检索结果-南通市图书馆

Chinese Journal of Aeronautics 2024年第2期37卷 511-523页

作者： yunsen hu Jingheng ZHANG Lin WANG Fei CHENG Xiaozhi hu School of Materials and Chemistry Southwest University of Science and TechnologyMianyang 621000China School of Mechanical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Engineering Research Center of Biomass Materials Ministry of EducationSouthwest University of Science and TechnologyMianyang 621010China Department of Mechanical Engineering University of Western AustraliaPerthWA 6009Australia

Adhesively Bonded Carbon Fibre Reinforced Plastic(CFRP)and titanium alloy have been extensively used as a hybrid structure in modern aircrafts due to their excellent combination of mechanical properties and chemical *** study utilised NaOH anodising method to create micro-rough titanium surfaces for enhancing adhesive bonding between titanium alloy and CFRP laminates.A special and simple technique named Resin Pre-Coating(RPC)was also employed to improve the surface wetting of anodised titanium and grinded CFRP *** influences of anodising temperature and duration on the surface morphology,wettability and adhesive bond strength were *** single lap shear test results showed that the bond strength of specimens anodised at 20℃for 15 min improved by 135.9%and 95.4%,respectively,in comparison with that of acid pickled and grinded specimens(without RPC treatment).Although increasing the anodising temperature and duration produced rougher titanium surfaces,the adhesively bonded joints were not strong enough due to relatively friable titanium oxide layers.

关键词： Carbon Fibre Reinforced Polymer(CFRP) Titanium alloy Anodising Resin pre-coating Adhesive joints

Improvement of interleaving Aramid pulp microfibers on compressive strengths of carbon fiber reinforced polymers with and without impact

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2023年第10期36卷 459-470页

作者： Fei CHENG Guangming YANG yunsen hu Bingyan YUAN Xiaozhi hu School of Materials Science and Engineering Southwest University of Science and TechnologyMianyang 621010China Engineering Research Center of Biomass Materials Ministry of EducationSouthwest University of Science and TechnologyMianyang 621010China Department of Mechanical Engineering University of Western AustraliaPerth WA6009Australia

Compressive strengths and elastic moduli of Carbon Fiber Reinforced Polymer(CFRP)composites can be noticeably improved by multiple ultra-thin interlays with non-woven Aramid Pulp(AP)micro/nano-fibers.10-ply CFRP specimens with 0,2,4,6,8 g/m^(2)AP were tested under uniaxial *** flexible AP fibers,filling the resin-rich regions and further constructing the fiber bridging at the ply interfaces,can effectively suppress delamination growth and lead to very good improvements both in the compressive strength and the elastic *** CFRP specimen with an optimum interlay thickness has a distinct shear failure mode instead of the typical delamination cracking along the direction of continuous carbon *** Strengths After Impacts(CAI)of 12.35 J were also measured,up to 90%improvement in CAI has been *** is concluded those ultra-thin interlays of non-woven AP micro/nano-fibers are beneficial to design and manufacture“high strength”CFRP composites.

关键词： Compressive strength Carbon Fiber Reinforced Polymer(CFRP) Aramid pulp Interleaving Interfacial reinforcing

Constructing quasi-vertical fiber bridging behaviors of aramid pulp at interlayer of laminated basalt fiber reinforced polymer composites to improve flexural performances

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2023年第12期36卷 477-488页

作者： Guangming YANG Fei CHENG Shihao ZUO Jinheng ZHANG Yang XU yunsen hu Xiaozhi hu Yong WEI Guangjun GOU School of Materials and Chemistry Southwest University of Science and TechnologyMianyang 621010China Engineering Research Center of Biomass Materials Ministry of EducationSouthwest University of Science and TechnologyMianyang 621010China School of Mechanical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Department of Mechanical Engineering University of Western AustraliaPerth WA 6009Australia

Basalt Fiber Reinforced Polymer(BFRP)composites have huge potential application respects for some civil fields due to enough strength/modulus to weight and low cost by replacing carbon fiber *** at the issues in the Resin-Rich Region(RRR)and Interfacial Transition Region(ITR)of fiber reinforced polymer composites,the characteristic Aramid Pulp(AP)fibers with micro-fiber trunk and nano-fiber branches were manufactured into multiple non-woven ultra-thin interleaving at the interlayers of BFRP composites via compression molding to reinforce the flexural strengths and elastic *** fibers were introduced into RRR to form interleaving at the interlayer,the brittle epoxy adhesive layer was improved and enabled to avoid cracking under a low external *** fiber branches of AP were also embedded into BF layer to construct quasi-vertical fiber bridging behaviors in ITR,stronger mechanical interlocking was created to prevent crack propagation along the bonding interface of BF/***-point bending testing results showed the interleaving film with 4 g/m^(2)AP exhibited the best effect among various areal densities and yielded average 315.75 MPa in flexural strength and 21.38 GPa in elastic modulus,having a 63.4%increment and a 47.1%increment respectively compared with the ***,the simple and low-cost AP interleaving is confirmed as an effective method in improving interlayer structure and flexural performance of BFRP composites,which may be considered to manufacture high-performance laminated fiber reinforced polymer composites in civil aviation industry.

关键词： Basalt fiber reinforced polymer Aramid pulp fiber Resin-rich region Interfacial transition region Quasi-vertical fiber bridging behavior Flexural performance improvement

铝合金-CFRP液氮温度下弯曲强度的强化研究

在线全文

学校读者我要写书评

暂无评论

复合材料学报 2022年第6期39卷 3009-3019页

作者：程飞胡云森西南科技大学材料科学与工程学院绵阳621010 西澳大利亚大学机械工程学院珀斯410082

随着铝合金-碳纤维增强树脂复合材料(CFRP)逐渐应用到火箭推进器,其低温环境下的粘结性能强化已引起广泛关注。针对环氧接头潜在的粘接界面缺陷,采用阳极氧化和砂化分别处理铝合金和CFRP板表面制得多孔表面。采用树脂预涂(RPC)技术消除... 详细信息

随着铝合金-碳纤维增强树脂复合材料(CFRP)逐渐应用到火箭推进器,其低温环境下的粘结性能强化已引起广泛关注。针对环氧接头潜在的粘接界面缺陷,采用阳极氧化和砂化分别处理铝合金和CFRP板表面制得多孔表面。采用树脂预涂(RPC)技术消除铝合金孔道根部原有的大分子环氧树脂空穴缺陷,也可通过RPC技术将增强纤维碳纳米管浸渍到铝合金表面的孔道中,形成准Z方向的纤维桥联,进一步提高环氧接头的粘结强度。三点弯曲试验(3-P-B)结果表明,室温下处理后的铝合金-CFRP弯曲强度提高了14.6%,液氮温度下弯曲强度提高了27.6%。经过表面处理后,CFRP在室温和液氮温度下的破坏模式均由较弱的界面脱胶破坏转变为主体结构的断裂破坏。总之,系列有效的处理方法可为低温液体燃料箱的工业应用提供另一种参考。

关键词：电化学刻蚀粘接性能强化准Z方向碳纳米管树脂预涂技术液氮温度

在线全文

学校读者我要写书评

暂无评论

慈善大家于右任:办粥厂办报纸救灾民

社会与公益 2021年第12期12卷 94-96页

作者：胡运森不详

于右任(1879年4月11日-1964年11月10日),汉族,陕西三原人,祖籍泾阳斗口于村,中国近现代政治家、教育家、书法家。平民出身让于右任有一颗感同身受的平民之心,不论如何颠沛,不论时世维艰,不论地位变化,他的心始终贴近广大贫苦群众。每次... 详细信息

于右任(1879年4月11日-1964年11月10日),汉族,陕西三原人,祖籍泾阳斗口于村,中国近现代政治家、教育家、书法家。平民出身让于右任有一颗感同身受的平民之心,不论如何颠沛,不论时世维艰,不论地位变化,他的心始终贴近广大贫苦群众。每次回三原老家,他总是详细了解左邻右舍和一些穷亲朋的生活境况,并叫家人去送些款物。他衣着简朴,经常穿一件灰布大袍子、布鞋布袜子,饮食平常小米饭、红豆稀粥、黄菜等就是一餐;他一生没给家里买过一亩地、盖过一间房,对赈灾济民,扶贫帮困却不惜余力。

关键词：于右任粥厂生活境况办报纸中国近现代陕西三原扶贫帮困

Self-assembled monolayer modulated Plateau-Rayleigh instability and enhanced chemical stability of silver nanowire for invisibly patterned,stable transparent electrodes

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

Nano Research 2022年第5期15卷 4552-4562页

作者： Gui-Shi Liu huajian Zheng Zijie Zeng Yexiong Wang Weidong Guo Ting Wang Heng Chen yunsen Chen Shiqi hu Lei Chen Yaofei Chen Weiguang Xie Bo-Ru Yang Yunhan Luo Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Key Laboratory of Visible Light Communications of GuangzhouKey Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education InstitutesDepartment of Optoelectronic EngineeringJinan UniversityGuangzhou 510632China Siyuan Laboratory Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy MaterialsDepartment of PhysicsJinan UniversityGuangzhou 510632China State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information TechnologySun Yat-sen UniversityGuangzhou 510006China

Patterned silver nanowire(AgNW)networks have been widely used as transparent electrodes in many optoelectrical ***,obvious patterning visibility and poor thermostability of AgNW are still limiting its practical ***,we report self-assembled monolayer(SAM)modulated Plateau-Rayleigh instability(PRI)of AgNW,which allows invisible patterning and superior stability of the AgNW *** opposite effects of different SAMs on the PRI are identified:the alkanethiol SAMs activate surface atom diffusion while the mercaptobenzoheterocyclic(MBH)SAMs suppress the *** degradation temperature of the AgNWs can be therefore,for the first time,tuned in the range of 193-381℃,so that the AgNW network can be patterned via PRI with a tiny optical difference between the insulative and conductive regions,i.e.,patterning ***,the MBH SAMs provide AgNW with excellent durability under thermal annealing and oxidation,which enhances the maximum heating temperature of the AgNW transparent heater by over 120℃.Beyond the micro-patterning,we consider that the developed SAM strategy can be extended to other metal nanowires for stability improvement and has huge potential in nanoengineering of one-dimensional metal materials.

关键词： Plateau-Rayleigh instability self-assembled monolayer invisible patterning thermal stability

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

单边螺栓-T形件连接节点滞回性能试验研究

建筑结构 2023年第10期53卷 55-61页

作者：张玉芬王夺高嘉岐苗云森胡和涛河北工业大学土木与交通学院天津300401 中国建筑一局(集团)有限公司北京102600

基于复式钢管混凝土双层钢管的截面特点,设计了单边螺栓-T形件连接节点,并对5个单边螺栓-T形件连接节点和1个穿芯螺栓-T形件连接节点进行了低周往复荷载试验。通过数字散斑相关方法(DSCM)得到了试件的弯矩-转角变化关系曲线。结果表明:... 详细信息

基于复式钢管混凝土双层钢管的截面特点,设计了单边螺栓-T形件连接节点,并对5个单边螺栓-T形件连接节点和1个穿芯螺栓-T形件连接节点进行了低周往复荷载试验。通过数字散斑相关方法(DSCM)得到了试件的弯矩-转角变化关系曲线。结果表明:试件滞回曲线均呈饱满Z形,节点破坏形态为T形件翼缘屈服后钢梁塑性变形,T形件因不同的加肋方式出现了三种变形特征。除了T形件翼缘厚度较薄且未加肋的试件为部分强度半刚性节点外,其余节点试件均为全强度半刚性节点;加肋T形件节点比无肋试件极限承载力提高了30%,但延性明显降低;对比穿芯螺栓-T形件连接节点,单边螺栓栓-T形件连接节点初始刚度略低、承载力相当,但变形能力明显提高,滞回性能得到改善;往复荷载下单边螺栓-T形件连接节点为拉压交替式工作,受拉螺栓能够得到较强的锚固连接强度,单边螺栓-T形件连接节点在复式钢管混凝土结构中传力可靠,结构整体性较好。

关键词：单边螺栓 T形件低周往复荷载试验滞回性能承载力延性

微柱高效液相色谱法测定环境样品中的铁、钴、镍、铜、锌、锰

在线全文

学校读者我要写书评

暂无评论

化学通报 2005年第4期68卷 314-317页

作者：司云森胡秋芬杨光宇尹家元昆明理工大学理学院玉溪师范学院化学系云南大学化学系昆明650091 云南大学化学系

研究了用 2-(2-喹啉偶氮 )-间苯二酚 (QAR)为柱前衍生试剂 ,以WatersXterraTM RP18(1 .0×5 0mm ,2. 5 μm)微柱为固定相 ,60 %的甲醇 (内含 0 . 5 %的醋酸 )为流动相 ,高效液相色谱分离、二极管矩阵检测器测定铁、钴、镍、铜、锌和... 详细信息

研究了用 2-(2-喹啉偶氮 )-间苯二酚 (QAR)为柱前衍生试剂 ,以WatersXterraTM RP18(1 .0×5 0mm ,2. 5 μm)微柱为固定相 ,60 %的甲醇 (内含 0 . 5 %的醋酸 )为流动相 ,高效液相色谱分离、二极管矩阵检测器测定铁、钴、镍、铜、锌和锰的方法。根据信噪比 (S N =3 )得各金属离子的检测限分别为 :铁3 μg L、钴 4μg L、镍 2 μg L、铜 4μg L、锌 5 μg L、锰 8μg L ,方法用于环境样品中痕量铁、钴、镍、铜、锌、锰的测定 ,相对标准偏差在 1 . 6%～ 3 . 5 %之间 ,标准回收率为 93 %～ 1 0 7%。

关键词：微柱高效液相色谱法环境样品测定钴镍铜锌锰柱前衍生试剂液相色谱分离相对标准偏差标准回收率间苯二酚喹啉偶氮金属离子固定相流动相检测器二极管检测限信噪比痕量铁矩阵

在线全文

学校读者我要写书评

暂无评论

醇类陶瓷专用磨削液的作用机理研究

机械科学与技术 2005年第12期24卷 1466-1468,1498页

作者：吴志远田欣利胡仲翔林允森于爱兵北京装甲兵工程学院再制造技术国防科技重点实验室北京100072 天津大学机械工程学院天津300072

用添加长链醇的有机磨削液来提高工程陶瓷加工效率是一种非常有效的方法。在切入磨削试验中,陶瓷磨削效率达到了普通磨削液的2.4倍。通过应用拉曼光谱技术和纳米压痕技术对液固界面进行了物质结构分析和硬度测试,发现陶瓷和有机切削液... 详细信息

用添加长链醇的有机磨削液来提高工程陶瓷加工效率是一种非常有效的方法。在切入磨削试验中,陶瓷磨削效率达到了普通磨削液的2.4倍。通过应用拉曼光谱技术和纳米压痕技术对液固界面进行了物质结构分析和硬度测试,发现陶瓷和有机切削液之间的液固界面的拉曼光谱存在异常振峰,而且该异常振峰的出现与磨削表面平均硬度值的变化规律非常接近。此效应可能会改变陶瓷磨削过程中金刚石磨粒微刃的切削方式,进而影响磨削效率和加工质量,因此非常值得深入地探讨。

关键词：醇类磨削液显微硬度拉曼光谱

在线全文

学校读者我要写书评

暂无评论

香茶菜免疫活性成分的筛选研究

中药材 2005年第11期28卷 1015-1017页

作者：陈子李云森周吉燕曹露晔胡月娟李仪奎上海中医药大学中药研究所上海201203 中国科学院上海药物研究所上海201203 上海中医药大学科技实验中心上海201203

目的:以药理评价为导向,分离香茶菜中具有免疫活性的部位。方法:以有丝分裂原伴刀豆蛋白A(Co-nA)活化小鼠脾脏T淋巴细胞,采用噻唑盐(MTT)实验方法,体外检测香茶菜提取物对淋巴细胞增殖反应的影响,筛选具有免疫活性的有效部位。结果:香... 详细信息

目的:以药理评价为导向,分离香茶菜中具有免疫活性的部位。方法:以有丝分裂原伴刀豆蛋白A(Co-nA)活化小鼠脾脏T淋巴细胞,采用噻唑盐(MTT)实验方法,体外检测香茶菜提取物对淋巴细胞增殖反应的影响,筛选具有免疫活性的有效部位。结果:香茶菜具有免疫增强作用的部位是FA、FC;而FB和FD则在不同浓度下有增强与抑制的不同作用。从FB中进一步分离得到的FB-1和FB-2以免疫增强作用为主,而FB-3和FB-4则以免疫抑制作用为主。结论:香茶菜中含有免疫活性成分。

关键词：香茶菜免疫药理 MTT试验