Hello everyone,

I am trying to do a 1D heat transfer analysis of a rod with triangular flux along its length. The problem is taken from  Daryl L. Logan - A First Course in the Finite Element Method (Please refer to the attachment).

I have taken the DC1D2 type of element in my analysis and applied the surface heat flux as asked in the question.

But after submitting the job I got the following error messages in the console:

Error in job 13_3logan: NO SURFACE FACETS ARE GENERATED FOR SURFACE ASSEMBLY_SURF-1.
Error in job 13_3logan: NO SURFACE FACETS ARE GENERATED FOR SURFACE ASSEMBLY_SURF-2.
Error in job 13_3logan: INVALID FLUX/FILM/RADIATION TYPE ON ELEMENT  1 INSTANCE PART-1-1. LOAD TYPE SPOS IS NOT VALID FOR ELEMENT TYPE DC1D2
Error in job 13_3logan: INVALID FLUX/FILM/RADIATION TYPE ON ELEMENT  2 INSTANCE PART-1-1. LOAD TYPE SPOS IS NOT VALID FOR ELEMENT TYPE DC1D2

As I am new to Abaqus so I am unable to understand where I have gone wrong. So could anyone help me in rectifying my error?

Thank you in advance for your kind reply!