{
  "name": "Adhesive joint failure modes: what is seen, what it implies, what to change",
  "description": "Four failure modes of bonded joints compared on fracture location, residue pattern, implication and corrective direction, compiled from the Henkel Loctite bonding manual (manufacturer guidance, 2022).",
  "page": "https://casrai.org/guides/adhesive-bonding",
  "publisher": "CASRAI",
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "dateModified": "2026-11-12T21:13:20Z",
  "temporalCoverage": "2022",
  "spatialCoverage": null,
  "columns": [
    {
      "name": "Failure mode",
      "unit": "",
      "description": ""
    },
    {
      "name": "Where the fracture occurs",
      "unit": "",
      "description": ""
    },
    {
      "name": "What is seen on the parts",
      "unit": "",
      "description": ""
    },
    {
      "name": "What it implies / what to change",
      "unit": "",
      "description": ""
    }
  ],
  "rows": [
    {
      "Failure mode": "Adhesive",
      "Where the fracture occurs": "At the interface between adhesive and substrate",
      "What is seen on the parts": "Adhesive residue on one substrate",
      "What it implies / what to change": "Reconsider surface preparation or the choice of adhesive"
    },
    {
      "Failure mode": "Cohesive",
      "Where the fracture occurs": "Within the adhesive layer",
      "What is seen on the parts": "Adhesive residue on both substrates",
      "What it implies / what to change": "Common with uncured or insufficiently cured adhesive; roughening the substrate will not help"
    },
    {
      "Failure mode": "Substrate",
      "Where the fracture occurs": "Within a substrate, not the adhesive",
      "What is seen on the parts": "Substrate yielded or delaminated (laminates or coated substrates)",
      "What it implies / what to change": "Adhesive is not the weak point"
    },
    {
      "Failure mode": "Mixed (adhesive/cohesive)",
      "Where the fracture occurs": "Part at the interface, part within the adhesive",
      "What is seen on the parts": "Combination of the above patterns",
      "What it implies / what to change": "Treat as a combination of adhesive and cohesive causes"
    }
  ],
  "sources": [
    {
      "title": "Henkel Loctite, How to Create Reliable and Effective Bonded Joints (ACM Bonding Manual)",
      "url": "https://dm.henkel-dam.com/is/content/henkel/ACM-Bonding-Manual_Creating-Reliable-and-Effective-Bonded-Joints--07-08-2022",
      "accessed": "2026-11-12"
    }
  ]
}