Composites Engineering最新文献_第10页

Joining aluminium/nicalon composite by diffusion bonding 扩散连接铝/nicalon复合材料

Composites Engineering Pub Date : 1995-01-01 DOI: 10.1016/0961-9526(95)00016-G

R.S. Bushby, V.D. Scott

引用次数: 3

A discrete model for the design sensitivity analysis of multi-layered composite shells of revolution 多层复合材料旋转壳设计灵敏度分析的离散模型

Composites Engineering Pub Date : 1995-01-01 DOI: 10.1016/0961-9526(95)00027-K

Cristovão M. Mota Soares, N.M. Marques Cordeiro, J.Infante Barbosa

引用次数: 12

Dynamic compressive properties of composites at interior ballistic rates of loading—Experimental method 复合材料在内弹道加载速率下的动态压缩性能-实验方法

Composites Engineering Pub Date : 1995-01-01 DOI: 10.1016/0961-9526(95)00021-E

Jerome T. Tzeng, Ara S. Abrahamian

引用次数: 9

Thermal shock and fatigue resistance evaluation of functionally graded coating for gas turbine blades by laser heating method 激光加热法评定燃气轮机叶片功能梯度涂层的热冲击和抗疲劳性能

Composites Engineering Pub Date : 1995-01-01 DOI: 10.1016/0961-9526(95)00041-K

C.Y. Jian, Toshiyuki Hashida, Hideaki Takahashi, Masahiro Saito

{"title":"Thermal shock and fatigue resistance evaluation of functionally graded coating for gas turbine blades by laser heating method","authors":"C.Y. Jian, Toshiyuki Hashida, Hideaki Takahashi, Masahiro Saito","doi":"10.1016/0961-9526(95)00041-K","DOIUrl":"10.1016/0961-9526(95)00041-K","url":null,"abstract":"<div><p>This paper presents results of thermal shock and fatigue tests conducted on ZrO<sub>2</sub>-based thermal barrier coating systems under the temperature environments for advanced gas turbines. A CO<sub>2</sub> laser heating method was employed to heat two types of cylindrical specimens with conventional two-layer coating and functionally graded coating. Acoustic emission (AE) signals and temperatures were monitored to detect the fracture process of the coating systems. The measurements of AE signals and temperatures were correlated with the growth of coating delamination. In order to investigate the effects of heating rate and cooling rate on the coating fracture, four different heating/cooling thermal cycles were used in the thermal shock and fatigue tests. Using the AE and temperature results, the fracture process of the coating systems is examined, and the delamination growth rate during fatigue tests is determined. Based on the results, a suitable thermal cycle is determined for an accelerated testing method of the ZrO<sub>2</sub>-based coating systems. Finally, usefulness of application of functionally graded coating systems is discussed.</p></div>","PeriodicalId":100298,"journal":{"name":"Composites Engineering","volume":"5 7","pages":"Pages 879-889"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0961-9526(95)00041-K","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78331364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 48

FEM study of the effects of interlayers and creep in reducing residual stresses and strains in ceramic-metal joints 中间层和蠕变对降低陶瓷-金属接头残余应力和应变影响的有限元研究

Composites Engineering Pub Date : 1995-01-01 DOI: 10.1016/0961-9526(95)00035-L

R.L. Williamson, B.H. Rabin, G.E. Byerly

{"title":"FEM study of the effects of interlayers and creep in reducing residual stresses and strains in ceramic-metal joints","authors":"R.L. Williamson, B.H. Rabin, G.E. Byerly","doi":"10.1016/0961-9526(95)00035-L","DOIUrl":"10.1016/0961-9526(95)00035-L","url":null,"abstract":"<div><p>Finite element numerical models are used to compute residual stresses and strains that develop in a joined Al<sub>2</sub>O<sub>3</sub>Ni specimen during cooling from an assumed fabrication temperature. The concept of stress and strain control via interlayers is investigated by considering a homogeneous compliant interlayer, a composite interlayer, and a variety of functional gradient material (FGM) interlayers. Additionally, a power-law creep constitutive relation is incorporated into the model to investigate the effects and relative importance of time-dependent deformation during joining. Graded microstructures are treated as a series of perfectly bonded layers, with each layer having slightly different properties. Constitutive relations for the composite and gradient inter-layers are estimated using a modified rule-of-mixtures approximation. Stress and strain distributions are shown to be highly dependent upon interlayer properties, and stress reductions are only predicted when the interlayer is highly compliant, or when an “optimized” FGM microstructure is used. For reasonable rates of cooling, creep is shown to have a minor influence on the residual stress state achieved at room temperature; however, above approximately 700 K creep strains are significant, suggesting that creep should be included in models intended for predicting joint behavior at elevated temperatures.</p></div>","PeriodicalId":100298,"journal":{"name":"Composites Engineering","volume":"5 7","pages":"Pages 851-863"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0961-9526(95)00035-L","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79127877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 60

Experimental and theoretical study of the thermal expansion behavior of aluminium reinforced by continuous ceramic fibers 连续陶瓷纤维增强铝的热膨胀行为的实验与理论研究

Composites Engineering Pub Date : 1995-01-01 DOI: 10.1016/0961-9526(95)93978-5

H.J. Böhm, H.P. Degischer, W. Lacom, J. Qu

引用次数: 16

Influence of damage on the creep behaviour of ceramic matrix composites 损伤对陶瓷基复合材料蠕变行为的影响

Composites Engineering Pub Date : 1995-01-01 DOI: 10.1016/0961-9526(95)00058-U

F. Lamouroux , J.L. Vallés, M. Steen

引用次数: 4

The biomimetic design of worst bonding interface for ceramic matrix composites 陶瓷基复合材料最差结合界面的仿生设计

Composites Engineering Pub Date : 1995-01-01 DOI: 10.1016/0961-9526(95)00061-Q

Benlian Zhou

引用次数: 6

Hygrothermal effects on viscoelastic responses of laminated composites 湿热对层合复合材料粘弹性响应的影响

Composites Engineering Pub Date : 1995-01-01 DOI: 10.1016/0961-9526(95)90712-K

Sung Yi , Harry H. Hilton

引用次数: 37

High temperature mechanical and thermal stability of silicate matrix composites 硅酸盐基复合材料的高温力学和热稳定性

Composites Engineering Pub Date : 1995-01-01 DOI: 10.1016/0961-9526(95)00057-T

S. Sutherland, K.P. Plucknett , M.H. Lewis

{"title":"High temperature mechanical and thermal stability of silicate matrix composites","authors":"S. Sutherland, K.P. Plucknett , M.H. Lewis","doi":"10.1016/0961-9526(95)00057-T","DOIUrl":"10.1016/0961-9526(95)00057-T","url":null,"abstract":"<div><p>Two silicate matrix composites, Pyrex/Nicalon and BaO-MgO-Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> (BMAS)/ Tyranno, have been used to study composite stability with respect to time at temperature, and under applied stress. Samples aged in an oxidizing atmosphere have been tested in flexure at room temperature, and also by fibre “push-down” to investigate the interfacial properties. Tensile tests have been carried out from room temperature up to 1200°C on the BMAS material, and it was found that a steady degradation in strength occurred from 500 to 1100°C, with a small but significant increase up to 1200°C. Creep experiments have been performed on both the Pyrex and BMAS materials, it was found that Pyrex has a creeping matrix and elastic fibres below the matrix softening point, whereas the BMAS composite showed creep in both components, though at long times the creep rate was shown to be fibre controlled. A simple model for the development of strain with time is reported and used to obtain values for the creep rate of both the matrix and fibres. Activation energies were calculated for the creep processes in both matrix and fibres. The values obtained were: Pyrex, 256 kJ mol<sup>−1</sup>, BMAS matrix, 300 kJ mol<sup>−1</sup> and the Tyranno fibres, 495 kJ mol<sup>−1</sup>.</p></div>","PeriodicalId":100298,"journal":{"name":"Composites Engineering","volume":"5 10","pages":"Pages 1367-1378"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0961-9526(95)00057-T","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89458576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15