[aspect-devel] Strain weaking - continental extension model

[Glerum, A.C. (Anne)]

Hi Phil,

Glad to hear it worked out, thanks!

Cheers,
Anne

On 19 Sep 2017, at 10:39, HERON, PHILIP J. <philip.j.heron at durham.ac.uk<mailto:philip.j.heron at durham.ac.uk>> wrote:

Hi Anne,

Thanks for the email! These are great - thank you. John Naliboff emailed me a while back - looking back over the email it looks like we had an exchange between ourselves and not the group! Thanks for the help!

It worked out well - no density inversion. I was implementing the strain weakening incorrectly.

Thanks!

Phil
________________________________
From: Aspect-devel <aspect-devel-bounces at geodynamics.org<mailto:aspect-devel-bounces at geodynamics.org>> on behalf of Glerum, A.C. (Anne) <A.C.Glerum at uu.nl<mailto:A.C.Glerum at uu.nl>>
Sent: 19 September 2017 09:29:52
To: aspect-devel at geodynamics.org<mailto:aspect-devel at geodynamics.org>
Subject: Re: [aspect-devel] Strain weaking - continental extension model

Hi Phil,

Hope this answer is not too late for your talk, but there are some tests using the strain weakening functionality of the visco plastic material model:
visco_plastic_complex.prm
visco_plastic_yield_strain_weakening.prm
visco_plastic_yield_strain_weakening_full_strain_tensor.prm
Perhaps they’re helpful? I’ve been running some extension models with strain weakening, so I’m curious to hear whether you still get your density problem.

Cheers,
Anne


On 11 Sep 2017, at 12:26, HERON, PHILIP J. <philip.j.heron at durham.ac.uk<mailto:philip.j.heron at durham.ac.uk>> wrote:

Hello there,

I've been asked to give an informal chat to some structural geologists on ASPECT usability this week, so I'm just building up some simple models.

I've been playing around with the continental extension model and am looking to add on strain weakening to the cookbook example. However, each time I've tried to implement it I get a strange density inversion in the model.

Does anyone have an example of how to implement simple strain weakening, say for this cookbook example? There are no examples kicking around that I can see.



Thanks in advance for the help!

Best,

Phil
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