What is BS EN ISO 17161 - Uniaxial mechanical tests about?
BS EN ISO 17161 is an international standard on fine ceramics which covers determination of the degree of misalignment in uniaxial mechanical tests.
BS EN ISO 17161 describes a procedure:
- To verify the degree of misalignment of the load train of the test machines using a reference test specimen uniformly loaded in tension or in compression
- To give indications in order to correct defects such as torsion and bending
BS EN ISO 17161 is not intended to provide a quantitative and acceptable limit before the testing of ceramic matrix composites with a fibre reinforcement: unidirectional (1D), bidirectional (2D), and tridirectional (xD, with 2 < x ≤ 3) loaded along one principal axis of reinforcement. This limit depends on the sensitivity of each type of composite to the misalignment defect.
Note 1: This limit is to be defined between the testing establishment and the customer.
Note 2: Monolithic ceramics are very sensitive to misalignment defects while CMCs (ceramic matrix composite) in general are moderately sensitive to them.
Who is BS EN ISO 17161 - Uniaxial mechanical tests for?
BS EN ISO 17161 on uniaxial mechanical tests is useful for:
- Fine ceramics manufacturers
- Mechanical engineers
Why should you use BS EN ISO 17161 - Uniaxial mechanical tests?
Ceramic matrix composites (CMCs) are a subgroup of composite materials and a subgroup of ceramics. They consist of ceramic fibers embedded in a ceramic matrix. The fibers and the matrix both can consist of any ceramic material, whereby carbon and carbon fibers can also be regarded as a ceramic material.
The influence and quality of the fiber interface can be evaluated through mechanical properties.
The uniaxial tension test is one of the most commonly used tests to determine important material parameters such as Young's modulus, yield strength, ultimate strength, elongation at break, Poisson's ratio, and Lankford coefficients (r-values).
By knowing the degree of misalignment by using uniaxial mechanical tests you can increase safety and reliability in your organization, BS EN ISO 17161 provides you with the best practices to carry out these tests.