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Updated: Jul 10, 2025
08:40
Standard Test Method ASTM D 7998-19 for the Cohesive Strength Development of Wood Adhesives
Published on: May 17, 2020
3.0K
Mechanical Performance of Adhesive Connections in Structural Applications.
Marco Lamberti1,2, Aurélien Maurel-Pantel1, Frédéric Lebon1
1Aix-Marseille University, CNRS, Centrale Marseille, LMA, 13453 Marseille, France.
Materials (Basel, Switzerland)
|November 25, 2023
Summary
This study investigates how defects in adhesive bonds affect structural integrity, particularly for offshore wind turbines. Understanding these damage parameters is crucial for reliable engineering design and safety.
Area of Science:
- Materials Science
- Mechanical Engineering
- Structural Integrity
Background:
- Adhesive bonding is vital for offshore structures, but adhesive layer strength is a critical design parameter.
- Defects like voids significantly reduce the mechanical performance of bonded composite structures.
- Accurate evaluation of defects is essential for predicting bonded joint behavior under load.
Purpose of the Study:
- To characterize the mechanical properties of a commercial epoxy resin.
- To define damage parameters for adhesively bonded joints.
- To assess the influence of defects on adhesive layer strength.
Main Methods:
- Extensive experimental program on adhesively bonded connections.
- Application of Mode I and Mode II loading conditions.
- Identification of initial damage parameters using the Kachanov-Sevostianov material definition.
Main Results:
- Quantified the reduction in strength due to increasing void content in the adhesive layer.
- Characterized the mechanical properties of the epoxy resin under different loading modes.
- Established initial damage parameters accounting for diffuse cracking.
Conclusions:
- Defect presence critically impacts adhesive bond strength, necessitating precise damage parameter evaluation.
- The Kachanov-Sevostianov model effectively incorporates initial diffuse cracking for damage assessment.
- This research provides essential data for designing reliable bonded joints in demanding applications like offshore wind energy.
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