A Radical Computational Approach to Dynamic Systems with Viscoelastic Materials
Abstract
Currently, the accuracy and speed of transient simulations are significantly limited by thedynamic behavior of viscoelastic material,s. For historical reasons, the research community has developed a large number of constitutive laws to represent viscoelastic materi,als. Each of these laws is an analytic function involving unknown parameters has its own set of advantages and disadvantages with re,gard to accuracy and computational expense. In order to use a constitutive law, one must first estimate the law?s parameters from ex,perimentally measured constitutive data. However, we realize now that constitutive laws are typically used in numerical integrations, where their analytical form is no longer necessary. The proposed work exploits this realization by using experimentally measured co,nstitutive data directly in the finite element analysis, thus avoiding the approximations and exceedingly high computational expense,s introduced by constitutive laws. Freedom from constitutive laws allows one to work more strategically and efficiently on the remai,ning numerical integrations required by the finite element formulation. The proposed work will create a method for including viscoel,astic material properties in transient simulations. Given that transient simulations are used throughout many industries to improve,designs that use viscoelastic materials to control sound and vibration, the proposed work is highly significant. This radically new,approach is a value multiplier to significant investments already made in finite element software. Within the research community tha,t uses the Sierra finite element code, this research will significantly affect the majority of transient simulations.Approved for pu,blic release.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Oct 06, 2022
- Source ID
- N000142212785
Entities
People
- James Mcdaniel
Organizations
- Boston University
- Office of Naval Research
- United States Navy