Aoying biaxial bending test fixture

Aoying biaxial bending test fixture Aoying biaxial bending test fixture

Double axis bending test fixtureIn the GB 30367-2025 standard, the biaxial bending strength of dental ceramic materials is determined using the "piston three ball" test method (also known as the punch rod pressure three ball test).

The core structure and requirements of this fixture are as follows:

support systemComposed of three hard steel balls with a diameter of (4.5 ± 2) mm, evenly distributed at a 120 ° angle within a support ring with a diameter of (11 ± 1) mm, serving as the support points for the specimen.

loading methodThe load is applied to the center of the specimen through a flat punch (piston) with a diameter of (1.4 ± 0.2) mm to ensure stress concentration in the central area.

Sample placementThe sample should be placed concentric on three supporting balls to ensure loading symmetry and testing accuracy.

Uniformization of contact pressureA non rigid material film (such as a 0.05mm thick polyethylene film) should be placed between the supporting ball and the specimen, and between the specimen and the loading head, to evenly distribute the contact pressure and reduce local stress concentration.

Cooperation with experimental equipmentTo be used in conjunction with a universal mechanical testing machine, the crosshead speed should be set to (1 ± 0.5) mm/min, and the load measurement accuracy should reach ± 0.1 N.

Shanghai Aoying Intelligent Technology Co., Ltd. was established in November 2012 and is located in Fengxian District, Shanghai. It is a high-tech enterprise specializing in the research and development, production, sales, service, and system of testing equipment, providing high-performance products and system solutions for thousands of customers.

Shanghai Aoying is dedicated to providing high-precision testing instrument promotion and services, and is committed to tailoring testing field solutions for national quality inspection departments, universities, and research institutions. Our product system is rich and diverse, covering hundreds of products and multiple series.

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