Accession Number:

AD1159135

Title:

Modeling the Adhesion of Epoxy to Aluminum and Their Separation under Dynamic Loads using Abaqus and LS-DYNA

Descriptive Note:

[Technical Report, Final Report]

Corporate Author:

U.S. ARMY COMBAT CAPABILITIES DEVELOPMENT COMMAND

Personal Author(s):

Report Date:

2022-02-08

Pagination or Media Count:

46

Abstract:

The modeling of adhered surfaces and the prediction of their separation within multicomponent systems is not widely used in the study of armament systems. Approximations commonly made to bound the problem add to the uncertainty of the predicted results and conclusions drawn about the integrity of the system, particularly under highly dynamic load environments. The use of adhesivecohesive interface models in systems where either a thin film or large bulk volume of epoxy is bonded to an aluminum substrate is investigated in this work. Both quasi-static and highly dynamic loading conditions are considered, with the accelerations varying over three orders of magnitude. The influence of interface model parameters such as adhesive strength, damage evolution models, and comparisons to simple frictional interface models are evaluated. The influence of mesh and geometric simplifications are also discussed, and predictions in two commonly used commercial finite element codes, Abaqus and LS-DYNA, are compared. Recommendations are made regarding the relative sensitivity of predicted results on interface model types and parameters used over the range of loading conditions studied.

Descriptors:

Subject Categories:

  • Mechanics
  • Plastics
  • Adhesives, Seals and Binders

Distribution Statement:

[A, Approved For Public Release]