GB/T 41932-2022 Active National standards

GB/T 41932-2022 Plastics—Determination of fracture toughness(GIC and KIC)—Linear elastic fracture mechanics (LEFM) approach

Publish Date: 2022-12-30 Implement Date: 2023-04-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Price: $ 50.00

Download

Basic Information

Standard Code: GB/T 41932-2022

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Basic standards and general methods for synthetic resins and plastics

ICS Name: Plastic Composite

Publish Date: 2022-12-30

Implement Date: 2023-04-01

Pages: 22 pages

Scope

This document describes the method of determining the fracture toughness of plastics under given conditions and crack opening mode (Mode I). In order to adapt to different types of equipment or different types of materials, two test methods with prefabricated crack samples are described, namely the three-point bending test and the compact specimen tensile test.
This document is applicable to the following materials, including composites containing short fibers with a length of less than or equal to 7.5 mm:
——Rigid and semi-rigid thermoplastic molding, extrusion, and casting materials;
——Rigid and semi-rigid thermosetting molding and casting materials.
Note 1: It is generally believed that short fibers with a length of 0.1 mm to 7.5 mm can cause inhomogeneity and anisotropy in the crack tip zone during fracture. Appendix B provides a test method for extending the application range of the same test steps to rigid and semi-rigid thermoplastic or thermosetting plastics containing such short fibers under defined conditions.
Note 2: Since the model adopted assumes that the material generating the crack has linear elastic properties and the crack tip is in a plane strain state, certain restrictions are imposed on the linearity of the force-displacement curve and the width and thickness of the specimen to ensure the validity of the test (see 9.4). The crack should be sharp enough to prevent sharper cracks from significantly reducing the measured performance values.