stress field from thermal analysis

hello,
I am facing problem to get stress results from transient thermal analysis.
If someone has command file or any information regarding it please share it.
please help me out to get stress filed.
Here is the command file for transient thermal analysis.

DEBUT();

#==============================Modelling=============================
MESH=LIRE_MAILLAGE(UNITE=20,
FORMAT='MED',);

MODEL=AFFE_MODELE(MAILLAGE=MESH,
AFFE=_F(TOUT='OUI',PHENOMENE='THERMIQUE',MODELISATION= '3D',),);

#==============================Material==============================
MATER=DEFI_MATERIAU(ELAS=_F(E=1.0,NU=0.3,RHO=2700,),
THER=_F(LAMBDA=237,RHO_CP=903),);

MATFIELD=AFFE_MATERIAU(MAILLAGE=MESH,
AFFE=_F(TOUT='OUI',MATER=MATER,),
AFFE_VARC=_F(NOM_VARC='TEMP',VALE_REF=293),);


# ==============================Boundary condition=====================
LOADING=AFFE_CHAR_THER(MODELE=MODEL,
TEMP_IMPO=(_F(GROUP_MA='inner',TEMP=373,),),
ECHANGE=(_F(GROUP_MA='outer',COEF_H=25,TEMP_EXT=293),),);

# ===========================TRANSIENT Analysis setup==================
LINST=DEFI_LIST_REEL(DEBUT=0.0,INTERVALLE=(
_F(JUSQU_A=10, NOMBRE = 20),),INFO=2,)

TEMP=THER_LINEAIRE(MODELE=MODEL,
CHAM_MATER=MATFIELD,
EXCIT=_F(CHARGE=LOADING,),
INCREMENT=_F(LIST_INST=LINST,),
ETAT_INIT=_F(VALE=293,),
PARM_THETA=0.9,);

# ============================Result==================================
IMPR_RESU(FORMAT='MED',RESU=_F(RESULTAT=TEMP,),);

FIN();

Hi,
you ca NEVER get a stress field directly from a thermal analysis!

What you need to do is a thermo-mechanical analysis by first doing the thermal, then applying the computed temperature on the mechanical model with thermal and mechanical material properties and compute the stresses from the mechanical model.

I think you should find all the information in the dedicated training material:
www.code-aster.org/V2/UPLOAD/DOC/Formations/07-thermics.pdf

Best,
Richard

Ever thought about doing some proper analysis with the help
of measuring instruments? Could be really helpful in this case.
I've used a Differential Thermal Analyzerer like this one: www.linseis.com/en/our-products/differen...analysis/dta-pt1600/ in similar cases before.

Can really help, if you're unsure about your current process.

Regards