Three-dimension numerical simulation for vulcanization process based on unstructured tetrahedron mesh

•In the study, the CV/FEM is used to simulate vulcanization process of rubber.•Unstructured four-node tetrahedron mesh is considered for fitting all parts.•Considering the result of simulation, the process can be improved and optimized.

Numerical simulation of vulcanization process is very important for producing of rubber part. In the paper, the control equations are discretized in the control volume according to divergence theorem. In order to expand the use of numerical simulation, four-node unstructured tetrahedron element is applied for various parts. Finally, a case on known data is used to test and verify effectiveness of simulation. The validity of our method is established in the case where flexible meshes are used. The results show when the number of element and node is less, the numerical procedure using our method, tested on known data, provides numerically valid and reasonably accurate predictions.