| NSF Org: |
CMMI Division of Civil, Mechanical, and Manufacturing Innovation |
| Recipient: |
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| Initial Amendment Date: | March 6, 2014 |
| Latest Amendment Date: | March 6, 2014 |
| Award Number: | 1437449 |
| Award Instrument: | Standard Grant |
| Program Manager: |
Kara Peters
CMMI Division of Civil, Mechanical, and Manufacturing Innovation ENG Directorate for Engineering |
| Start Date: | September 23, 2013 |
| End Date: | August 31, 2016 (Estimated) |
| Total Intended Award Amount: | $182,715.00 |
| Total Awarded Amount to Date: | $182,715.00 |
| Funds Obligated to Date: |
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| History of Investigator: |
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| Recipient Sponsored Research Office: |
W5510 FRANKS MELVILLE MEMORIAL LIBRARY STONY BROOK NY US 11794-0001 (631)632-9949 |
| Sponsor Congressional District: |
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| Primary Place of Performance: |
NY US 11794-3362 |
| Primary Place of
Performance Congressional District: |
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| Unique Entity Identifier (UEI): |
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| Parent UEI: |
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| NSF Program(s): |
MATERIALS PROCESSING AND MANFG, Mechanics of Materials and Str |
| Primary Program Source: |
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| Program Reference Code(s): |
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| Program Element Code(s): |
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| Award Agency Code: | 4900 |
| Fund Agency Code: | 4900 |
| Assistance Listing Number(s): | 47.041 |
ABSTRACT
The research objective of this award is to study high-performance carbon-polymer periodic interpenetrating phase composites (IPCs) with enhanced mechanical properties (including stiffness, strength, impact resistance, toughness, energy dissipation, and damage tolerance) through an integrated approach combining design, fabrication, analysis and experiment. Geometries based on triply periodic minimal surfaces and 3-D microtrusses will be used to optimally design microstructures of the IPCs, and 3-D direct-write printing technologies will be employed to fabricate them. Analytical and computational micromechanics models will be developed to simulate the IPCs, and various tests will be conducted to characterize the fabricated IPCs and to validate the models. It is anticipated that the findings of this research will provide guidelines for engineering and tailoring IPCs to achieve optimized properties.
The successful completion of the research will lead to new structure-property-function relationships needed for achieving new and improved mechanical properties of IPCs, thereby significantly improving our current understanding of IPCs with enhanced mechanical performance. The project will provide a demonstration of the modern concept of materials-by-design. It will offer an example of futuristic composite material technology. The research methodology, tools, and results generated in this project will be documented and used to improve both undergraduate and graduate curricula, which will enable engineering students to access cutting-edge research facilities and acquire new knowledge. The integrated educational plan will greatly enhance the students' learning experience, challenge their intellectual curiosity and motivate them to pursue careers in research and education. New findings will be made available on the Internet and to K-12 students through outreach activities.
PUBLICATIONS PRODUCED AS A RESULT OF THIS RESEARCH
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PROJECT OUTCOMES REPORT
Disclaimer
This Project Outcomes Report for the General Public is displayed verbatim as submitted by the Principal Investigator (PI) for this award. Any opinions, findings, and conclusions or recommendations expressed in this Report are those of the PI and do not necessarily reflect the views of the National Science Foundation; NSF has not approved or endorsed its content.
Composite materials have found important applications in aerospace, automotive, defense, and energy industries. Interpenetrating phase composites, also known as co-continuous composites, have been proposed to improve the dispersion and to increase the volume fraction of reinforcing phase in composite materials. The objective of this research is to develop high-performance polymer interpenetrating phase composites. We aim to understand the structure-property-function relationships needed for achieving desired mechanical properties, including stiffness, strength, toughness, energy dissipation, and damage tolerance of interpenetrating phase composite materials.
With the support of this NSF grant, we have developed a novel framework with integrated design, fabrication, analysis, and testing for design of new advanced materials for potential broad applications. (1) Composites with two types of micro structures have been designed based on triply periodic minimal surfaces and 3D rod-connected micro-trusses. Several microstructures which correspond to the level set structures, as well as the octet-truss lattice structures are considered and generated, where the volume fraction can be precisely defined. (2) Analytical and computational micromechanics models have been developed to predict the mechanical properties and to optimize design geometry parameters. The finite element-based computational micromechanics models is used to predict the Young’s modulus, yield strength, and energy dissipation of each interpenetrating phase composite. Effects of different constituent material combinations are considered: i) polymer (A)/elastomer, ii) polymer (A)/polymer (B), iii) polymer(A)/metal (or ceramic), iv) polymer/liquid, and v) polymer/air. The enhancement of stiffness, strength, and energy absorption for interpenetrating phase composites have been predicted. (3) Prototype interpenetrating phase composites have been fabricated using state-of-the-art 3D printing technique. Glassy polymer/rubber and carbonized polymer/rubber composite are considered. A new method utilizing level set equations have been employed to generate geometrical models for interpenetrating phase composites, which includes surface node generation, surface mesh generation, solid construction generation, and unit cell generation. (4) Various mechanical tests have been performed on the 3D-printed prototype interpenetrating phase composites, including tension, compression, three-point bending, and dynamic impact. The experimental results are used to validate the modeling and analysis. The research findings of this project have been reported in 12 journal publications and 18 conference presentations at national and international conferences.
This award has broader impacts in education and outreach. The research findings of this project have been incorporated in the curricula at Stony Brook University and benefit both undergraduate and graduate teaching. Four graduate students (2 Ph.D. and 2 M.S.) at Stony Brook University have been trained while working on the project. In order to integrate diversity into the proposed research and education programs, special efforts have been made to recruit and retain students from underrepresented groups in engineering, including women and minorities. The PI has actively partnered with the Women in Science and Engineering (WISE) Program at Stony Brook University, which is designed to increase the numbers of traditionally underrepresented minority students who pursue degrees in Science, Technology, Engineering, and Mathematics (STEM) majors. Research opportunities have been offered to motivated undergraduate students. The PI has also collaborated with local high schools in long island, NY area. Four K-12 students have been actively involved in the research activities on this project and the outcomes have been presented at various science competitions and science fairs. The results from the project have also been broadly disseminated to the academic community and general public through meetings, conferences, and internet tools.
Last Modified: 11/14/2016
Modified by: Lifeng Wang
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