ISO 22841:2021/Amd 1:2022

Overview

ISO 22841:2021/Amd 1:2022 is an important international standard published by ISO that focuses on composites and reinforcement fibres-specifically Carbon Fibre Reinforced Plastics (CFRPs) and metal assemblies. This amendment provides precision data related to the determination of tensile lap-shear strength, a critical property used to evaluate the mechanical performance of bonded or joined CFRP-metal assemblies.

This amendment is essential for manufacturers, researchers, and quality control specialists working with CFRP and metal joints, offering detailed insights into the precision and reproducibility of testing methods. By standardizing test conditions and statistical evaluation, it enhances the reliability and consistency of tensile lap-shear strength measurements worldwide.

Key Topics

• Carbon Fibre Reinforced Plastics (CFRPs) and metal assemblies: Focus on bonded assemblies combining CFRP and metals.
• Tensile lap-shear strength: Methodology for testing the shear strength of adhesive interfaces in CFRP-metal joints.
• Precision data addition: Statistical assessment of test repeatability and reproducibility based on an international interlaboratory test.
• Test conditions:
  • Test specimens prepared and distributed consistently to labs across five countries (Japan, China, India, Germany, UK).
  • Test speed standardized at 2.5 mm/min in tensile lap-shear tests.
• Statistical analysis based on ISO 5725-2:
  • Repeatability (r): Variation within the same laboratory under identical conditions.
  • Reproducibility (R): Variation between different laboratories performing the same test.
• Interlaboratory test results highlight variability in test data and help define measurement confidence intervals.

Applications

ISO 22841:2021/Amd 1:2022 is applicable for industries and sectors that rely on CFRP and metal composite structures, including but not limited to:

• Aerospace and aviation: Ensuring the performance integrity of bonded CFRP-metal components.
• Automotive manufacturing: Quality testing of hybrid metal-plastic joints for lightweight vehicle design.
• Mechanical engineering: Validation of adhesive bonding methods in CFRP-metal hybrid assemblies.
• Materials testing laboratories: Standardized procedures to assess adhesive lap-shear strength with statistically validated precision.
• Research and development: Enhancing joint designs through accurate and reproducible mechanical testing.

By following ISO 22841 and its amendment on precision data, organizations can improve product safety, optimize manufacturing processes, and achieve global compliance in CFRP-metal assemblies.

Related Standards

To complement ISO 22841:2021/Amd 1:2022, consider the following related ISO standards for composite materials testing and quality assurance:

• ISO 527 series – Plastics – Determination of tensile properties of plastics including composite materials.
• ISO 14691 – General principles for composite material testing.
• ISO 5725 – Accuracy (trueness and precision) of measurement methods and results.
• ISO 11343 – Adhesives – Determination of tensile lap-shear strength of bonded assemblies (relevant for comparison of adhesive joints).
• Relevant standards from ISO/TC 61 (Plastics) and ISO/TC 20/SC 14 (Aerospace) for further guidance on CFRP usage and testing protocols.

By implementing the ISO 22841 standard and its amendment, professionals gain access to globally recognized methods for testing and evaluating CFRP-metal joints with high confidence in measurement precision, supporting innovation and reliability in composite material engineering.