发布求助
文献互助 智能选刊 最新文献

Journal of Composites Technology & Research最新文献

筛选
英文 中文
Failure Analysis of ±45° Off-Axis Woven Fabric Composite Specimens ±45°离轴机织复合材料试样失效分析
Journal of Composites Technology & Research Pub Date : 2001-07-01 DOI: 10.1520/CTR10555J
G. Odegard, D. Armentrout, K. Searles, L. Kumosa, J. Sutter, M. Kumosa
{"title":"Failure Analysis of ±45° Off-Axis Woven Fabric Composite Specimens","authors":"G. Odegard, D. Armentrout, K. Searles, L. Kumosa, J. Sutter, M. Kumosa","doi":"10.1520/CTR10555J","DOIUrl":"https://doi.org/10.1520/CTR10555J","url":null,"abstract":"The purpose of this research is to evaluate the mechanical response of eight harness satin woven graphite/polyimide composite specimens using the ±45° test. A series of tensile tests have been conducted at room temperature to evaluate the effect of specimen width as well as monotonic, progressive, and multiple loadings on the response of the composite specimens. Acoustic emission techniques have been employed to monitor damage initiation and progression in the specimens at different stages of loading. In addition, nonlinear finite element computations have been conducted to determine stress distributions in the ±45° fabric specimens. It has been shown that the specimen width effect is strong and should not be ignored in a failure analysis of the fabric composite using the ±45° test. The shear strength of the composite determined from the maximum loads increases substantially with the width of the specimen. It has also been shown in this research that the initiation of intralaminar damage in the graphite/polyimide composite can be monitored using acoustic emission. The initiation of interlaminar damage can be determined either from the characteristic knees on the load/displacement diagrams or from the acoustic emission data.","PeriodicalId":15514,"journal":{"name":"Journal of Composites Technology & Research","volume":"12 4 1","pages":"205-224"},"PeriodicalIF":0.0,"publicationDate":"2001-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79905024","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: 12
Bridging Stress Distributions During Fatigue Crack Growth in Continuously Reinforced [0] Metal Matrix Composites 连续增强金属基复合材料疲劳裂纹扩展过程中的桥接应力分布[0]
Journal of Composites Technology & Research Pub Date : 2001-04-01 DOI: 10.1520/CTR10915J
R. John, D. Buchanan
{"title":"Bridging Stress Distributions During Fatigue Crack Growth in Continuously Reinforced [0] Metal Matrix Composites","authors":"R. John, D. Buchanan","doi":"10.1520/CTR10915J","DOIUrl":"https://doi.org/10.1520/CTR10915J","url":null,"abstract":"An optimization procedure was developed to deduce the fiber bridging stresses from crack opening displacements measured in situ during crack growth. This procedure was used to determine the bridging stress distribution during fatigue crack growth in a unidirectionally reinforced metal matrix composite (SCS-6/TIMETAL®21S). The bridging stress is non-zero at the crack tip contrary to predictions from conventionally used shear lag models. The bridging stress at the crack tip is proportional to the applied far-field stress. The deduced bridging law is similar to the new shear lag models with non-zero bridging stresses at the crack tip. Any bridging model can be used to predict the crack growth behavior by choosing appropriate values of the frictional shear stress (T). Consequently, the magnitude of the stresses in the fibers bridging the crack will depend on the fiber bridging model. Hence, the fiber tensile strength required to predict the onset of fiber failure will also depend on the fiber bridging model.","PeriodicalId":15514,"journal":{"name":"Journal of Composites Technology & Research","volume":"392 1","pages":"69-81"},"PeriodicalIF":0.0,"publicationDate":"2001-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76615932","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: 1
Abrasive Water Jet Machining Mechanisms in Continuous-Fiber Ceramic Composites 连续纤维陶瓷复合材料的磨料水射流加工机理
Journal of Composites Technology & Research Pub Date : 2001-04-01 DOI: 10.1520/CTR10916J
M. Ramulu, M. Jenkins, Z. Guo
{"title":"Abrasive Water Jet Machining Mechanisms in Continuous-Fiber Ceramic Composites","authors":"M. Ramulu, M. Jenkins, Z. Guo","doi":"10.1520/CTR10916J","DOIUrl":"https://doi.org/10.1520/CTR10916J","url":null,"abstract":"Advanced continuous fiber-reinforced ceramic composite (CFCC) materials have been machined with abrasive water jet (AWJ) drilling and cutting processes. Cutting forces, surface microstructure, and retained tensile behaviors were evaluated using dynamometry, surface profilometry, scanning electron microscopy, and tensile testing, respectively. The AWJ surface characteristics, i.e., roughness and the micromechanisms of material removal of CFCCs, were compared with those of a conventional diamond saw cut surface. Material removal mechanisms for AWJ cutting of CFCC consist of a combination of bending, shearing, micromachining, and erosion. The micromechanisms associated with AWJ hole drilling, or piercing on the other hand, are microfracture of fibers and matrix, delamination, and fragmentation of fiber bundles. The tensile mechanical behavior is negligibly different between the AWJ machined and diamond grit ground CFCC materials.","PeriodicalId":15514,"journal":{"name":"Journal of Composites Technology & Research","volume":"82 1","pages":"82-91"},"PeriodicalIF":0.0,"publicationDate":"2001-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85380281","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: 38
Biaxial and Triaxial Failure Strengths of 6061-T6 Aluminum and AS4/3501-6 Carbon/Epoxy Laminates Obtained by Testing Thickness-Tapered Cruciform Specimens 6061-T6铝和AS4/3501-6碳/环氧层合板的双轴和三轴破坏强度
Journal of Composites Technology & Research Pub Date : 2001-04-01 DOI: 10.1520/CTR10919J
J. Welsh, D. Adams
{"title":"Biaxial and Triaxial Failure Strengths of 6061-T6 Aluminum and AS4/3501-6 Carbon/Epoxy Laminates Obtained by Testing Thickness-Tapered Cruciform Specimens","authors":"J. Welsh, D. Adams","doi":"10.1520/CTR10919J","DOIUrl":"https://doi.org/10.1520/CTR10919J","url":null,"abstract":"Using a thickness-tapered cruciform specimen, uniaxial and biaxial tests were performed on 6061-T6 aluminum as well as biaxial and triaxial tests on an AS4/3501-6 carbon/epoxy cross-ply laminate. Designed in conjunction with a new triaxial test facility, the performance of the cruciform specimen was analyzed using an anisotropic, linear-elastic, finite element analysis. The results of this analysis, as well as the experimental data generated for both the aluminum and AS4/3501-6 carbon/epoxy material systems, are presented. An undesirable failure mode was observed in several biaxial tension tests, and the triaxial tension tests were not performed successfully. This study represents the initial effort using this specimen design and test facility, and several recommendations to improve the performance of the thickness-tapered cruciform specimen in future studies are presented. The potential of the triaxial testing facility and the thickness-tapered cruciform specimen has been demonstrated.","PeriodicalId":15514,"journal":{"name":"Journal of Composites Technology & Research","volume":"33 1","pages":"111-121"},"PeriodicalIF":0.0,"publicationDate":"2001-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74058397","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: 16
Effects of Chemical Environments on Pultruded E-Glass Reinforced Polyesters 化学环境对拉伸e玻璃增强聚酯的影响
Journal of Composites Technology & Research Pub Date : 2001-04-01 DOI: 10.1520/CTR10917J
Ea Armanios, R. Bucinell, Dw Wilson, K. V. Velde, P. Kiekens
{"title":"Effects of Chemical Environments on Pultruded E-Glass Reinforced Polyesters","authors":"Ea Armanios, R. Bucinell, Dw Wilson, K. V. Velde, P. Kiekens","doi":"10.1520/CTR10917J","DOIUrl":"https://doi.org/10.1520/CTR10917J","url":null,"abstract":"In this work, the chemical resistance of six kinds of pultruded E-glass fiber reinforced isophthalic polyesters are studied. They contain 50 w% or 60 w% glass. The composites were either unfilled or filled with calcium carbonate or kaolin clay. The mechanical, physical, optical, and structural properties of the pultruded flat profiles before and after immersion in seawater, demineralized water, sodium hydroxide (5%), and sulfuric acid (10%) were analyzed over the period of one year.","PeriodicalId":15514,"journal":{"name":"Journal of Composites Technology & Research","volume":"32 1","pages":"92-101"},"PeriodicalIF":0.0,"publicationDate":"2001-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87105280","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: 13
Delamination Growth and Thresholds in a Carbon/Epoxy Composite under Fatigue Loading 疲劳载荷下碳/环氧复合材料的分层生长和阈值
Journal of Composites Technology & Research Pub Date : 2001-04-01 DOI: 10.1520/CTR10914J
Ea Armanios, R. Bucinell, Dw Wilson, LE Asp, A. Sjögren, ES Greenhalgh
{"title":"Delamination Growth and Thresholds in a Carbon/Epoxy Composite under Fatigue Loading","authors":"Ea Armanios, R. Bucinell, Dw Wilson, LE Asp, A. Sjögren, ES Greenhalgh","doi":"10.1520/CTR10914J","DOIUrl":"https://doi.org/10.1520/CTR10914J","url":null,"abstract":"This paper presents a study on delamination growth in Mode I, Mode II and mixed mode under fatigue loading in an HTA/6376C composite. The computed slopes of the modified Paris plots were high. Therefore, threshold values of the strain energy release rate for delamination growth were determined. Low fatigue threshold values revealed a significant effect of fatigue loading. The largest effect was found for the ENF test (Mode II) for which the fatigue threshold value was only 10% of the critical strain energy release rate in static tests. Threshold values for MMB (mixed mode) and DCB (Mode I) tests were 15% and 23% of the static values, respectively. Fractographic evaluation revealed identical initial failure mechanisms in fatigue and static loading conditions for the ENF specimen. The ENF specimen failed by formation and coalescence of microcracks. The low fatigue threshold for the ENF specimen was explained by microscopical observations on the specimen edge. It was also shown that the fracture surfaces generated in static and fatigue DCB and MMB tests were similar.","PeriodicalId":15514,"journal":{"name":"Journal of Composites Technology & Research","volume":"73 1","pages":"55-68"},"PeriodicalIF":0.0,"publicationDate":"2001-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72665432","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: 185
Matrix properties of textile reinforced ceramic matrix composites measured by nanoindentation 纳米压痕法测定纺织增强陶瓷基复合材料的基体性能
Journal of Composites Technology & Research Pub Date : 2001-04-01 DOI: 10.1520/CTR10918J
D. Davidson, G. Pharr
{"title":"Matrix properties of textile reinforced ceramic matrix composites measured by nanoindentation","authors":"D. Davidson, G. Pharr","doi":"10.1520/CTR10918J","DOIUrl":"https://doi.org/10.1520/CTR10918J","url":null,"abstract":"Nanoindentation was used to measure the elastic modulus (E) and hardness (H) of the matrix materials of three ceramic composites reinforced with woven Nicalon fiber fabrics. The matrices included: (1) alumina produced by the Dimox process; (2) silicon carbide synthesized by chemical vapor infiltration; and (3) a SiC/BN material produced by polymer infiltration pyrolysis. The elastic moduli and hardnesses of the matrices of all three materials were found to be significantly lower than bulk ceramics of similar composition, probably due to porosity in the matrix and/or incomplete conversion of the infiltration materials to ceramic. Each of the composites was exposed to air at 750°C for 64 h, and measurements of E and H were made. The silicon carbide matrix was essentially unaffected, but two other materials exhibited significant reductions in both E and H caused by thermal exposure.","PeriodicalId":15514,"journal":{"name":"Journal of Composites Technology & Research","volume":"81 1","pages":"102-110"},"PeriodicalIF":0.0,"publicationDate":"2001-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80462513","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: 5
Drilling Damage of GFRP and Residual Mechanical Behavior - Part II: Static and Cyclic Bearing Loads 玻璃钢的钻孔损伤和残余力学性能。第2部分:静态和循环轴承载荷
Journal of Composites Technology & Research Pub Date : 2001-04-01 DOI: 10.1520/CTR10921J
E. Capello, V. Tagliaferri
{"title":"Drilling Damage of GFRP and Residual Mechanical Behavior - Part II: Static and Cyclic Bearing Loads","authors":"E. Capello, V. Tagliaferri","doi":"10.1520/CTR10921J","DOIUrl":"https://doi.org/10.1520/CTR10921J","url":null,"abstract":"The damage generated during the drilling of Glass Fiber Reinforced Plastics (GFRP) laminates can be detrimental for the mechanical behavior of the material around the hole, especially when the hole surface is subjected to a bearing load. The present work is the second part of a study aiming to investigate the effect of drilling conditions on the residual mechanical behavior of GFRP laminates subjected to a bearing load. To address this aim, holes drilled in different conditions were tested with static and cyclic bearing loads. The results of these tests were characterized through quantitative parameters and through microscopic observations of hole sections. Results indicate that for the range of the experimental conditions investigated, the main cause of mechanical failure is the micro damage generated at the inner part of the hole surface, while delamination plays a minor role. Therefore, despite the general attention paid during drilling to reduce delamination, the optimal drilling conditions should avoid the onset of microcracks distributed in the inner part of the hole.","PeriodicalId":15514,"journal":{"name":"Journal of Composites Technology & Research","volume":"25 1","pages":"131-137"},"PeriodicalIF":0.0,"publicationDate":"2001-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77693930","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: 41
Drilling Damage of GFRP and Residual Mechanical Behavior—Part I: Drilling Damage Generation 玻璃钢的钻削损伤及残余力学行为——第一部分:钻削损伤的产生
Journal of Composites Technology & Research Pub Date : 2001-04-01 DOI: 10.1520/CTR10920J
E. Capello, V. Tagliaferri
{"title":"Drilling Damage of GFRP and Residual Mechanical Behavior—Part I: Drilling Damage Generation","authors":"E. Capello, V. Tagliaferri","doi":"10.1520/CTR10920J","DOIUrl":"https://doi.org/10.1520/CTR10920J","url":null,"abstract":"The drilling of composite laminates generates several kinds of damage that can be detrimental to the mechanical behavior around the hole. The present work is the first part of a study that investigates the effect of the drilling on the residual mechanical behavior of glass fiber reinforced plastic (GFRP) laminates when the hole is subjected to bearing load. In the first part, the influence of drilling parameters on the type and extension of the damage is analyzed. The damage is described at the macro level (delaminated area) and at the micro level (cracks, fiber-matrix debonding, etc.). The Design of Experiments and Analysis of Variance techniques are used in order to determine the statistical influence of the drilling parameters on the delamination area. Moreover, the effects of drilling with or without a support beneath the specimens are analyzed and discussed. Results indicate that the degree of peel-up delamination depends on the feed rate and on the helix angle of the twist drill. Push-down delamination is mainly affected by the feed rate, by the presence of support beneath the specimen, and by the twist drill temperature.","PeriodicalId":15514,"journal":{"name":"Journal of Composites Technology & Research","volume":"26 1","pages":"122-130"},"PeriodicalIF":0.0,"publicationDate":"2001-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85318421","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: 31
Effects of Resin Consolidation on the Durability of IM7/PETI-5 Composites 树脂固结对IM7/ pti -5复合材料耐久性的影响
Journal of Composites Technology & Research Pub Date : 2001-01-01 DOI: 10.1520/CTR10910J
Ea Armanios, R. Bucinell, Dw Wilson, Veazie, Js Lindsay, E. Siochi
{"title":"Effects of Resin Consolidation on the Durability of IM7/PETI-5 Composites","authors":"Ea Armanios, R. Bucinell, Dw Wilson, Veazie, Js Lindsay, E. Siochi","doi":"10.1520/CTR10910J","DOIUrl":"https://doi.org/10.1520/CTR10910J","url":null,"abstract":"An experimental study was undertaken to investigate the mechanical response of the graphite fiber reinforced thermoplastic polyimide composite IM7/LaRC™-PETI-5 for use in long term durability tests. Composite panels were prepared using unidirectional prepreg and regions of different resin consolidation were identified using a nondestructive ultrasonic technique. Specimens representing four different degrees of resin consolidation were tested at room temperature in tension, compression, and flexure in the as-received state, as well as isothermally exposed for 1500 h at 177°C, and isothermally exposed to a “hot/wet” environment (80°C, 90%+ relative humidity). Results showed that specimens tested in tension and compression had a higher dependence on resin consolidation than those tested in flexure. However, specimens tested in flexure showed a greater property degradation from environmental exposure due to a lack of resin consolidation.","PeriodicalId":15514,"journal":{"name":"Journal of Composites Technology & Research","volume":"1 1","pages":"28-35"},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78998610","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: 1
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信