Bending strength refers to the ability of a material to resist continuous bending and cracking, mainly used to evaluate the strength of brittle materials such as ceramics. Generally, three-point bending test or four-point test method is used for evaluation. The four point test requires two loading forces, which is relatively complex; Three point testing is commonly used. Its value is proportional to the pressure it is subjected to
Test elements
1. Mechanical properties: Various mechanical properties exhibited by materials when subjected to external forces.
2. Stress:
The internal reaction of a material to external forces when subjected to external forces. The magnitude of stress is expressed by the following formula: stress（ δ)= Action (F)/Unit area of material (A), in Pa
3. Strain:
The deformation caused by external forces on a material. The magnitude of strain is expressed by the following formula: strain（ ε)= Variable length (△ L)/Initial length (L)
4. Tensile stress or tensile stress:
The internal stress of a material under tension.
5. Compressive stress or compressive stress:
The internal stress of a material when compressed.
6. Shearstress:
When a material is subjected to shear force, the internal stress occurs when parallel parts slide.
However, when a certain section of material or restoration is subjected to stress, three forms of stress often coexist. For example, when chewing pressure acts on a fixed bridge, the force on the Ni surface of the bridge body is compressive stress, the gingival base of the bridge body is tensile stress, and the connection between the abutment restoration and the bridge body is shear stress7. Tensile strength or tensile strength
8. Compressive strength or compressive strength:
Apply compressive load on the specimen to the unit area load value at the time of specimen failure.
9. Bending strength:
Also known as flexural strength or flexural strength, the unit area load value applied between the two support points of the specimen until the specimen fails.
Calculation formula
Three point bending test formula:
R=(3F * L)/(2b * h * h)
F - Failure load
L - Span
b - Width
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China