Ford's answers to the NHTSA 6.7 Investigation
There was a request for a link to Ford's answer's to the NHTSA investigation posted on a previous thread, since closed. Here is the link: Ford's NHTSA Answers to the 6.7 investigation This PDF i...
Forum Discussion
Update:
I am reviewing several state of the art Finite Modeling Analysis (FEA) tools, including one called Abaqus that is part of the Simula suite of tools.
http://www.3ds.com/products/simulia/portfolio/
Presumably, the pump was designed using a comparable set of tools or the same one.
Interesting the limitations of the FEA tools and how difficult it is to include Computational Fluid Dynamics (CFD) into it.
The gist is that operator skill and expertise is really critical to use the FEA tools, including fitting the mesh properly and then making certain judgments --- like where to put in a "flaw" so the parts bend right.
A question I have right off the bat is how a coating is modeled when it is so thin and the properties of the coating / underlying material may not be well characterized.
A very fine FEA mesh at the points of maximum expected stress need to be done, and the forces on it simulated.
A problem arise that the expected maximum stress locations may be quite different from the actual places --- when cavitation and hydraulic events are included, or the existence of particles.. contaminants... like water.
Don't know when I get my CFD simulation tool grand tour, to see what the limitations of that set of techniques are.
I am reviewing several state of the art Finite Modeling Analysis (FEA) tools, including one called Abaqus that is part of the Simula suite of tools.
http://www.3ds.com/products/simulia/portfolio/
Presumably, the pump was designed using a comparable set of tools or the same one.
Interesting the limitations of the FEA tools and how difficult it is to include Computational Fluid Dynamics (CFD) into it.
The gist is that operator skill and expertise is really critical to use the FEA tools, including fitting the mesh properly and then making certain judgments --- like where to put in a "flaw" so the parts bend right.
A question I have right off the bat is how a coating is modeled when it is so thin and the properties of the coating / underlying material may not be well characterized.
A very fine FEA mesh at the points of maximum expected stress need to be done, and the forces on it simulated.
A problem arise that the expected maximum stress locations may be quite different from the actual places --- when cavitation and hydraulic events are included, or the existence of particles.. contaminants... like water.
Don't know when I get my CFD simulation tool grand tour, to see what the limitations of that set of techniques are.
