Journal of Composites Technology & Research最新文献_第6页

Evaluation of Film-Substrate Interface Durability Using a Shaft-Loaded Blister Test 用轴载吸塑试验评价膜-基材界面耐久性

Journal of Composites Technology & Research Pub Date : 2001-01-01 DOI: 10.1520/CTR10908J

K. Liao, K. Wan

引用次数: 11

Single-fiber fragmentations of AS-4 carbon fiber embedded in Epon 828 under the effect of elevated temperatures 高温作用下AS-4碳纤维单纤维碎片嵌入Epon 828

Journal of Composites Technology & Research Pub Date : 2001-01-01 DOI: 10.1520/CTR10911J

Ea Armanios, R. Bucinell, Dw Wilson, Mb Walther, K. Reifsnider, M. Madhukar, Genidy

{"title":"Single-fiber fragmentations of AS-4 carbon fiber embedded in Epon 828 under the effect of elevated temperatures","authors":"Ea Armanios, R. Bucinell, Dw Wilson, Mb Walther, K. Reifsnider, M. Madhukar, Genidy","doi":"10.1520/CTR10911J","DOIUrl":"https://doi.org/10.1520/CTR10911J","url":null,"abstract":"Single fiber fragmentation tests were performed over a range of elevated temperatures (ambient to 160°C) to study the effect of temperature on the fiber-matrix interface. In order to understand the mechanical performance of a polymer/carbon fiber composite system, the micromechanical performance must be understood. The mechanical performance of a composite material is dependent on the fiber-matrix interface region. The nature of the fiber-matrix interface controls the interfacial shear strength and this is an important parameter in the formulation of shear-lag and other micromechanical models. Micromechanical shear-lag models are used to estimate macromechanical properties of composite materials. Environmental conditions that affect the macromechanical properties of polymer composites need to be understood at the micromechanical level. Temperature is one example of an environmental condition that influences the mechanical response of some composite systems. The study presented in this paper uses the measurement of broken fiber lengths resulting from the multiple fracture of a single fiber that is embedded in resin with applied load. The material system used in this study was an AS4-carbon-fiber/Epon-828/mPDA-epoxy-resin-system. The critical fragmentation lengths were measured with the aid of a microscope, and the critical lengths were found to increase 70% from ambient temperature to 160°C.","PeriodicalId":15514,"journal":{"name":"Journal of Composites Technology & Research","volume":"1 1","pages":"36-41"},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88422117","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: 4

Effect of Environment on Fracture Toughness and Debond Growth of Aluminum/FM ® 73/Boron-Epoxy Adhesively Bonded Joints 环境对铝/FM®73/硼-环氧胶合接头断裂韧性和粘结生长的影响

Journal of Composites Technology & Research Pub Date : 2001-01-01 DOI: 10.1520/CTR10912J

K. Lubke, L. Butkus, W. Johnson

引用次数: 8

Viscoelastic modeling of press-fitted composite cylinders 压合复合材料圆柱体的粘弹性建模

Journal of Composites Technology & Research Pub Date : 2001-01-01 DOI: 10.1520/CTR10909J

J. Tzeng

引用次数: 9

A Damage Evolution Model for Viscoelastic Composite Laminates 粘弹性复合材料层合板的损伤演化模型

Journal of Composites Technology & Research Pub Date : 2001-01-01 DOI: 10.1520/CTR10907J

N. Akshantala, L. Brinson

引用次数: 9

Bolt Bearing Behavior of Highly Loaded Polymer Matrix Composite Joints at Elevated Temperatures With and Without Clamp-Up 高温下高载荷聚合物基复合材料接头的螺栓承载性能，有和没有夹紧

Journal of Composites Technology & Research Pub Date : 2000-10-01 DOI: 10.1520/CTR10622J

R. Wright, W. Johnson, S. Sacks, H. Ahmad

{"title":"Bolt Bearing Behavior of Highly Loaded Polymer Matrix Composite Joints at Elevated Temperatures With and Without Clamp-Up","authors":"R. Wright, W. Johnson, S. Sacks, H. Ahmad","doi":"10.1520/CTR10622J","DOIUrl":"https://doi.org/10.1520/CTR10622J","url":null,"abstract":"Data are presented on time-dependent behavior of bolted joints made from 64-ply IM7 carbon fiber/K3B thermoplastic polyimide quasi-isotropic lay-up tested in pure bolt bearing and in bearing bypass. Composite panels were aged at temperatures of 177 and 204°C for 5 000 and 10 000 (h) to simulate cumulative effects of supersonic flight conditions on a bolted composite joint. Changes in joint-bearing capacity and determination of time-dependent behavior have been covered in this study. Test coupons sized and drilled to correspond to the ratios found in actual joints were loaded over a wide range at both with and without clamp-up forces. Testing at 177°C simulated supersonic cruise temperature. Bearing creep testing revealed ripe-dependent behavior only in a very narrow loading region, above which bearing failure occurred almost instantaneously and below which no damage occurred. Testing of aged material showed degradation in material aged at 177°C for 5000 h; however, material aged at 177°C for 10 000 h demonstrated a recovery in bearing capacity, while material aged at temperatures of 177 and 204°C for 5000 and 10 000 h showed neither increased nor equivalent performance degradation. Testing with neat resin demonstrated that the matrix material becomes more brittle both with temperature and with aging. It was concluded that this material experiences no significant time-dependent deformation for temperatures at or below 204°C.","PeriodicalId":15514,"journal":{"name":"Journal of Composites Technology & Research","volume":"1 1","pages":"33-39"},"PeriodicalIF":0.0,"publicationDate":"2000-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89140340","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: 7

Failure Initiation in Translaminar Reinforced Composites 跨层增强复合材料的破坏起始

Journal of Composites Technology & Research Pub Date : 2000-10-01 DOI: 10.1520/CTR10621J

L. Dickinson, G. Farley, Mk Hinders

引用次数: 9

Fiber-Reinforced Composite and Wood Bonded Interfaces: Part 1. Durability and Shear Strength 纤维增强复合材料和木材粘合界面:第1部分。耐久性和抗剪强度

Journal of Composites Technology & Research Pub Date : 2000-10-01 DOI: 10.1520/CTR10544J

J. Davalos, P. Qiao, B. Trimble

{"title":"Fiber-Reinforced Composite and Wood Bonded Interfaces: Part 1. Durability and Shear Strength","authors":"J. Davalos, P. Qiao, B. Trimble","doi":"10.1520/CTR10544J","DOIUrl":"https://doi.org/10.1520/CTR10544J","url":null,"abstract":"Fiber-reinforced plastic (FRP) composites have shown the potential for reinforcement of wood structures (e.g., bonding of FRP strips or fabrics to wood members). Although significant increases in stiffness and strength are achieved by this reinforcing technique, there is a concern about the reliable performance of the FRP-wood adhesive bond, which is susceptible to delamination, The overall objective of this two-part paper is to develop a qualification program to evaluate the service performance and fracture of composite/wood bonded interfaces. Two types of FRP-wood interfaces are studied: phenolic FRP-wood and epoxy FRP-wood bonds. In the present paper, Part 1, the durability and shear strength of FRP-wood bonds are evaluated by modified ASTM tests. First, the service performance and durability of FRP-wood interface bond is evaluated using a modified ASTM delamination test. Then, the apparent shear strengths of bonded interfaces under both dry and wet conditions are obtained from modified ASTM block-shear tests. It is shown that the modified ASTM D 2559 standard test can be successfully used to study the effect of several parameters (e.g., bonding pressure, assembling time, and coupling agents) on bondline performance under wet-dry exposure cycles. Then for the best combination of parameters, the average interface shear strengths can be obtained from block-shear tests of ASTM D 905, modified for hybrid laminates. Mode I fracture of FRP-wood bonded interfaces and guidelines for FRP-wood bond performance evaluation are presented in the companion Part 2 paper.","PeriodicalId":15514,"journal":{"name":"Journal of Composites Technology & Research","volume":"48 1","pages":"224-231"},"PeriodicalIF":0.0,"publicationDate":"2000-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85795256","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: 55

High Strain Rate Characterization of a Glass/Epoxy Composite 玻璃/环氧复合材料的高应变速率表征

Journal of Composites Technology & Research Pub Date : 2000-10-01 DOI: 10.1520/CTR10619J

O. Okoli, G. Smith

引用次数: 29

The durability of fiber composites: The case for mechanism-based models 纤维复合材料的耐久性:基于力学模型的案例

Journal of Composites Technology & Research Pub Date : 2000-10-01 DOI: 10.1520/CTR10539J

W. Johnson, J. Masters, Dw Wilson, S. Spearing

引用次数: 1