BS EN 820-5:2009 PDF

Scope: This part of EN 820 describes methods for determining the elastic moduli, specifically Young's modulus, shear modulus and Poisson's ratio, of advanced monolithic technical ceramics at temperatures above room temperature. The standard prescribes three alternative methods for determining some or all of these three parameters: A the determination of Young's modulus by static flexure of a thin beam in three- or four-point bending. B the determination of Young's modulus by forced longitudinal resonance, or Young's modulus, shear modulus and Poisson's ratio by forced flexural and torsional resonance, of a thin beam. C the determination of Young's modulus from the fundamental natural frequency of a struck bar (impulse excitation method). This part of EN 820 extends the above-defined room-temperature methods described in EN 843-2 to levated temperatures. All the test methods assume the use of homogeneous test pieces of linear elastic materials. The test assumes that the test piece has isotropic elastic properties. At high porosity levels all of the methods can become inappropriate. The maximum grain size (see EN 623-3), excluding deliberately added whiskers, should be less than 10 % of the minimum dimension of the test piece.

BS EN 820-5:2009 Referenced Document

EN 60584-2 Thermocouples Part 2: Tolerances (Remains Current)
EN 820-1 Advanced technical ceramics - Method of testing monolithic ceramics; Thermomechanical properties - Part 1: Determination of flexural strength at elevated temperatures*， 2024-04-19 Update
EN 843-1:2006 Advanced technical ceramics - Mechanical properties of monolithic ceramics at room temperature - Part 1: Determination of flexural strength*， 2024-04-19 Update
EN ISO 7500-1 Metallic materials - Verification of static uniaxial testing machines - Part 1: Tension/compression testing machines - Verification and calibration of the force-measuring system
EN ISO/IEC 17025 General requirements for the competence of testing and calibration laboratories*， 2017-12-01 Update
ISO 3611 Geometrical product specifications (GPS) — Dimensional measuring equipment — Design and metrological characteristics of micrometers for external measurements*， 2023-05-01 Update
ISO 463 Geometrical Product Specifications (GPS) - Dimensional measuring equipment - Design and metrological characteristics of mechanical dial gauges; Technical Corrigendum 2
ISO 6906 Vernier callipers reading to 0,02 mm

2009 BS EN 820-5:2009 Advanced technical ceramics - Thermomechanical properties of monolithic ceramics - Part 5:Determination of elastic moduli at elevated temperatures