Minutes for 27 March 1995 SAE-RLDA Division Progress Meeting

Status reports:

Rainflow Format Standard is still in the approval process. Time history survey is still in process.

R. Mousseau and S. Haeg presented "An Evaluation of Multibody Dynamics Codes for Generating Durability Loads" which concluded with a proposed plan to evaluate the ability of these codes to generate durability loads.

D. Morrow, R. Thompson and C. Sieck presented various approaches to evaluating multi-pass road load data.

Minutes for 28 March 1995 SAE-RLDA Planning Session

In attendance: D. Morrow, A. Conle, J. Bonnen, C. Sieck, K. Donaldson, G. Leese, R. Thompson, D. Klann, S. Haeg, R. Hartline, T. Barton, G. Mauritzson, R. Mousseau, P. Swanson, S. Downing, P. Merfeld

The following topics were discussed at the planning session.

1) Data Interface Formats

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Rainflow data format is still in the process of being approved.

Time history data file formats: K. Donaldson described MTS's RPCIII file format and offered to allow this file format to be distributed as a starting point for developing a time history standard.

S. Downing described the open-ended generalized tensor format of SoMat's SIF files and suggested that this should also be considered as a time history format.

Discussion followed about what types of data should be accommodated in the data stream.

A. Conle suggested posting sample files to the FD&E Web.

2) Multi-Body Dynamics

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R. Mousseau presented his Matrix of Involvement to which he suggested members add tasks that made sense and that they are willing to sign up for. So far Ford, MTS and Tacom are the only contributors signed up on this matrix.

It was suggested that multiple solvers be used during this study (i.e. Adams, Dads, etc.)

K. Donaldson suggested that a bushing manufacturer be pursued for support of the project and that he could bring this up at the upcoming MTS elastomer users group meeting.

3) Statistics In Road Load Data

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 S. Haeg suggested a review of a publication in his RPC users group by Malcom Sharp of SK on proving ground variability. Discussion followed on what was important for fatigue calculations.

L. Tucker suggested that you should design to high end loading since the design is controlled by upper load levels. Some debate followed about whether the distribution of loading was needed.

R. Hartline asked, How long do we need to measure something to find a realistic history? No conclusions were arrived at.

4) Meeting is adjourned