GB/T 1452-2018 in English

GB/T1452—2018: In-depth interpretation of the test method for the horizontal tensile strength of sandwich structures

This standard specifies the terms and definitions, test principles, test equipment, specimen requirements and test steps for the horizontal tensile strength of sandwich structures, and is applicable to the determination of the horizontal tensile strength of sandwich structures. This article will provide you with a detailed interpretation from four aspects: standard background, technical evolution, implementation points and application cases.

1. Background of standard formulation

GB/T1452—2018 is a comprehensive revision of GB/T1452—2005, mainly focusing on the technical update of the test method for the horizontal tensile strength of sandwich structures. With the development of composite material technology, especially the popularization of core materials such as honeycomb core materials and balsa wood, the original standards can no longer meet the needs of modern engineering.

2. Evolution of Standard Technology

3. Key points for standard implementation

4. Application case analysis

An aviation composite material company adopted this standard to conduct flat tensile strength test on balsa wood core sandwich structure. The test results show that the use of a tensile fixture with an automatic centering function can significantly improve the test accuracy, and the main failure modes of the specimens are panel delamination failure and core tensile failure.

5. Implementation Suggestions

1. Equipment selection: Preferentially use a tensile fixture with an automatic centering function to ensure that the center axis of the specimen is aligned
2. Material preparation: Strictly control the dimensional tolerance and parallelism of the specimen to avoid the splicing line being located at the edge of the specimen
3. Data processing: Pay attention to distinguishing different failure modes, and the lattice honeycomb core material needs to calculate the flat tensile strength