanocomposites ?

Why the percentage enhancement of tensile strength, young's modulus and elongation doesn't match with each other in case of nanocomposites for a particular wt percentage?

07 August 2014 6,378 7 View

Why the nanoparticles are still in research and not used in different applications?

07 August 2014 8,985 0 View

What is the physical meaning and advantage of giving clock with simout(workspace) in matlab simulink?

07 August 2014 6,527 3 View

What is the difference between arctan and arctan2 in matlab simulink?

See above

07 August 2014 5,947 5 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

16 June 2021 0 0 View

fatal error

16 June 2021 0 0 View

fatal error

16 June 2021 0 0 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

How can you bring two structures together to create an adhesive bond in LAMMPS?

I have created an Ice 1h crystalline structure and an Aluminium substrate structure and equilibrated both at 250K. Now I need to bring them together in a way that an adhesive bond is created....

01 March 2021 3,325 2 View

Alfonso Bueno-Orovio

Solvers for first order ODEs, including ode45, can be easily accommodated to solve systems of ODEs. When solving a second order ODE, the equation is first transformed to a system of two first order ODEs, which is then numerically approximated by the ODE solver (ode45 in this case).

Pisupati Sadasiva Subramanyam

It is based on State variable Technique, based on the Principle that an n-th order differential equation can be represented by means of n first order differential equations in Matrix Form as used in control system.

P.S.