Stress analysis of adhesively bonded single lap joints: Survey and evaluation of analyses
Abstract
A survey of strength prediction (stress distribution in single lap joints) methods was performed. This resulted in ten analyses in which a new aspect of the bonded joint is modeled. The theories are classified into three categories and six representative analyses are programmed in a spreadsheet and are available for future calculations. With these programs, the stress distributions in a standard single lap joint are calculated and compared. This comparison revealed that the differences in the predicted maximum stresses are less than 30%. Analytical theories are compared to linear elastic finite element results found in literature. This revealed that elastic analytical theories predict a correct average stress distribution if: the joint has a square edge, no spew fillet; the loads on the joint are low, that is, no plasticity in the adhesive or adherends. However, it should be noted that the predicted stress distributions are average stresses over the thickness, while in actual joints significant variations are present in this direction. Thus, the calculated distributions represent average values.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- April 1993
- Bibcode:
- 1993STIN...9434643V
- Keywords:
-
- Adhesive Bonding;
- Computer Programs;
- Fracture Strength;
- Lap Joints;
- Mathematical Models;
- Stress Analysis;
- Elastic Properties;
- Finite Element Method;
- Fracture Mechanics;
- Predictions;
- Stress Distribution;
- Structural Design;
- Structural Mechanics