GB/T 41762.1-2025 Fibre-reinforced plastic composites—Determination of laminate through-thickness properties—Part 1:Direct tension and compression tests

Scope

This document describes the test method for determining the performance (i.e., strength, elastic modulus, Poisson's ratio, and failure strain) in the thickness direction of fiber-reinforced plastic composites using rectangular and/or wafer-shaped specimens.
This document is applicable to laminates with a thickness of 20 mm to 40 mm, with fiber forms including oriented and non-oriented, continuous and discontinuous, and matrix types including thermoset and thermoplastic.
This document describes the following three specimen types: — Type I, with a rectangular cross-section that remains constant along the thickness direction of the specimen. Type I specimens are suitable for determining elastic properties. — Type II, with a wafer-shaped and rectangular cross-section that varies along the thickness direction of the specimen. Type II specimens are suitable for determining the tensile strength of highly anisotropic and thermoplastic materials. — Type III, with a wafer-shaped and rectangular cross-section that remains constant along the gauge length of the specimen. Type III specimens are suitable for determining elastic and strength properties, providing a complete stress-strain response.
Type I and Type II specimens are also applicable to non-reinforced plastics, but not to rigid porous materials and sandwich structures containing porous materials.
This document presents two test methods: — Method A - Tensile testing. — Method B - Compression testing.

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