Study on themechanical and simulation of fruit shells for Camellia oleifera shelling Processing
The shift from manual to mechanized dehulling of Camellia oleifera fruits is an inevitable trend in modern processing.The mechanical and structural changes of shells under different parameters during dehulling are the basis for optimizing dehulling equipment structure and operating parameters.This article establishes an in-situ observation experimental platform to analyze Camellia oleifera fruit shells mechani-cal properties under different compression rates,shell regions,temperatures,moisture content,and deeply analyzes shells structural changes under different working conditions.By establishing a shell compression mechanical model,analyses shell damage during compression process.Results show that during compres-sion process,shell damage stages can be divided into:exocarp and mesocarp plastic deformation.As com-pression rate increases,compression peak force increases and then decreases.At compression rate 1.0 mm/s,compression peak force reaches maximum value,with abdomen(14.7 N)＞bottom(13.3 N)＞top(12.8 N).The shell sample moisture content decrease leads to an increase in the hardness of exocarp,exocarp peak force increase,and compression peak force decrease.When the temperature increases,the structure of the fruit shell changes significantly,loses water and hardens,and compression peak force rises in a parabolic shape.Finite element simulation has revealed in depth stress distribution and crack state during compres-sion process.
Shelling processingShell structureMechanical propertiesFinite element analysis
万方数据
维普
