Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Brian W. Grimsley"'
Autor:
Brian W. Grimsley, Frank L. Palmieri, Göran Fernlund, Anoush Poursartip, Victoria Hutten, Alireza Forghani, Curtis Hickmott, Evan Lorbiecki, Brian Coxon
Publikováno v:
SAMPE 2019 - Charlotte, NC.
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.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::97437f57b6d7d7c0c18d9ef38d084710
https://doi.org/10.33599/nasampe/s.19.1627
https://doi.org/10.33599/nasampe/s.19.1627
A Validation Study of a Physics-based Tack Model for an Automated Fiber Placement Process Simulation
Autor:
Anoush Poursartip, Curtis Hickmott, Paulo Silva, Christopher J. Wohl, Brian W. Grimsley, Victoria Hutten, Brian Coxon, Alireza Forghani, Thammaia Sreekantamurthy
Publikováno v:
SAMPE 2019 - Charlotte, NC.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8b199a5a6d3e8bc90636cdc72c1f6b44
https://doi.org/10.33599/nasampe/s.19.1512
https://doi.org/10.33599/nasampe/s.19.1512
Publikováno v:
Structural Health Monitoring. 16:164-173
This study exploits the feasibility of imaging zones of local porosity/voids simulated by introducing microspheres during layup of a unidirectional carbon fiber–reinforced polymer composite panel. A fully non-contact hybrid system primarily compose
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2969d3031e337c5e47718b999aeabb52
https://doi.org/10.1177/1475921716668843
https://doi.org/10.1177/1475921716668843
Autor:
Christopher J. Wohl, Curtis Hickmott, Brian W. Grimsley, Alireza Forghani, Brian Coxon, Houman Bedayat, Anoush Poursartip
Publikováno v:
American Society for Composites 2017.
Wrinkles, puckers and fiber bridging are among the major issues encountered in Automated Fiber Placement (AFP) process. These defects are all different manifestations of fiber misalignment. Residual stresses introduced in the tow during the depositio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ffebac18e475f2aae41f4943c9ac712
https://doi.org/10.12783/asc2017/15214
https://doi.org/10.12783/asc2017/15214
Autor:
Göran Fernlund, Brian Coxon, Frank L. Palmieri, Brian W. Grimsley, Alireza Forghani, Houman Bedayat, Martin Roy, Curtis Hickmott, Anoush Poursartip
Publikováno v:
American Society for Composites 2017.
Porosity, as a manufacturing process-induced defect, highly affects the mechanical properties of cured composites. There are several contributing factors to the formation of porosity in composite structures, most notably entrapped air, bag leaks, and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d84f4ff6cc6b822288cb9dedfeeef53
https://doi.org/10.12783/asc2017/15212
https://doi.org/10.12783/asc2017/15212
Autor:
Hyunchul Kim, Chetan M. Kumar, Dong W. Kim, Jessica A. Weninger, Hazel B. Tejada, Aparna Prasad, Brian W. Grimsley, Pilin Liu, Daewoong Suh
Publikováno v:
Materials Science and Engineering: A. :595-603
Effects of Ag content on fracture resistance of Sn–Ag–Cu solders under high-strain rate conditions are examined in an attempt to optimize bulk properties of solders for enhanced drop performance. The concept of extrinsic toughening is invoked for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c6c1934122ad477c1a951b54b897cb47
https://doi.org/10.1016/j.msea.2007.01.145
https://doi.org/10.1016/j.msea.2007.01.145
Autor:
James R. Brenner, Erik S. Weiser, James E. Fesmire, Brian W. Grimsley, Trent M. Smith, Martha K. Williams, Gordon L. Nelson
Publikováno v:
Polymers for Advanced Technologies. 16:167-174
Activity at the NASA Langley Research Center (LaRC) has focused on developing low density polyimide foam and foam structures which are made using monomeric solutions or salt solutions formed from the reaction of a dianhydride and diamine dissolved in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::632e513052a4994bfe67263fb1224c31
https://doi.org/10.1002/pat.567
https://doi.org/10.1002/pat.567
Publikováno v:
Journal of Reinforced Plastics and Composites. 23:1741-1754
The use of piezoelectric ceramic materials for structural actuation is a fairly welldeveloped practice that has found use in a wide variety of applications. However, just as advanced composites offer many benefits over traditional engineering materia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9cc091ef47ac4f1d8f05c6c889b3f8b3
https://doi.org/10.1177/0731684404040171
https://doi.org/10.1177/0731684404040171
Autor:
Yoshiaki Echigo, Theodore F. Johnson, Brian W. Grimsley, Terry L. St. Clair, Hisayasu Kaneshiro, Erik S. Weiser
Publikováno v:
High Performance Polymers. 12:1-12
Due to a demand by the aerospace industry, NASA has begun developing the next generation of polyimide foams which could be utilized to reduce vehicle weight for the X-33 and Reusable Launch Vehicle (RLV) programmes. The activity at NASA Langley Resea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b728df97b210de7fd189fef9025f2d57
https://doi.org/10.1088/0954-0083/12/1/301
https://doi.org/10.1088/0954-0083/12/1/301
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