Need solution of coupled ordinary differential equation

[Torsten]

The ODE integrator is never called.

For i=1, you set sigmadotprev(i)=0 and you want to call ODE15I only if sigmadotprev(i)>0

(

if siprev(i)>=sicrs && siprev(i)<=sicrf && Tprev(i)<=Mf && sigmadotprev(i)>0

...

else

end

)

[nisha bhatt]

yeah I did a typing mistake ... it is 10. Even when it is 10, its giving errors

[Torsten]

You did not assign values to all the global variables you use in "martensiteMsigma". That's why res(1) is empty.

[nisha bhatt]

yeah ...thank you its resolved now..

Answer 1

[nisha bhatt]

And in this system i have not written dzdt equations because for the next iteration, its value depends on solution of ode15i. I tried to run it for first iteration but the above mentioned error keeps coming.