Test assembly and test device for simulating annular fuel

The invention relates to the technical field of nuclear fuel tests, in particular to a test assembly and a test device for simulating annular fuel, and the test assembly comprises a shell, two end plugs and a pressurizing assembly. The shell comprises an inner wrapping shell and an outer wrapping shell which are of hollow tubular structures; the two end plugs are installed at the two ends of the shell in a sealed mode respectively so that an annular sealing cavity can be formed between the outer cladding and the inner cladding. The two end plugs are configured to be electrically connected with a direct-current power supply to supply power to the shell, so that the shell is heated to simulate the temperature change working condition of the annular fuel; and the pressurizing assembly is suitable for inflating the sealing cavity and is used for simulating the pressure intensity change working condition in the annular fuel. The test device comprises a pressure control system, a direct-current power supply and a t