检索结果-南通市图书馆

Effect of p.ep.r.tion Methods on mechanical p.op.r.ies of p.A/HA Comp.site Hydr.gel

Jour.al of Bionic engineering 2010年第3期7卷 235-243页

作者： dekun zhang~1, junjie duan~1, Dagang Wang~2. Shir.ng Ge~2.1. {2. of Mater.als Science and engineering, china university of mining and technology xuzhou 2.1116, p. r. china 2. school of mechanical and electrical engineering, china university of mining and technology, xuzhou 2.1116, p. r. china [a] school of Mater.als Science engineering China University of Mining technology Xuzhou 221116 P. R. China [b] School of Mechanical electrical engineering China University of Mining technology Xuzhou 221116 P. R. China

p.ly(vinyl alcohol) (p.A)/hydr.xyap.tite (HA) comp.site hydr.gel sp.cimens wer. p.ep.r.d with 15% p.A and 1%,2., 3%, 4% and 5% HA by r.p.ated fr.ezing-thawing. The tests of static and dynamic mechanical p.op.r.ies wer. car.ied out todiscuss the influence of differ.nt contents of HA and fr.ezing-thawing cycles on the mechanical p.op.r.ies of p.A/HA comp.sitehydr.gel. The r.sults of static mechanical tests showed that the p.A/HA comp.site hydr.gel with 3% HA and ninefr.ezing-thawing cycles had excellent str.ss r.laxation p.op.r.ies, higher.r.laxation r.tio, lower.str.ss equilibr.um value andp.esented better.p.op.r.ies of cr.ep.and r.cover.. The r.sults of dynamic mechanical test showed that the p.A/HA comp.sitehydr.gel with nine fr.ezing-thawing cycles had higher.stor.ge modulus and loss modulus, so was the p.A/HA comp.sitehydr.gel with 3% HA.

关键词： comp.site hydr.gel HA contents fr.ezing-thawing cycles static p.op.r.ies dynamic p.op.r.ies

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

r.sear.h on the Inter.titial Fluid Load Sup.or. Char.cter.stics and Star.-Up. Fr.ction Mechanisms of p.A-HA-Silk Comp.site Hydr.gel

引用

Jour.al of Bionic engineering 2014年第3期11卷 378-388页

作者： Kai Chen dekun zhang Zuming Dai Songquan Wang Shir.ng Ge school of mechanical and {2. engineering China University of Mining and Technology Xuzhou 221116 P. R. China school of Mater.als Science and engineering China University of Mining and Technology Xuzhou 221116 P. R. China

Hydr.gel has been extensively studied as an ar.icular.car.ilage r.p.ir.and r.p.acement mater.al. p.A-HA-Silk comp.site hydr.gel was p.ep.r.d by fr.ezing-thawing method in this p.p.r. mechanical p.op.r.ies wer. deter.ined by exp.r.ments and the fr.ction coefficient of p.A-HA-Silk comp.site hydr.gel against steel ball was ver.fied using micr.-tr.bometer. Finite Element Method （FEM） was used to study the lubr.cation mechanism of p.A-HA-Silk comp.site hydr.gel and the r.lation between the inter.titial fluid load sup.or. and the star.-up.fr.ction r.sistance. The r.sults show that the elastic modulus and the p.r.eability ar. 2.07 Mp. and 10^-15m^4N^-1s^-1, r.sp.ctively, and the star.-up.fr.ction coefficients of p.A-HA-Silk comp.site hydr.gel ar. in the r.nge of 0.154）.2.at differ.nt contact loads, contact time and sliding sp.eds. The star.-up.fr.ction r.sistance of p.A-HA-Silk comp.site hydr.gel incr.ases with the contact load and contact time. With the incr.ase in sliding sp.ed, the star.-up.fr.ction r.sistance of p.A-HA-Silk comp.site hydr.gel decr.ases. Ther. is an inver.e r.lation between the star.-up.fr.ction r.sistance and the inter.titial fluid load sup.or.. The change of fluid flow with the incr.ase in sliding disp.acement has an imp.r.ant effect on the inter.titial fluid load sup.or. and fr.ction r.sistance. The inter.titial fluid load sup.or. decr.ases with the incr.ase in contact load and contact time, while the inter.titial fluid load sup.or. r.infor.es with the incr.ase in sliding sp.ed. Mor.over. p.A-HA-Silk comp.site hydr.gel has mechanical p.op.r.ies of r.cover. and self-lubr.cating.

关键词： p.A-HA-Silk comp.site hydr.gel fr.ction FEM the inter.titial fluid load sup.or. lubr.cation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Synthesis and Char.cter.zation of p.A-HA-Silk Comp.site Hydr.gel by Or.hogonal Exp.r.ment

引用

Jour.al of Bionic engineering 2012年第2期9卷 234-242页

作者： dekun zhang Kai Chen Lin Wu Dagang Wang Shir.ng Ge school of Mater.als Science and engineering China University of Mining and Technology Xuzhou 221116 P. R. China school of mechanical and {2. engineering China University of Mining and Technology Xuzhou 221116 P. R. China

p.A-HA-Silk comp.site hydr.gel was synthesized with p.lyvinyl alcohol （p.A）, nano-hydr.xyap.tite （HA） and natur.l silk by using the method of r.p.ated fr.ezing and thawing. A ser.es of tests wer. p.r.or.ed to study water.content, str.ss r.laxation behavior. elastic modulus, and cr.ep.char.cter.stics of p.A-HA-Silk comp.site hydr.gel. Or.hogonal exp.r.mental design method was used to analyze the influence degr.e of p.A, HA and silk （thr.e kinds of r.w mater.als） on mechanical p.op.r.ies and water.content of the p.A-HA-Silk comp.site hydr.gel to select the best mater.al r.tio accor.ing to their.over.ll p.r.or.ance. The r.sults demonstr.te that the mass p.r.entage of p.A has the gr.atest imp.ct on the water.content, followed by HA and silk. Comp.ession str.ss-str.in var.ation of p.A-HA-Silk comp.site hydr.gel p.esents a nonlinear.r.lationship. which p.oves that it is a typ.cal viscoelastic mater.al. Comp.r.ng the mechanical p.op.r.ies of 16 for.ulas, the for.ula of p.A-HA-silk comp.site hydr.gel with mass p.r.entage of p.A 15%, HA 2.0% and silk 1.0% is the best.

关键词： p.lyvinyl alcohol hydr.xyap.tite comp.site hydr.gel or.hogonal exp.r.ment

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

球形分流对等通道转角挤压工业纯铝组织性能的影响

引用

材料科学与工艺 2020年第6期28卷 43-48页

作者：张翔王晓溪张德坤曹秉宇周怡中国矿业大学机电工程学院江苏徐州221116 徐州工程学院机电工程学院江苏徐州221018 高端工程机械智能制造国家重点实验室江苏徐州221004

基于传统等通道转角挤压(Equal Channel Angular.Extr.sion, ECAE)的变形原理,开发设计出一种具有球形空腔结构的新型复合大塑性变形工艺--等通道球形转角挤压(Equal Channel Angular.Extr.sion with Sp.er.cal Cavity, ECAE-SC)。以ECAE工艺为对比参照,开展了室温条件下工业纯铝单道次ECAE-SC挤压实验研究,进行了金相显微分析、显微硬度测试和球-面接触往复式摩擦磨损试验,获得了变形材料的显微组织、显微硬度、摩擦系数、磨损率和三维磨损形貌等特征参数.研究表明:ECAE-SC球形转角的圆滑过渡可大幅提高模具外角处金属的流动性,有效避免产生传统ECAE单道次变形"死区",挤出试样头部翘曲现象得到显著改善;室温单道次ECAE-SC变形后,工业纯铝晶粒细化明显,显微硬度值由初始36.6HV增加至58.7HV,比同条件下ECAE变形试样(52.8HV)提高了11.2.;ECAE-SC变形材料耐磨性能最好,并表现出良好的摩擦磨损稳定性,磨损机制从磨粒磨损和氧化剥层磨损为主导的混合磨损机制转变为以磨粒磨损为主导的磨损机制。

关键词：剧烈塑性变形等通道球形转角挤压工业纯铝显微硬度耐磨性能

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：