Praying mantis is one of the most efficient predators in insect world, which has a pair of powerful tools, two sharp and strong\nforelegs. Its femur and tibia are both armed with a double row of strong spines along their posterior edges which can firmly grasp\nthe prey, when the femur and tibia fold on each other in capturing. These spines are so sharp that they can easily and quickly cut\ninto the prey. The geometrical characteristic of the praying mantis�s foreleg, especially its tibia, has important reference value for the\ndesign of agricultural soil-cutting tools. Learning from the profile and arrangement of these spines, cutting blades with tooth profile\nwere designed in this work. Two different sizes of tooth structure and arrangement were utilized in the design on the cutting edge.\nA conventional smooth-edge blade was used to compare with the bionic serrate-edge blades. To compare the working efficiency\nof conventional blade and bionic blades, 3D finite element simulation analysis and experimental measurement were operated in\npresent work. Both the simulation and experimental results indicated that the bionic serrate-edge blades showed better performance\nin cutting efficiency.
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