Shuai Lv, Yizhi Chang, Hui Gou

College of Mechanical and Power Engineering, Dalian Ocean University

Abstract：

The physical and mechanical properties of mottled purslane have a major influence on the cutting and breaking condition of purslane during the harvesting process. To reduce the simulation system error caused by inaccurate parameterisation of the purslane during simulation analysis, this paper completes the calibration of the finite element parameters of the mottled purslane leaves based on the experimental and simulation determination of the maximum tensile and shear breaking strengths of the mottled purslane leaves. The experimental results show that the maximum shear stress of leaf fracture is much greater than the tensile stress, and the leaf is more easily tensile fractured under the same stress condition. When the contact keyword is erosion contact, Poisson's ratio is 0.36, and the friction coefficient is 0.51, the errors of measured and simulated shear force and tensile force are 8.63% and 7.14% respectively, the error of shear stress was 5.81% and the error of tensile stress was 9.17%. This shows that the seaweed simulation model has high usability and provides a model reference base for subsequent simulation optimisation of seaweed harvesting equipment.

Key Words：

striped zebra mussels; rigid-flexible coupling; biomechanical properties; finite element method; calibrated