Experimental Study of Reciprocating Friction between Rape Stalk and Bionic Nonsmooth Surface Units

Background. China is the largest producer of rape oilseed in the world; however, the mechanization level of rape harvest is relatively low, because rape materials easily adhere to the cleaning screens of combine harvesters, resulting in significant cleaning losses. Previous studies have shown that b...

Full description

Saved in:
Bibliographic Details
Main Authors: Zheng Ma, Yaoming Li, Lizhang Xu
Format: Article
Language:English
Published: Wiley 2015-01-01
Series:Applied Bionics and Biomechanics
Online Access:http://dx.doi.org/10.1155/2015/627960
Tags: Add Tag
No Tags, Be the first to tag this record!
_version_ 1832560166066716672
author Zheng Ma
Yaoming Li
Lizhang Xu
author_facet Zheng Ma
Yaoming Li
Lizhang Xu
author_sort Zheng Ma
collection DOAJ
description Background. China is the largest producer of rape oilseed in the world; however, the mechanization level of rape harvest is relatively low, because rape materials easily adhere to the cleaning screens of combine harvesters, resulting in significant cleaning losses. Previous studies have shown that bionic nonsmooth surface cleaning screens restrain the adhesion of rape materials, but the underlying mechanisms remain unclear. Objective. The reciprocating friction between rape stalk and bionic nonsmooth metal surface was examined. Methods. The short-time Fourier transform method was used to discriminate the stable phase of friction signals and the stick-lag distance was defined to analyze the stable reciprocating friction in a phase diagram. Results. The reciprocating friction between rape stalk and metal surface is a typical stick-slip friction, and the bionic nonsmooth metal surfaces with concave or convex units reduced friction force with increasing reciprocating frequency. The results also showed that the stick-lag distance of convex surface increased with reciprocating frequency, which indicated that convex surface reduces friction force more efficiently. Conclusions. We suggest that bionic nonsmooth surface cleaning screens, especially with convex units, restrain the adhesion of rape materials more efficiently compared to the smooth surface cleaning screens.
format Article
id doaj-art-24b9ec39a07241c1a96a2784dd12b2ed
institution Kabale University
issn 1176-2322
1754-2103
language English
publishDate 2015-01-01
publisher Wiley
record_format Article
series Applied Bionics and Biomechanics
spelling doaj-art-24b9ec39a07241c1a96a2784dd12b2ed2025-02-03T01:28:15ZengWileyApplied Bionics and Biomechanics1176-23221754-21032015-01-01201510.1155/2015/627960627960Experimental Study of Reciprocating Friction between Rape Stalk and Bionic Nonsmooth Surface UnitsZheng Ma0Yaoming Li1Lizhang Xu2Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education and Jiangsu Province, Jiangsu University, Zhenjiang, Jiangsu 212013, ChinaKey Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education and Jiangsu Province, Jiangsu University, Zhenjiang, Jiangsu 212013, ChinaKey Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education and Jiangsu Province, Jiangsu University, Zhenjiang, Jiangsu 212013, ChinaBackground. China is the largest producer of rape oilseed in the world; however, the mechanization level of rape harvest is relatively low, because rape materials easily adhere to the cleaning screens of combine harvesters, resulting in significant cleaning losses. Previous studies have shown that bionic nonsmooth surface cleaning screens restrain the adhesion of rape materials, but the underlying mechanisms remain unclear. Objective. The reciprocating friction between rape stalk and bionic nonsmooth metal surface was examined. Methods. The short-time Fourier transform method was used to discriminate the stable phase of friction signals and the stick-lag distance was defined to analyze the stable reciprocating friction in a phase diagram. Results. The reciprocating friction between rape stalk and metal surface is a typical stick-slip friction, and the bionic nonsmooth metal surfaces with concave or convex units reduced friction force with increasing reciprocating frequency. The results also showed that the stick-lag distance of convex surface increased with reciprocating frequency, which indicated that convex surface reduces friction force more efficiently. Conclusions. We suggest that bionic nonsmooth surface cleaning screens, especially with convex units, restrain the adhesion of rape materials more efficiently compared to the smooth surface cleaning screens.http://dx.doi.org/10.1155/2015/627960
spellingShingle Zheng Ma
Yaoming Li
Lizhang Xu
Experimental Study of Reciprocating Friction between Rape Stalk and Bionic Nonsmooth Surface Units
Applied Bionics and Biomechanics
title Experimental Study of Reciprocating Friction between Rape Stalk and Bionic Nonsmooth Surface Units
title_full Experimental Study of Reciprocating Friction between Rape Stalk and Bionic Nonsmooth Surface Units
title_fullStr Experimental Study of Reciprocating Friction between Rape Stalk and Bionic Nonsmooth Surface Units
title_full_unstemmed Experimental Study of Reciprocating Friction between Rape Stalk and Bionic Nonsmooth Surface Units
title_short Experimental Study of Reciprocating Friction between Rape Stalk and Bionic Nonsmooth Surface Units
title_sort experimental study of reciprocating friction between rape stalk and bionic nonsmooth surface units
url http://dx.doi.org/10.1155/2015/627960
work_keys_str_mv AT zhengma experimentalstudyofreciprocatingfrictionbetweenrapestalkandbionicnonsmoothsurfaceunits
AT yaomingli experimentalstudyofreciprocatingfrictionbetweenrapestalkandbionicnonsmoothsurfaceunits
AT lizhangxu experimentalstudyofreciprocatingfrictionbetweenrapestalkandbionicnonsmoothsurfaceunits