SAMPE 2019 - Charlotte, NC最新文献

{"title":"Characterizing Thermal Expansion of Large-scale 3D Printed Parts","authors":"D. Hoskins, V. Kunc, A HassenAhmed, J. Lindahl, C. Duty","doi":"10.33599/NASAMPE/S.19.1598","DOIUrl":"https://doi.org/10.33599/NASAMPE/S.19.1598","url":null,"abstract":"","PeriodicalId":162077,"journal":{"name":"SAMPE 2019 - Charlotte, NC","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122019865","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}

{"title":"Design of an Automated Ultrasonic Scanning System for In-situ Composite Cure Monitoring and Defect Detection","authors":"T. Hudson, F. Palmieri, T. Abbott, Jeffrey P. Seebo, E. Burke","doi":"10.33599/NASAMPE/S.19.1523","DOIUrl":"https://doi.org/10.33599/NASAMPE/S.19.1523","url":null,"abstract":"The preliminary design and development of an automated ultrasonic scanning system for in-situ composite cure monitoring and defect detection in the high temperature environment of an oven was completed. This preliminary design is a stepping stone to deployment in the high temperature and high pressure environment of an autoclave, the primary cure method of aerospace grade thermoset composites. Cure monitoring with real-time defect detection during the process could determine when defects form and how they move. In addition, real-time defect detection during cure could assist validating physics-based process models for predicting defects at all stages of the cure cycle. A physics-based process model for predicting porosity and fiber waviness originating during cure is currently under development by the NASA Advanced Composites Project (ACP). For the design, an ultrasonic contact scanner is enclosed in an insulating box that is placed inside an oven during cure. Throughout the cure cycle, the box is nitrogen-cooled to approximately room temperature to maintain a standard operating environment for the scanner. The composite part is mounted on the outside of the box in a vacuum bag on the build/tool plate. The build plate is attached to the bottom surface of the box. The scanner inspects the composite panel through the build plate, tracking the movement of defects introduced during layup and searching for new defects that may form during cure. The focus of this paper is the evaluation and selection of the build plate material and thickness. The selection was based on the required operating temperature of the scanner, the cure temperature of the composite material, thermal conductivity models of the candidate build plates, and a series of ultrasonic attenuation tests. This analysis led to the determination that a 63.5 mm thick build plate of borosilicate glass would be utilized for the system. The borosilicate glass plate was selected as the build plate material due to the low ultrasonic attenuation it demonstrated, its ability to efficiently insulate the scanner while supporting an elevated temperature on the part side of the plate, and the availability of a 63.5 mm thick plate without the need for lamination.","PeriodicalId":162077,"journal":{"name":"SAMPE 2019 - Charlotte, NC","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124962860","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}

{"title":"Desmocomp® – Raw Materials for Pultruded Composites with Excellent Chemical and Weathering Resistance","authors":"Chen Liang, James A. Thompson-Colón, D. BushmireAlan, C. Nathan, Danielle K. Williams, R. Meisenheimer, Stamo Mentizi","doi":"10.33599/NASAMPE/S.19.1517","DOIUrl":"https://doi.org/10.33599/NASAMPE/S.19.1517","url":null,"abstract":"","PeriodicalId":162077,"journal":{"name":"SAMPE 2019 - Charlotte, NC","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125044506","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}

{"title":"A Model for Predicting the Cured Part Thickness of Automated Fiber Placed Composites","authors":"M. Kirby, Christopher J. Madsen, D. Říha, C. Palmer, P. Olsen","doi":"10.33599/NASAMPE/S.19.1384","DOIUrl":"https://doi.org/10.33599/NASAMPE/S.19.1384","url":null,"abstract":"","PeriodicalId":162077,"journal":{"name":"SAMPE 2019 - Charlotte, NC","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126188519","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}

{"title":"The Effect of Fabric Architecture on the Processing and Properties of Composites Made By Vacuum Assisted Resin Transfer Molding (VARTM)","authors":"Francois Ntakobatagize, Oscar Ntakontagize, D. Klosterman","doi":"10.33599/NASAMPE/S.19.1586","DOIUrl":"https://doi.org/10.33599/NASAMPE/S.19.1586","url":null,"abstract":"The goal of this research project was to evaluate and compare the effect of fabric architecture on the processing and properties of composites made by Vacuum Assisted Resin Transfer Molding (VARTM). The fabric architectures investigated included plain weave, satin weave, and warpknit unidirectional. The fiber types included E-glass and standard modulus carbon fiber. Flat panels were fabricated with a lab scale VARTM process using an epoxy resin system. Fabric plies were cut to 45 cm x 30 cm (18 in. x 12 in.), and the number of plies used depended on the fiber areal weight of each fabric to produce panels of similar final thickness. The speed of resin infusion was recorded by visually monitoring the flow front which was visible through the bag. Fiber volume fraction was evaluated using thickness measurements, and porosity was investigated via optical microscopy. Mechanical testing was performed via tensile and 3-point flexure. The results showed the fabric type had minimal effect on the infusion speed with the exception of the plain weave and satin weave fiberglass. From the mechanical testing results, there are many comparisons made of the modulus, strength, and strain-to-failure results, for example carbon vs. glass, unidirectional vs. woven, tensile vs. flexure. The rule of mixtures was able to predict some but not all of these properties. The results, which are discussed in detail herein, illustrate the main advantage of selecting carbon vs. glass in stiffness driven applications.","PeriodicalId":162077,"journal":{"name":"SAMPE 2019 - Charlotte, NC","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127123444","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}

{"title":"Microstructure-Sensitive ICME Workflows for Fatigue Critical Applications","authors":"Krzysztof S. Stopka, G. Whelan, D. McDowell","doi":"10.33599/NASAMPE/S.19.1414","DOIUrl":"https://doi.org/10.33599/NASAMPE/S.19.1414","url":null,"abstract":"","PeriodicalId":162077,"journal":{"name":"SAMPE 2019 - Charlotte, NC","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127817884","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}

{"title":"Wafer Scale-Up and Emergence of Ferromagnetism in Superhard Q-Carbon Coatings By Nanosecond Pulsed Laser Irradiation","authors":"Siddharth Gupta, R. Sachan, J. Narayan","doi":"10.33599/NASAMPE/S.19.1395","DOIUrl":"https://doi.org/10.33599/NASAMPE/S.19.1395","url":null,"abstract":"","PeriodicalId":162077,"journal":{"name":"SAMPE 2019 - Charlotte, NC","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128970271","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}

{"title":"Computational Multiscale Analysis for Interlaminar Reinforcement of Composite Laminates with Radially Grown Carbon Nanotube Architecture","authors":"K. Venkatesan, A. Chattopadhyay","doi":"10.33599/NASAMPE/S.19.1545","DOIUrl":"https://doi.org/10.33599/NASAMPE/S.19.1545","url":null,"abstract":"A multiscale modeling framework that integrates nanoscale-informed constitutive models is employed to predict the interlaminar and intralaminar enhancement in composite laminates with radially-grown carbon nanotube (CNT) architecture. The nanoscale-informed constitutive models are implemented using the high-fidelity generalized method of cells (HFGMC) technique accounting for the material constituents and imperfect interfaces at the microscale. The micromechanical model is then coupled with the finite element model of a composite laminate specimen at the macroscale. The developed computational modeling framework is exercised to predict the initiation and steady-state toughness of mode I fracture composite samples. The results obtained from the simulations are correlated to the available experimental data collected from the literature. Conclusions are presented comparing the model response of traditional fiber reinforced polymer (FRP) composite laminates and composites with radially-grown CNT architecture.","PeriodicalId":162077,"journal":{"name":"SAMPE 2019 - Charlotte, NC","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117012661","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}

{"title":"A Simple Analysis Tool to Simulate the Co-cure of Honeycomb Core Composite Sandwich Structures","authors":"N. Kermani, P. Šimáček, S. Advani","doi":"10.33599/NASAMPE/S.19.1432","DOIUrl":"https://doi.org/10.33599/NASAMPE/S.19.1432","url":null,"abstract":"","PeriodicalId":162077,"journal":{"name":"SAMPE 2019 - Charlotte, NC","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117037159","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}

{"title":"Characterizing Thermoset Curing Using Rheology","authors":"Tianhong Chen, B. Rajaram","doi":"10.33599/NASAMPE/S.19.1595","DOIUrl":"https://doi.org/10.33599/NASAMPE/S.19.1595","url":null,"abstract":"","PeriodicalId":162077,"journal":{"name":"SAMPE 2019 - Charlotte, NC","volume":"157 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123048136","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}