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BS ISO 22838:2020

BS ISO 22838:2020

$142.49

Composites and reinforcements fibres. Determination of the fracture energy of bonded plates of carbon fibre reinforced plastics (CFRPs) and metal using double cantilever beam specimens

Published By Publication Date Number of Pages
BSI 2020 32
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This document specifies the test method for the determination of adhesive fracture energy of adhesively bonded plates of carbon fibre reinforced plastic (CFRP) and metal using a double cantilever beam (DCB) specimen. The test method is also applicable to bonded joints between metals and other composite materials, such as glass fibre reinforced plastics.

PDF Catalog

PDF Pages PDF Title
2 National foreword
6 Foreword
7 Introduction
9 1 Scope
2 Normative references
3 Terms, definitions and symbols
3.1 Terms and definitions
10 3.2 Symbols
11 4 Principle
5 Apparatus
12 6 Specimens
6.1 Number of specimens
6.2 Conditioning
6.3 Manufacture of adhesive joint specimens
6.3.1 General
13 6.3.2 DCB specimen measurements
6.4 Preparation of specimens
14 7 Procedure
7.1 Test set-up and data recording
7.2 Initial loading (precracking stage)
7.3 Re-loading: Testing from the precrack
17 7.4 Determination of the thickness ratio of the CFRP and metal beams
7.4.1 Theoretical prediction of thickness ratios
7.4.2 Procedure to detect the occurrence of plastic deformation during a DCB adhesive joint test
18 7.5 Measurement of machine compliance
7.6 Measurement of curvature induced by coefficient of thermal expansion difference between metal and composite beams
20 8 Data analysis
8.1 Determination of the raw data from the load-displacement trace
8.1.1 General
8.1.2 Initiation values
21 8.1.3 Propagation values
8.2 Determination of adhesive fracture energy
8.2.1 General
8.2.2 DCB test with identical thickness: Corrected beam theory (CBT)
22 8.2.3 DCB test with dissimilar thicknesses: modified beam theory for DCB specimens with dissimilar thicknesses
23 8.2.4 DCB test with identical and dissimilar thicknesses: Area method
9 Precision
24 10 Test report
26 Annex A (informative) Work flow chart as brief guideline
27 Annex B (informative) Formula for calculating G value using (EI)eq or E1I1 E2I2
28 Annex C (normative) Measurement of test system compliance
30 Bibliography

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BS ISO 22838:2020
$142.49