1 / 8

Introduction to Adhesion in Forestry

Learn about the mechanism of adhesion, how adhesives transfer load, and the advantages and disadvantages of adhesive bonding in the context of forestry applications.

christinew
Télécharger la présentation

Introduction to Adhesion in Forestry

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Forestry 485 Lecture 2-1: Introduction to Adhesion

  2. Adhesion • Adhesion – from the Latin adhaere, “to stick to” • In a practical sense, adhesion is the mechanism by which an adhesive transfers a load from an adherend to the adhesive joint -Packham, 1992

  3. Adherends=solid materials in the adhesive joint, other than the adhesive • Adhesive=(generally) polymeric materials that exhibit viscoelastic properties; capable of bonding to adherends and transferring load from the adherend to the adhesive joint • Adhesive joint=an assembly made by the use of an adhesive. Also called an adhesive bond. -Pocius, 2002

  4. “Adhesive bonding is a method by which materials can be joined to generate assemblies. Adhesive bonding is an alternative to more traditional mechanical methods of joining materials, such as nails, rivets, screws, etc.” -Pocius, 2002

  5. Two primary functions of an adhesive: • 1. Adequately bond to the surface of adherends • 2. Contribute appropriate mechanical properties upon curing (load transfer)

  6. Advantages and Disadvantages of Adhesive Bonding • Advantages: • Minimize stress concentrations • Viscoelastic behavior of adhesive contributes to absorption of applied mechanical load • Dissimilar materials can be joined

  7. Advantages and Disadvantages of Adhesive Bonding • Disadvantages: • Complex behavior at the surface of adherends; complex behavior of adhesive resin formulations • Adhesion occurs within a composite material; difficult to establish if proper bonding occurs

  8. References • Packham, D. 1992. Adhesion, p. 18-20 in Handbook of Adhesion. John Wiley and Sons, New York. 570 pages. • Pocius, A. 2002. Chapter 1, p. 1-14 in Adhesion and Adhesives Technology: An Introduction. Hanser Gardner Publications Inc. Cincinnati, OH. 319 pages.

More Related