BS EN 4866:2021 pdf free
BS EN 4866:2021 pdf free.Aerospace series一Definitions of imperfections and defects in organic matrix composite materials.
This document provides a list of terms with their definitions illustrated by typical photographs, in order to define a common vocabulary on the imperfections and damage that may occur during the manufacture of organic matrix composite materials (which will be called “resin’ in this document). Some types of damage may also be encountered in use.
This document is restricted to their definitions and does not give any acceptance criteria. The word “imperfection will be preferred to the word “defect, although the word defect” might be usually used. Defect acceptance criteria to be discussed between the user and customer and documented appropriately between the two parties.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• ISO Online browsing platform: available at https://www.iso.org/obp
• IEC Electropedia: available at https://www.electropedia.org/
3.1 General
3.1.1 damage damage corresponds to degradation of the resin and/or the fibres caused by mechanical, thermal or environmental stresses
3.1.2 defect imperfection or damage which exceeds the part acceptance criterion
3.1.3 imperfection particularity encountered in composite materials that may result from the manufacturing process and/or the conditions of use
3.2 Bonding imperfections
See also EN ISO 10365.
3.2.1 absence of adhesive absence of adhesive with respect to the part definition
Note 1 to entry: See Figure B.1.
3.2.2 absence of contact presence of the required adhesive on one or both faces of the assembly, but with no contact
Note 1 to entry: Encountered in case of poor matching.
Note 2 to entry: See Figure B.2.
3.2.3 adhesive joint colour heterogeneity possible imperfections when using two-component adhesives of different colours, and caused by incomplete mixing of the components (visible in particular in the adhesive bead)BS EN 4866 pdf free download.
