NASA STTR 2017 Solicitation


PROPOSAL NUMBER: 171 T12.03-9812
RESEARCH SUBTOPIC TITLE: Thin-Ply Composites Design Technology and Applications
PROPOSAL TITLE: Mechanism Based Damage Model for Linerless Thin-Ply Composite Pressure Vessels

NAME: Materials Research and Design, Inc. NAME: University of Dayton Research Institute
STREET: 300 East Swedesford Road STREET: 300 College Park
CITY: Wayne CITY: Dayton
STATE/ZIP: PA  19087 - 1858 STATE/ZIP: OH  45469 - 0101
PHONE: (610) 964-9000 PHONE: (937) 229-4704

PRINCIPAL INVESTIGATOR/PROJECT MANAGER (Name, E-mail, Mail Address, City/State/Zip, Phone)
Daniel Hladio
300 E. Swedesford Road
Wayne, PA 19087 - 1858
(610) 964-9000

CORPORATE/BUSINESS OFFICIAL (Name, E-mail, Mail Address, City/State/Zip, Phone)
Kerry Howern
300 E. Swedesford Road
Wayne, PA 19087 - 1858
(610) 964-9000 Extension :110

Estimated Technology Readiness Level (TRL) at beginning and end of contract:
Begin: 1
End: 3

Technology Available (TAV) Subtopics
Thin-Ply Composites Design Technology and Applications is a Technology Available (TAV) subtopic that includes NASA Intellectual Property (IP). Do you plan to use the NASA IP under the award?

TECHNICAL ABSTRACT (Limit 2000 characters, approximately 200 words)
Thin-ply composites are being considered by NASA for space exploration applications, where the suppression of microcracks could give rise to linerless cryogenic tanks. In this proposed Phase I STTR effort, material testing coupled with health monitoring techniques will be used to quantify damage accumulation within composite materials, both standard ply thickness and of the thin-ply design. A multi-scale physics based approach, verified with empirical data, will be used to develop a design tool capable of predicting the useable life of a composite structure subjected to cyclic loads.

A fracture mechanics based model in a multi-scale framework is proposed as a design tool for modeling thin-ply laminates. The key variable of the model, the microcracking critical energy release rate (CERR), is to be calibrated to quasi-static and fatigue testing. Acoustic emission (AE) monitoring will be used to quantify the crack density as a function of load history. The model will be interrogated with CERRs to best match the crack density as a function of load observed during the experiments. If the CERR is indeed a material property, the same value should exist regardless of ply thickness and fiber architecture. The design tool will include a stand-alone program to perform this calibration of the CERR for cross-ply laminates. Additionally, a User Material (UMAT) will be written to link the microcracking model to a structural level model in a commercial finite element code.

POTENTIAL NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
The program will directly benefit the advancement towards linerless cryogenic tanks for space exploration applications. Structural components in both manned and unmanned vehicles will benefit from the thin-ply composites by increasing design allowables resulting in thinner and lighter structures. Additionally, Structural Health Monitoring Systems (SHMS) and Health and Usage Monitoring Systems (HUMS) are both technologies that aim to improve component life prediction through the analysis of operational data collected by sensors. The correlation between AE signal accumulation and crack density within composite parts is a powerful tool for any industry currently using composite materials. This technology can give real time information regarding the health of the composite part, allowing for efficient servicing and/or replacement of parts.

POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
Any industry utilizing composite materials can benefit from the advancement of thin-ply composites, which includes the automotive industry, fixed-wing aircraft, rotorcraft, industrial pressure vessels, and recreational sports equipment. Benchmarking the relationship between acoustic emissions and composite damage enables Structural Health Monitoring Systems for any application where safety is of a concern (i.e. commercial aircraft).

TECHNOLOGY TAXONOMY MAPPING (NASA's technology taxonomy has been developed by the SBIR-STTR program to disseminate awareness of proposed and awarded R/R&D in the agency. It is a listing of over 100 technologies, sorted into broad categories, of interest to NASA.)
Lifetime Testing
Models & Simulations (see also Testing & Evaluation)
Nondestructive Evaluation (NDE; NDT)
Simulation & Modeling
Software Tools (Analysis, Design)

Form Generated on 04-19-17 12:45