Finite Element Modeling of Viscoelastic Behavior and Interface Damage in Adhesively Bonded Joints

Abstract

This paper presents a study on viscoelastic behavior of the adhesive and damage analysis of adhesive-adherend interfaces in adhesively bonded joints. First, viscoelastic finite element analysis of a model joint with viscoelastic adhesive has been conducted while considering geometric nonlinearity as well as thermal expansion. Then a finite element model for bond failure analysis at the viscoelastic adhesive-elastic adherend interface for a mixed-mode fracture problem is proposed. In the framework of cohesive zone model, traction-separation law is used to define the constitutive response of the cohesive elements at the interface. Quadratic nominal stress criterion and mixed-mode energy criterion are used to determine the damage initiation and evolution at the interface, respectively.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2012
Accession Number
ADA584236

Entities

People

  • Feifei Cheng
  • Junuthula N. Reddy
  • O. O. Ozsoy

Organizations

  • Texas A&M University

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Adhesives
  • Bonded Joints
  • Composite Materials
  • Crack Propagation
  • Engineering
  • Failure Mode And Effect Analysis
  • Finite Element Analysis
  • Joints
  • Laminates
  • Materials
  • Materials Science
  • Mechanics
  • Modulus Of Elasticity
  • Numerical Analysis
  • Shear Stresses
  • Thermal Expansion
  • Traction

Fields of Study

  • Engineering

Readers

  • Structural Health Monitoring of Composite Structures.