SAMPE 2019 - Charlotte, NC最新文献_第3页

Feasibility Study of Novel Magnetic Compaction Force Assisted Additive Manufacturing (MCFA-AM) Methodology for Continuous Carbon Fiber Reinforced Polymer (C-CFRP) Composites 连续碳纤维增强聚合物(C-CFRP)复合材料磁压实力辅助增材制造(MCFA-AM)方法的可行性研究

SAMPE 2019 - Charlotte, NC Pub Date : 2019-04-11 DOI: 10.33599/NASAMPE/S.19.1535

B. Ranabhat, S. Kirmse, K. Hsiao

引用次数: 7

Novel Ultra Low Viscosity Epoxy for Enhancing the Tg and Processability of Multifunctional Thermosets 用于提高多功能热固性材料Tg和加工性的新型超低粘度环氧树脂

SAMPE 2019 - Charlotte, NC Pub Date : 2019-04-11 DOI: 10.33599/NASAMPE/S.19.1453

Huifeng Qian, P. Badrinarayanan

引用次数: 0

Mechanical Characterization of Core Shell Rubber Particles Modified Vinyl Ester and Glass Fiber Reinforced Composites 核壳橡胶颗粒改性乙烯基酯和玻璃纤维增强复合材料的力学性能

SAMPE 2019 - Charlotte, NC Pub Date : 2019-04-11 DOI: 10.33599/NASAMPE/S.19.1450

S. Shree, J. Tate

引用次数: 0

Development of Scalable Dynamic Control Architectures for Flexible Composites Manufacturing Work Cells 柔性复合材料制造工作单元可扩展动态控制体系结构的开发

SAMPE 2019 - Charlotte, NC Pub Date : 2019-04-11 DOI: 10.33599/NASAMPE/S.19.1391

S. Shewchuk, B. Halford, M. Matlack, A. Sharpe, Pete Massey

引用次数: 1

Fabrication of a Complex Part with Deep-Draw Sections By Resin Transfer Molding 用树脂传递模塑制造具有深拉截面的复杂零件

SAMPE 2019 - Charlotte, NC Pub Date : 2019-04-11 DOI: 10.33599/NASAMPE/S.19.1389

T. Tsotsis, Gilbert Cespedes-Gonzalez, M. Wiener, Leslie A. Cohen, D. Calamito, S. Costantino, F. Klunker

引用次数: 0

Nano-Ceramic Modified Polymer Matrix Glass Composites for Impact Applications 纳米陶瓷改性聚合物基玻璃复合材料的冲击应用

SAMPE 2019 - Charlotte, NC Pub Date : 2019-04-11 DOI: 10.33599/NASAMPE/S.19.1578

H. Kallagunta, J. Tate

引用次数: 0

Design for Manufacturing: Laminate Focused Design and Analysis Tools for Automated Composites Manufacturing 面向制造的设计:自动化复合材料制造的层压板设计和分析工具

SAMPE 2019 - Charlotte, NC Pub Date : 2019-04-11 DOI: 10.33599/NASAMPE/S.19.1478

D MooreJeron, André Colvin, S. Ghose, A JohnsonBrice

引用次数: 2

Uncovering Non-Obvious Variables in Surface Preparation Processes for Bonding and Coating 揭示粘接和涂层表面制备过程中的非明显变量

SAMPE 2019 - Charlotte, NC Pub Date : 2019-04-11 DOI: 10.33599/NASAMPE/S.19.1448

R. Dillingham

引用次数: 0

A Numerical and Experimental Approach for Modeling Porosity Due to Entrapped Air and Volatiles Off-gassing During Manufacturing of Composite Structures 一种模拟复合材料结构制造过程中因夹持空气和挥发物逸出而导致孔隙度的数值和实验方法

SAMPE 2019 - Charlotte, NC Pub Date : 2019-04-11 DOI: 10.33599/NASAMPE/S.19.1627

Curtis Hickmott, A. Forghani, Victoria Hutten, Evan Lorbiecki, F. Palmieri, B. Grimsley, B. Coxon, G. Fernlund, A. Poursartip

{"title":"A Numerical and Experimental Approach for Modeling Porosity Due to Entrapped Air and Volatiles Off-gassing During Manufacturing of Composite Structures","authors":"Curtis Hickmott, A. Forghani, Victoria Hutten, Evan Lorbiecki, F. Palmieri, B. Grimsley, B. Coxon, G. Fernlund, A. Poursartip","doi":"10.33599/NASAMPE/S.19.1627","DOIUrl":"https://doi.org/10.33599/NASAMPE/S.19.1627","url":null,"abstract":"High performance composite structures have strict requirements regarding acceptable levels of porosity. The impact can be significant on mechanical performance and mitigating the growth of voids can be a challenge given the complexity of the problem. The evolution of porosity can be summarized as a balance between sources and sinks which determine void growth or shrinkage. The primary sources of void growth include bag leaks, entrapped air in the system, off-gassing of volatiles, and cure shrinkage. Mechanisms which mitigate porosity include removal of air from the system and maintaining sufficient resin pressure during the process to keep volatiles in solution. In this paper, an approach for modeling the evolution of voids due to entrapped air and volatiles is presented. It has been shown in previous experimental studies that decreases in local resin pressure are linked to a higher likelihood of porosity formation. Results of the study are compared to experiments in which the local resin pressure was measured and micrographs of the panels were taken to characterize the porosity.","PeriodicalId":162077,"journal":{"name":"SAMPE 2019 - Charlotte, NC","volume":"8 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":"114492454","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: 0

Evaluation of an Alternate Method for Determining Yield Strength Offset Values for Selective Laser Sintered Polymeric Materials 一种测定选择性激光烧结聚合物材料屈服强度偏移值的替代方法的评价

SAMPE 2019 - Charlotte, NC Pub Date : 2019-04-11 DOI: 10.33599/NASAMPE/S.19.1583

C. Henry, K. Rupel, Charles Park, Joseph A. Costanzo, Cary Kaczowka, Kevin F. Malik, S. Ghose

{"title":"Evaluation of an Alternate Method for Determining Yield Strength Offset Values for Selective Laser Sintered Polymeric Materials","authors":"C. Henry, K. Rupel, Charles Park, Joseph A. Costanzo, Cary Kaczowka, Kevin F. Malik, S. Ghose","doi":"10.33599/NASAMPE/S.19.1583","DOIUrl":"https://doi.org/10.33599/NASAMPE/S.19.1583","url":null,"abstract":"Due to the unique characteristics of Additively Manufactured (AM) polymeric materials, typical mechanical strength characterization methods such as those commonly used for traditionally-processed polymers or composite materials can produce results that do not accurately represent material capabilities. In order to characterize mechanical properties of these materials, new test and analysis methods are required. As part of the National Aeronautics and Space Administration (NASA) Advanced Composites Project (ACP), Boeing has evaluated true yield testing as an alternative or complimentary test to 0.2% offset yield testing for determining appropriate yield strength values of polymer materials. Previous testing has shown high strain, low modulus polymer materials such as selective laser sintered (SLS) Nylon 11 at elevated temperatures produce large variations in yield strength. The true yield test method was successful in finding the applied strain level when yield commences and appears to offer an increase in data robustness. The material contained in this paper is based upon work supported by NASA under award No. NNL09AA00A through a sub award from the National Institute of Aerospace.","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":"117084923","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: 3