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Evaluation of the Curing of Adhesive Systems by Rheological and Thermal Testing
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Exploring Bio-Based Polyurethane Adhesives for Eco-Friendly Structural Applications: An Experimental and Numerical
Ana M S Couto1, Catarina S P Borges2, Shahin Jalali2
1Departamento de Engenharia Mecânica, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
Polymers
|September 14, 2024
Summary
This study investigates bio-adhesive L-joints made from pine wood, finding that joint configuration significantly impacts strength. Experimental and numerical analyses accurately predicted failure modes using the maximum principal stress failure predictor.
Area of Science:
- Materials Science
- Mechanical Engineering
- Sustainable Engineering
Background:
- Growing environmental concerns drive industries like automotive and civil sectors towards sustainable materials.
- Bio-adhesives, derived from renewable resources, are crucial for sustainable adhesive bonding applications.
- L-joints are common in the automotive industry for structural components requiring high bending stiffness.
Purpose of the Study:
- To analyze the mechanical behavior and failure modes of bio-adhesive L-joints using pine wood.
- To compare two L-joint configurations with varying wood fiber orientations.
- To validate experimental findings with finite element modeling.
Main Methods:
- Experimental tensile testing of pine wood L-joints bonded with bio-adhesives.
- Finite element modeling (FEM) to simulate joint behavior under tensile load.
- Application of the maximum principal stress failure predictor (MPSFP) for crack propagation analysis.
Main Results:
- Joint configuration critically influences the overall performance and strength of the bio-adhesive joints.
- One specific joint configuration exhibited superior strength compared to the other.
- High correlation between experimental and numerical results was achieved for one configuration.
- The MPSFP accurately predicted crack initiation and propagation paths in both joint configurations.
Conclusions:
- Optimizing L-joint configuration is essential for maximizing the performance of wood-bio-adhesive structures.
- Combined experimental and numerical approaches provide reliable insights into joint behavior.
- The MPSFP is a valuable tool for predicting failure in these sustainable joints.
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