Test Background
The interlaminar shear test of fiber-reinforced plastics can be used to determine the interlaminar shear strength and modulus of fiber-reinforced plastics using the double-beam method (DBS), which is suitable for glass fiber or carbon fiber reinforced thermosetting plastics that can undergo acceptable interlaminar failure. Interlaminar shear strength refers to the shear strength calculated from the critical load.
Zhongke Testing Reliability Experiment Center has the capability of reliability testing of various fiber-reinforced plastics, and provides professional double-beam method interlaminar shear testing services for fiber-reinforced plastic composite materials.
Scope of tests
Commonly used fiber-reinforced plastics include polypropylene (PP), polyethylene (PE), polyester (PET) and other high-molecular polymers and high-purity natural wood, as well as some man-made fibers (cellulose fibers), glass-reinforced resins and metal fibers.
It can be divided into three categories according to its molding methods: thermoplastic resin, thermosetting resin, and polycarbonate.
Test method
A rectangular cross-section specimen is used as a beam and loaded using a 5-point bending method. The applied load produces a pure interlaminar shear stress region.
When delamination failure occurs, the critical load endured by the specimen is used to determine the interlaminar shear strength, and the deflection of the specimen under load is used to determine the interlaminar shear modulus.
Test standard:
GB/T 41501-2022 Fiber reinforced plastic composite materials - Determination of interlaminar shear strength and modulus by double beam method
IS0 291 Plastics Standard environment for conditioning and testing of specimens
ISO 472 Plastics Terminology
ISO 1268 (all parts) Fiber reinforced plastics Test panel preparation method
Statistical processing and interpretation of ISO 2602 test results Estimation of mean values Confidence intervals
IS0 5893 Rubber and plastic testing equipment Specification for tension, bending and compression type (constant speed drive)
ISO 16012 Plastics Determination of linear dimensions of specimens
