Dear all,
I’m trying to model the effects of fire on composite materials in Abaqus using UMATHT subroutine, assuming that there
is no accumulation of decomposition gases in the solid material and all gases flow in only one direction (we will say along x axis). Thus i need to compute the mass flow of decomposition gases (mdot) which is obtained using an integral of the rate of density (drho/dt) along the spatial coordinates through the thickness :
mdot = int(drho/dt)*dx
drho/dt is calcultated by an Arrhenius's law and define as a solution-dependent state variable (STATEV(1)) in my UMATHT.
My problem is i only have access of informations at the current integration point with UMATHT. But i need to have variables at all nodes which share the same element of this current integration point in order compute the integral.
Can you give me some advices ?
Actually i am a new subroutine writter and this is my first one that i write so i do not know much about other Abaqus subroutine except UMAT.
Best regards,
khurion.
I’m trying to model the effects of fire on composite materials in Abaqus using UMATHT subroutine, assuming that there
is no accumulation of decomposition gases in the solid material and all gases flow in only one direction (we will say along x axis). Thus i need to compute the mass flow of decomposition gases (mdot) which is obtained using an integral of the rate of density (drho/dt) along the spatial coordinates through the thickness :
mdot = int(drho/dt)*dx
drho/dt is calcultated by an Arrhenius's law and define as a solution-dependent state variable (STATEV(1)) in my UMATHT.
My problem is i only have access of informations at the current integration point with UMATHT. But i need to have variables at all nodes which share the same element of this current integration point in order compute the integral.
Can you give me some advices ?
Actually i am a new subroutine writter and this is my first one that i write so i do not know much about other Abaqus subroutine except UMAT.
Best regards,
khurion.