Daniel Roettgen
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View article: Testing and Modeling of Friction and Slip in Mechanical Interfaces: State of the Art and Perspectives for the Next Decade.
Testing and Modeling of Friction and Slip in Mechanical Interfaces: State of the Art and Perspectives for the Next Decade. Open
Experiments and physics-based modeling efforts both show that the features within a jointed interface can have an outsized influence on the nonlinear dynamics of a large-scale structure. The interfacial features, including asperities and m…
View article: Experimental Substructuring of the Dynamic Substructures Round-Robin Testbed
Experimental Substructuring of the Dynamic Substructures Round-Robin Testbed Open
Experimental-analytical substructuring has been a popular field of research for several years and has seen many great advances for both frequency-based substructuring (FBS) and component mode synthesis (CMS) techniques. To examine these te…
View article: A Comparative Study of Joint Modeling Methods and Analysis of Fasteners [Slides]
A Comparative Study of Joint Modeling Methods and Analysis of Fasteners [Slides] Open
Motivation: Crucial aspect of mechanical design is joining methodology of parts. Ability to analyze joint and fasteners in system for structural integrity is fundamental. Different modeling representations of fasteners include spring, beam…
View article: Pre-test Predictions of Next-Level Assembly Using Calibrated Nonlinear Subcomponent Model
Pre-test Predictions of Next-Level Assembly Using Calibrated Nonlinear Subcomponent Model Open
A proper understanding of the complex physics associated with nonlinear dynamics can improve the accuracy of predictive engineering models and provide a foundation for understanding nonlinear response during environmental testing. Several …
View article: Evaluation of Joint Modeling Techniques Using Calibration and Fatigue Assessment of a Bolted Structure.
Evaluation of Joint Modeling Techniques Using Calibration and Fatigue Assessment of a Bolted Structure. Open
chassis joint at the single huck-bolt level. Both tension and shear loading conditions were considered, and the resulting static and fatigue strengths will be used to guide the joint design for a replacement composite/steel joint. A commer…
View article: An Investigation into Shaker-Structure Interaction During Nonlinear Force Appropriation Testing (Submission 10073).
An Investigation into Shaker-Structure Interaction During Nonlinear Force Appropriation Testing (Submission 10073). Open
also potentially at sub- or superharmonics, or it can even produce aperiodic and chaotic motion in certain cases. Shaker-structure interaction occurs when the response physically pushes back against the shaker attachment, producing non-fun…
View article: Modeling and Experimental Validation of a Pylon Subassembly Mockup with Multiple Nonlinearities
Modeling and Experimental Validation of a Pylon Subassembly Mockup with Multiple Nonlinearities Open
The industrial approach to nonlinearities in structural dynamics is still very conservative, particularly from an experimental point of view. A demo aluminum aircraft has been equipped with discrete nonlinear elements designed to replicate…