<ul><li>The Mars Sample Return (MSR) program requires understanding complex dynamic behavior, including contact modeling.</li><li>Commercial software tools used free parameters for contact modeling, which required numerical verification.</li><li>NASA conducted a study in 2005 to test commercial contact solvers in predicting contact forces in transient dynamic environments.</li><li>The NESC/ASD nonlinear solver was used for NASA SSP CLAs and was utilized in the MSR contact verification work to help define free parameters.</li></ul>

Contact Dynamics Predictions Utilizing theNESC Parameterless Contact Model

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