Validation and Verification

Publications

Development, Verification, and Validation of a Parametric Cervical Spine Injury Prediction Model

This paper details the development of a high-fidelity, parametric finite element model of the cervical spine for injury prediction, utilizing a unique geometry parameterization derived from CT scans. It employs a rigorous hierarchical verification and validation approach across four levels of complexity to ensure model accuracy and reliability. The research aims to create a robust tool for predicting cervical spine injuries based on detailed anatomical and biomechanical modeling.

Uncertainty Quantification of Stresses in a Cracked Pipe Elbow Weldment

This paper, as Part II of a three-part series, focuses on quantifying uncertainty in finite element analysis by using a two-step method. It employs a 4-parameter logistic function and nonlinear least squares algorithm to estimate and extrapolate results to infinite degrees of freedom, demonstrated across four engineering problems. The study also highlights the superior performance of the hexa-27 element using a super-parametric approach.

EFFECT OF MESH QUALITY IN FINITE ELEMENT ANALYSIS OF CRACK-TIP STRESSES IN A CIRCUMFERENTIAL SURFACE

Robert Rainsberger Jeffrey T. Fong, Pedro V. Marca

This paper investigates errors and uncertainties in Finite Element Method (FEM) simulations, specifically focusing on those arising from mesh density and mesh quality. The authors propose a super-parametric method to generate mesh families and apply a nonlinear least squares fit using a 4-parameter logistic distribution to estimate the most accurate solution and its uncertainty. This approach allows for the ranking of solutions based on an "uncertainty metric".

NAFEMS Finite Element Benchmarks for MDG Code Verification

R.M. Ferencz, R. Greer

This report details the code verification of MDG computational mechanics software using established NAFEMS finite element benchmarks. It systematically compares the MDG code's results against analytical or highly accurate reference solutions provided by NAFEMS to ensure the accuracy of its numerical formulations. The study is crucial for enhancing the reliability and trustworthiness of the MDG software for structural analysis applications.

Beam and Truss Finite Element Verification for DYNA3D

Howard J. Rathbun

This report details the verification of various beam and truss elements within DYNA3D, an explicit finite element software developed by Lawrence Livermore National Laboratory. It systematically compares DYNA3D's simulation results against analytical hand calculations for fundamental loading conditions like axial, bending, and torsion. The study aims to confirm the accuracy and reliability of these foundational elements, ensuring confidence in DYNA3D's application for complex structural analyses.