Finite element analysis of dynamic knitting process on flat knitting machine based on ABAQUS

SHEN Wei-ping， HU Xu-dong， ZHANG Hua
（College of Machinery and Automatic Control， Zhejiang Sci-Tech University， Hangzhou 310018， China）

Abstract： Aiming at the problem that the guide needle's motion law and the maximum stress position are not clear in the knitting process of the flat knitting machine，the ABAQUS/CAE was utilized to establish the finite element model of the knitting mechanism of the flat knitting machine. The needle's curves of the displacement，velocity and acceleration in process of knitting were gotten by simulating the dynamic knitting process of the flat knitting machine via the ABAQUS/Explicit solver. Through the analysis of these curves，the key points of the contacts and impacts between knitting needle or guide needle and cam were found. Then the stress cloud charts of the key points of the guide needle were obtained. The simulation results indicate that the maximum stress position of the guide needle is at the location of the guide needle and the triangular which contact in process of knitting and the maximum stress is 857.1 MPa. The results provide a theoretical basis for the further analysis and optimization of the knitting mechanism of flat knitting machine.
Key words： finite element； flat knitting machine； ABAQUS； guide needle