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Simulation of Hail Impact Using the Smoothed Particle Hydrodynamic Method in Abaqus/Explicit

Submitted by SIMULIA on
software
ABAQUS
simulation
FEA

Ice or hail impact is an important design consideration in the aviation, energy, and astronautics industries.  Physical testing of impact scenarios can be expensive and impractical.  Numerical simulations provide cost effective and convenient tools for including hail impact scenarios in the design process.

Numerically simulating high speed ice or hail impact is challenging because of the extreme deformation, fragmentation, contact, and material model complexity.

aluminum foam modeling

Submitted by raeisi.s on
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software

Hi Every Body 

I am trying to simulate compression test for an aluminum foam.

At first,I modeled a unit cell to create my final shape by repeating method(copy cell side to side).

Then I merged these cells to reach a unified shape.

As compression test is a quasi-static process,I try to run it by a dynamic explicit in Abaqus.

But it takes too much time so that each step time is less than 10^-5 for simple model and explicit analysis may take 4-5 days 



Time step increments in ABAQUS

Submitted by s_gupta on
software
Non-Linearity
increments

HI everyone,

I am actually pretty confused about how to determine the correct time step increment in ABAQUS in a non-linear analysis. I first faced this problem when I used Hashins damage to capture in-plane shear response of the composite . The response which is bilinear graph depends a lot on the initial time step I give for the analysis i.e., for some time steps there is no bilinearity , only a single straight line. This has led to great confusion in my mind whether my model has a problem or whether ABAQUS itself has this problem.

Joint definition

Submitted by wakeful on
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I modeled a 3D truss; About joint
defining: for joints that more than 2 beams element connect in them, is this
way correct to define pin connection between them?

If there are 3 beam element: 1, 2, 3

I defined first MPC constraint (pin)>
control point: from beam 1, and slave point: from beam 2

And for second constraint>
control point: from beam 2, and slave point: from beam 3

Is this definition result mean that
beam 1 and 3 are pin at that joint?

 

   

Normal
0

Ramping initial stress in Membrane elements

Submitted by ashwin_blj on
software
ABAQUS

Hi,

I am doing an explicit analysis, i am trying to model a woven fabric structure. I have to pre-stress the fabric so i have used this option. 



*AMPLITUDE, NAME=name

*SECTION CONTROLS, RAMP INITIAL STRESS=name



Details from INP file



*Membrane Section, controls = SC, elset=FABRIC, material=FABRIC

0.5,



*AMPLITUDE, NAME = RampStress, DEFINITION = Smooth Step,time=total time

0.0, 0.0, 0.0025, 1.0, 1.0, 1.0



*SECTION CONTROLS,NAME=SC, RAMP INITIAL STRESS=RampStress

gap of von mises stress between Ansys and Abqus

Submitted by TaoLI on
software
vibrations

Hello ,

 I am doing the correlation between Ansys and Abaqud for a shroud of cooling module (solid 92-C3D10) .I find the coorelation is perfect in frequency , but when i do the powerspectral density analysis, i noticed a gap of 10-20% on the peak value of nodal von mises stress ,  i'd like to know the reason of the diffrence .

 

 

Thank You .



 

*MATRIX GENERATE - Global Stiffness matrix

Submitted by salingerv on
software
ABAQUS
Stiffness Matrix
Abaqus output

Thank you  for your reply. I know but I was wondering if it is possible to omit them manually.

 One more question, I figured that using *MATRIX GENERATE, one could get the global stiffness, mass or load matrix in a ".mtx" file. But I am wondering why I can't get the file after the run.

https://www.sharcnet.ca/Software/Abaqus610/Documentation/docs/v6.10/boo…;

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