Palm nut cracking under repeated impact load
Journal of Applied Sciences
Department of Mechanical Engineering, Obafemi Awolowo University, Ile-Ife, Nigeria
Cracking a whole palm nut under repeated impact load, with the object of minimizing kernel breakage, was modeled and tested. The models were based on the conservation of energy impacted on the nut by a failing weight, or the kinetic energy of a moving nut and the strain energy required in fracturing the nutshell. One of the two models predicts the falling height required to crack a nut, in terms of stiffness, maximum deformation and size of the nut and the load cycles. The second model predicts the hurling speed required to crack a nut, in terms of stiffness, maximum deformation, mass and size of the nut and the load cycles. Experimental verification, which is in good agreement with the theory showed significant reduction in kernel breakage when palm nuts were subjected to low but repeated impact. © 2006 Asian Network for Scientific Information.
Conservation of energy; Experimental verification; Impact; Load cycle; Palm nut; Palm nut cracking; Repeated impact; Repeated impact load; Crack initiation; Deformation; Fatigue of materials; Fracture; Kinetics; Stiffness; Cracks