NASA SBIR 2004 Solicitation

FORM B - PROPOSAL SUMMARY


PROPOSAL NUMBER: 04 A2.05-9466
SUBTOPIC TITLE: Revolutionary Materials and Structures Technology for Propulsion and Power Components
PROPOSAL TITLE: Physics-Based Probabilistic Design Tool with System-Level Reliability Constraint

SMALL BUSINESS CONCERN (Name, E-mail, Mail Address, City/State/Zip, Phone)
N&R ENGINEERING
6659 Pearl Road. #400
Parma Heights, OH 44130-3821
(440)845-7020

PRINCIPAL INVESTIGATOR/PROJECT MANAGER (Name, E-mail, Mail Address, City/State/Zip, Phone)
William Strack
bstrack@wowway.com
6659 Pearl Road. #400
Parma Heights, OH 44130-3821
(440)845-7020

TECHNICAL ABSTRACT (LIMIT 200 WORDS)
The work proposed herein would establish a concurrent design environment that enables aerospace hardware designers to rapidly determine optimum risk-constrained designs subject to multiple uncertainties in applied loads, material properties, and manufacturing processes. This means that the design process no longer would consist of a sequence of separate code invocations to: (1) obtain the geometry model, (2) determine the various loads, (3) determine performance, (4) perform a structural analysis, (5) perform design optimization, and (6) perform a probabilistic risk assessment. Instead, all of these functions would be automatically incorporated into a single framework using existing physics-based deterministic modeling codes and a set of computer-generated data transfer interfaces. Thus, a design engineer would be able to rapidly explore the design space to identify the minimum weight design that meets a given reliability constraint ? thereby avoiding both an overly conservative design and a too-risky design. For example, the software tools that implement this innovation could be used to determine the wall thickness of a launch vehicle's external cryogenic propellant tanks exposed to high but uncertain thermal and aerodynamic loads and with a reliability probability of 0.99999.

POTENTIAL NASA COMMERCIAL APPLICATIONS (LIMIT 100 WORDS)
The work proposed herein would establish a concurrent design environment that enables aerospace hardware designers to rapidly determine optimum risk-constrained designs subject to multiple uncertainties in applied loads, material properties, and manufacturing processes. This means that the design process no longer would consist of a sequence of separate code invocations to: (1) obtain the geometry model, (2) determine the various loads, (3) determine performance, (4) perform a structural analysis, (5) perform design optimization, and (6) perform a probabilistic risk assessment. Instead, all of these functions would be automatically incorporated into a single framework using existing physics-based deterministic modeling codes and a set of computer-generated data transfer interfaces. Thus, a design engineer would be able to rapidly explore the design space to identify the minimum weight design that meets a given reliability constraint ? thereby avoiding both an overly conservative design and a too-risky design. For example, the software tools that implement this innovation could be used to determine the wall thickness of a launch vehicle's external cryogenic propellant tanks exposed to high but uncertain thermal and aerodynamic loads and with a reliability probability of 0.99999.

POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (LIMIT 100 WORDS)
A fundamental architectural change in the design process is proposed that could revolutionize the ways many commercial designs are conducted that involve advanced technology and important uncertainties. For example, high-tech applications such as jet engines, central powerplants, artificial hearts, flight-qualified control system actuators, home heat pumps/air conditioners, automotive engines, and avionic circuit boards all require ultra-reliable, minimal-maintenance operation. Some of these operate in uncertain hostile environments and all involve a continuous stream of technical improvements with inherent uncertainties.