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@miguelmaso
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  • Added eight-chain model from Arruda & Boyce 1993
  • Changed VolumetricEnergy from Mechano to Elasto
  • Added elastic models composition (+)

Note: it makes no sense to add a test for the eight-chain model because its derivatives are numerical.

@miguelmaso miguelmaso self-assigned this Sep 16, 2025
@jmartfrut
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Description

  • Added eight-chain model from Arruda & Boyce 1993
  • Changed VolumetricEnergy from Mechano to Elasto
  • Added elastic models composition (+)

Note: it makes no sense to add a test for the eight-chain model because its derivatives are numerical.

We can implement analytic derivatives before merging

@miguelmaso
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Description

  • Added eight-chain model from Arruda & Boyce 1993
  • Changed VolumetricEnergy from Mechano to Elasto
  • Added elastic models composition (+)

Note: it makes no sense to add a test for the eight-chain model because its derivatives are numerical.

We can implement analytic derivatives before merging

I haven't planned implementing the analytical derivatives. My intention is to set up a benchmark where efficiency is secondary.

Aside from this, finding the analytical derivatives would imply a big effort. Perhaps, the easiest way is to find some Taylor series using AD.

@jmartfrut jmartfrut merged commit a15edf1 into main Sep 17, 2025
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@miguelmaso miguelmaso deleted the mmaso/eight-chain branch September 17, 2025 13:04
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3 participants