ISO 22605:2020 pdf download

ISO 22605:2020 pdf download.Refractories — Determination of dynamic Young’s modulus (MOE) at elevated temperatures by impulse excitation of vibration
1 Scope
This document specifies a method for determining the dynamic Young’s modulus of rectangular cross- section bars and circular cross-section specimens of refractories by impulse excitation of vibration at elevated temperature. The dynamic Young’s modulus is determined using the resonant frequency of the specimen in its flexural mode of vibration. This document does not address the safety issues associated with its use. It is responsibility of the users of this standard to establish appropriate safety and health practices.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 5022, Shaped refractory products — Sampling and acceptance testing
ISO 8656-1, Refractory products — Sampling of raw materials and unshaped products — Part 1:Sampling scheme
ISO 12680-1, Methods of test for refractory products — Part 1: Determination of dynamic Young’s modulus (MOE) by impulse excitation of vibration
ISO 16835, Refractory products — Determination of thermal expansion
IEC 60584-1, Thermocouples — Part 1: EMF specifications and tolerances
IEC 60584-2, Thermocouples — Part 2: Tolerances
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1 modulus of elasticity
MOE
ratio of stress to strain below the proportional limit (3.2)
3.2 proportional limit
greatest stress which a material is capable of sustaining without deviation form proportionality of stress to strain (Hooke’s Law)
3.3 homogeneous
uniform composition, density and texture
Note 1 to entry: A result of homogeneity is that any smaller specimen taken from the original is representative of the whole. In refractory practice, as long as the geometrical dimensions of the specimen are large with respect to the size of individual grains, crystals, components, pores and microcracks, the body can be considered homogeneous.
3.4 sotropic
condition of a specimen such that the values of the elastic properties are the same in all directions in the specimen
3.5 resonant frequency
natural frequencies of vibration of a body driven into flexural vibration (3.6)
Note 1 to entry: Resonant frequencies are determined by the elastic modulus, mass and dimensions of the specimen. The lowest resonant frequency in a vibrational mode is the fundamental resonant.
3.6 flexural vibrations
displacements in a slender bar or rod (3.11) in the plane normal to its length
3.7 nodes
location on a slender bar or rod (3.11) in resonance having a constant zero displacement
Note 1 to entry: For the fundamental flexural resonance of such a rod or bar, the nodes are located at 0,224L form each end, where L is the length of the specimen.
3.8 anti-nodes
locations, generally two or more, of local maximum displacement in an unconstrained slender bar or rod (3.11) in resonance
Note 1 to entry: For the fundamental flexural resonance, the anti-nodes are located at the two ends and the centre of the specimen.
3.9 out-of-plane flexure
flexural mode for rectangular parallelepiped geometry specimens in which the direction of the displacement is perpendicular to the major plane of the specimen
3.10 in-plane flexure
flexural mode for rectangular parallelepiped geometry specimens in which the direction of the displacement is in the major plane of the specimen