SAE J3168: A Joint Aerospace-Automotive Recommended Practice for Reliability Physics Analysis of Electrical, Electronic, and Electromechanical (EEE) Components 2019-01-1252
This paper describes a joint aerospace/automotive SAE Recommended Practice to standardize a process for Reliability Physics Analysis (RPA).
The aerospace and automotive electronics industries have many common characteristics, including rugged operating and environmental conditions, long operating lifetimes, strict configuration control requirements, high consequences of failure, and the need to demonstrate reliability and durability prior to going into service. Despite these similarities, the two industries have not typically worked together on common approaches to assure the integrity of EEE components and systems. The development of a common SAE Recommended Practice for Reliability Physics Analysis (RPA), therefore, represents one of the first efforts toward a common approach to a common issue.
RPA, previously known as Physics-of-Failure (PoF) analysis, is a science-based method to estimate the likelihood of failure of EEE components, due to stresses such as mechanical shock, vibration, temperature cycling, etc., based on understanding of stress driven damage accumulation. Recently, RPA has gained significant recognition within the aerospace and automotive electronics industries.
RPA results can be used for multiple purposes, including:
• Inputs to reliability, durability, safety, and certification analyses of electronic equipment and systems;
• Data for qualification of EEE components, modules, equipment, and systems;
• Design analyses;
• Test design and results interpretation; and
There are many possible approaches to the application of RPA to automotive and aerospace, and as its use proliferates, so does the potential for confusion. Therefore, this Recommended Practice has been developed to “standardize” the RPA process.
Lloyd Condra, James McLeish, Keith Hodgson, David Locker
DfR Solutions, Design For Reliablity Solutions, Ford Motor Company, US Army