Abstract
One of the greatest challenges to the optimization of assembled systems is a lack of understanding of how jointed interfaces augment system dynamics. Thus, a design tool that can assess the nonlinearity of a joint prior to manufacturing and experimentation will lead to significant savings in qualification testing and improved performance in terms of dynamic properties and failure rates. This paper explores the a priori metric hypothesis for jointed structures, which states that the strength of a nonlinearity (SNL) can be estimated by a metric derived from both the magnitude and uniformity of contact pressure within an interface and the modal strain energy at an interface’s location.
Sandia National Laboratories is a multimission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC., a wholly owned subsidiary of Honeywell International, Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA-0003525.
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Notes
- 1.
μ ε = Mean strain, σ ε = Standard deviation of strain, σ CP = Standard deviation of contact pressure, A CP = Area of contact pressure, γ 1ε = Skewness of strain, β 2ε = Kurtosis of strain
References
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Acknowledgments
This research was conducted at the 2018 Nonlinear Mechanics and Dynamics (NOMAD) Research Institute supported by Sandia National Laboratories. Sandia National Laboratories is a multi-mission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC., a wholly owned subsidiary of Honeywell International, Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA-0003525. The authors would also like to thank Bill Flynn from Siemens Industry Software NV for supplying the data acquisition and testing systems used to collect the experimental measurements presented throughout this work.
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Rojas, E. et al. (2020). A Priori Methods to Assess the Strength of Nonlinearities for Design Applications. In: Kerschen, G., Brake, M., Renson, L. (eds) Nonlinear Structures and Systems, Volume 1. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-030-12391-8_35
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DOI: https://doi.org/10.1007/978-3-030-12391-8_35
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