{"title":"Fast Vs Tough; the Effect of Faster Cure Cycles on the Fracture Properties of Toughened Epoxies","authors":"D. Incerti, D. Carolan, A. Fergusson","doi":"10.33599/NASAMPE/S.19.1491","DOIUrl":"https://doi.org/10.33599/NASAMPE/S.19.1491","url":null,"abstract":"","PeriodicalId":162077,"journal":{"name":"SAMPE 2019 - Charlotte, NC","volume":"407 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":"123533368","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}
Z. Hasan, J. Rader, Delphine Turpin, A. Olson, Ryan St Onge, Jon Amback
{"title":"Analysis and Fabrication of Thick Co-Cured Composite Structures","authors":"Z. Hasan, J. Rader, Delphine Turpin, A. Olson, Ryan St Onge, Jon Amback","doi":"10.33599/NASAMPE/S.19.1580","DOIUrl":"https://doi.org/10.33599/NASAMPE/S.19.1580","url":null,"abstract":"","PeriodicalId":162077,"journal":{"name":"SAMPE 2019 - Charlotte, NC","volume":"57 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":"121969183","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}
J. Deitzel, M. Kubota, J. Gillespie, Z. Hinton, Lavenia J Thursch, N. Alvarez, G. Palmese, Jacob J. Fallon, M. Bortner, R. Zhang, R. Joseph, T. Schumaker, J. Riffle, Sam Lukubira, S. Kanhere, M. Tang, A. Ogale
{"title":"Surface Treatment of TUFF Pitch-Based Carbon Fiber for Adhesion Promotion in High TG Thermoplastic Composites","authors":"J. Deitzel, M. Kubota, J. Gillespie, Z. Hinton, Lavenia J Thursch, N. Alvarez, G. Palmese, Jacob J. Fallon, M. Bortner, R. Zhang, R. Joseph, T. Schumaker, J. Riffle, Sam Lukubira, S. Kanhere, M. Tang, A. Ogale","doi":"10.33599/NASAMPE/S.19.1613","DOIUrl":"https://doi.org/10.33599/NASAMPE/S.19.1613","url":null,"abstract":"","PeriodicalId":162077,"journal":{"name":"SAMPE 2019 - Charlotte, NC","volume":"350 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":"122166330","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}
S. Romberg, C. Hershey, J. Lindahl, W. Carter, B. Compton, V. Kunc
{"title":"Large-scale Additive Manufacturing of Highly Exothermic Reactive Polymer Systems","authors":"S. Romberg, C. Hershey, J. Lindahl, W. Carter, B. Compton, V. Kunc","doi":"10.33599/NASAMPE/S.19.1616","DOIUrl":"https://doi.org/10.33599/NASAMPE/S.19.1616","url":null,"abstract":"Additive manufacturing (AM) of reactive polymer systems involves the deposition of materials at room temperature that either cure during printing through a chemically initiated reaction or require thermal initiation after printing. This presentation focuses on large-scale AM of chemically initiated thermosetting resins to characterize the effects of heat generation, temperature-dependent viscoelasticity, and crosslinking on the printing process. Real-time tracking of both temperature and cure fronts during the build process were investigated using infrared (IR) and optical vision systems in combination with selected material dyes. Heat generation within the previouslydeposited layers was observed to cause significant reduction in the storage modulus (G’) and viscosity of newly-deposited layers, resulting in bead instabilities and failure of the print. Quantitative experimental observations on thin-wall structures suggest strategies for mitigating this failure mode through selection of print parameters and tailoring of viscoelastic properties of the feedstock resin.","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":"130320445","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}
T. Centea, P. Šimáček, M. Anders, N. Kermani, D. Zebrine, S. Advani, S. Nutt
{"title":"Understanding and Modeling the Co-cure of Honeycomb Core Sandwich Structures","authors":"T. Centea, P. Šimáček, M. Anders, N. Kermani, D. Zebrine, S. Advani, S. Nutt","doi":"10.33599/NASAMPE/S.19.1431","DOIUrl":"https://doi.org/10.33599/NASAMPE/S.19.1431","url":null,"abstract":"","PeriodicalId":162077,"journal":{"name":"SAMPE 2019 - Charlotte, NC","volume":"10 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":"116035168","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}
S. Yarlagadda, J. Deitzel, D. Heider, J. Tierney, J. Gillespie
{"title":"Tailorable Universal Feedstock for Forming (TUFF): Overview and Performance","authors":"S. Yarlagadda, J. Deitzel, D. Heider, J. Tierney, J. Gillespie","doi":"10.33599/NASAMPE/S.19.1605","DOIUrl":"https://doi.org/10.33599/NASAMPE/S.19.1605","url":null,"abstract":"","PeriodicalId":162077,"journal":{"name":"SAMPE 2019 - Charlotte, NC","volume":"88 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":"114627787","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}
R. Harik, J. Halbritter, D. Jegley, R. Grenoble, B. Mason
{"title":"Automated Fiber Placement of Composite Wind Tunnel Blades: Process Planning and Manufacturing","authors":"R. Harik, J. Halbritter, D. Jegley, R. Grenoble, B. Mason","doi":"10.33599/NASAMPE/S.19.1538","DOIUrl":"https://doi.org/10.33599/NASAMPE/S.19.1538","url":null,"abstract":"The ability to accurately manufacture large complex shapes in a consistent and repeatable manner has led to Automated Fiber Placement (AFP) being the predominant mode of manufacturing for large composite aerospace structures today. Currently, AFP is being considered for mediumand small-scale parts. Composite wind tunnel blades have traditionally been fabricated by hand layup for pre-impregnated or dry fabrics with resin infusion. Though well proven, the traditional fabrication method is laborious and tedious, and hence expensive. The project described in this paper used the Integral Structural Assembly of Advanced Composites (ISAAC) facility at the NASA Langley Research Center to build a manufacturing demonstration unit (MDU) with a shape representative of a wind tunnel blade. This MDU is used to discuss tooling, process planning, and fabrication. Additionally, details of the generic manufacturing workflow are presented.","PeriodicalId":162077,"journal":{"name":"SAMPE 2019 - Charlotte, NC","volume":"79 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":"134032334","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":"Investigation of Process Variation Effects Via a Homogeneous 3-Dimensional Tensile Test Coupon in Polyjet 3D Additive Printing","authors":"R. Tomar, F. Ulu, R. Mohan, A. Kelkar","doi":"10.33599/NASAMPE/S.19.1546","DOIUrl":"https://doi.org/10.33599/NASAMPE/S.19.1546","url":null,"abstract":"","PeriodicalId":162077,"journal":{"name":"SAMPE 2019 - Charlotte, NC","volume":"10 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":"123637963","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}