Compression analysis of dehydrated agricultural products

Krokida, MK; Karathanos, VT; Maroulis, ZB

dc.contributor.author	Krokida, MK	en
dc.contributor.author	Karathanos, VT	en
dc.contributor.author	Maroulis, ZB	en
dc.date.accessioned	2014-03-01T01:15:30Z
dc.date.available	2014-03-01T01:15:30Z
dc.date.issued	2000	en
dc.identifier.issn	0737-3937	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13557
dc.subject	stress	en
dc.subject	strain	en
dc.subject	rheological behaviour	en
dc.subject	apple	en
dc.subject	banana	en
dc.subject	carrot	en
dc.subject	potato	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.other	WATER ACTIVITY	en
dc.subject.other	TEXTURE	en
dc.title	Compression analysis of dehydrated agricultural products	en
heal.type	journalArticle	en
heal.identifier.primary	10.1080/07373930008917711	en
heal.identifier.secondary	http://dx.doi.org/10.1080/07373930008917711	en
heal.language	English	en
heal.publicationDate	2000	en
heal.abstract	The textural properties of apple, banana, carrot and potato were experimentally determined by uniaxial compressive tests of cylindrical specimens at a constant deformation rate of 5mm/min. Compression tests were performed, following air drying, at various moisture contents ranging from 0.2 to 6 kg/kg db. The tests were performed using a universal texture testing machine and simple mathematical equations were used to correlate-the maximum experimental stress and the corresponding strain to the moisture content. It was shown that the maximum stress decreases as the moisture content decreases, until a critical moisture content of 1.8 kg water/kg dry solids. Further removal of water tends to increase the maximum stress. The maximum experimental strain was found to increase as water was removed. The stress-strain data of compression test were modelled using a simple mathematical model, containing parameters such as the maximum stress (sigma(max)), the maximum strain (epsilon(max)), the elastic parameter (E) and the viscoelastic exponent (p). The effect of the moisture content on the compressive behavior of dried materials was introduced through its effect on the model parameters. The shift in compression behavior at 1.8 kg water/kg solids leads to the conclusion that there is an important change of structure at this moisture content.	en
heal.publisher	MARCEL DEKKER INC	en
heal.journalName	DRYING TECHNOLOGY	en
dc.identifier.doi	10.1080/07373930008917711	en
dc.identifier.isi	ISI:000085320900023	en
dc.identifier.volume	18	en
dc.identifier.issue	1-2	en
dc.identifier.spage	395	en
dc.identifier.epage	408	en