Abstract
ABSTRACT In order to achieve autonomy in addressing the threats such as entanglement of derelict fishing gear (DFG), it is necessary for autonomous underwater vehicles (AUVs) to integrate a reasonable cutting mechanism.However, the interaction characteristics of flexible fishing nets and cutting tools, as well as the time-varying topology increase the complexity of the cutting process. Therefore, the cutting process of cutting flexible fishing net line is analyzed in detail in this paper.By observing the cutting force and displacement characteristics of the cutting deformation stage of the fishing net line, the fracture performance under different cutting ratios was analysed, the cutting forms that complete the cutting operation with smaller cutting forces were explored.Finally, the expressions for local stiffness and rupture cutting energy were established to quantify the difficulty of the cutting, which guided the design of a built-in cutting mechanism matching with the space size of the AUV.
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