British Standards Institution

Source:: ISO
Committee:: PRI/42 - Fibre reinforced thermosetting plastics and prepregs 15.05.2025 Title change from Fibre Reinforced Thermosetting to Fibre reinforced plastics and intermediates
Categories:: Plastics. Reinforced | Adhesives
Comment period start date:: 15/08/2025
Comment period end date:: 08/10/2025
Number of comments:: 0

Comment by:

8th Oct

Scope

This International Standard specifies a method, based upon linear elastic fracture mechanics (LEFM), for the determination of mode I fracture toughness of structural adhesive joints at high loading rates. It determines mode I fracture toughness by testing at high loading rates using double cantilever beam (DCB) specimens of the same or dissimilar materials bonded by adhesive. Wedges are inserted or pulled out at high speed between the pins in the load-block to open the end of the DCB specimen. This test method supplements the quasi-static tests ISO 25217 and ISO 22838 and extends the coverage to higher loading rates than these standards.

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Please email further comments to: debbie.stead@bsigroup.com

Standard timeline

1. Proposal (Complete)

Proposal start date:

2. Draft (Complete)

Draft start date:

25/11/2024

3. Public Comments

Public Comments start date:

15/08/2025

Public Comments end date:

08/10/2025

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Standards Development

BS ISO 25274 ISO 25274 Composites and reinforcements fibres. Determination of mode I fracture toughness of structural adhesive joints at high loading rates

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