HOUNSFIELD TENSION TEST AIM: Examination of tensile testing using a Hounsfield tensometer, and the various properties that can be obtained from it PREDICTION / THEORY: Tensile testing involves a pulling action to stretch a material specimen along its longitudinal axis. Most common properties that can be obtained are; limit of proportionality yield strength proof stress ultimate tensile strength breaking stress percentage change in elongation percentage reduction in area toughness modulus of elasticity Due to shortcomings in the design of Hounsfield tensometers, precise strain measurements cannot normally be made. This affects the properties of: modulus of elasticity, toughness, proof stress Tension testing such as with the Hounsfield tensometer is conducted under gradually increasing static uniaxial loading on prepared specimens until fracture of specimen occurs. The specimen elongates in a direction parallel to the applied load. The aim is to try obtaining a uniform distribution of direct stress over the section normal to the direction of load. Static tension tests are the most commonly conducted and are amongst the simplest of all mechanical tests. They are closest to evaluating fundamental mechanical properties for use in design, and as acceptance criteria in regards to quality of materials, provided that the methodology and specimen preparation are standardised Tension testing on metals is done, as these materials have relatively high tenacity and this type of test is more suited in resisting tensile loads than other more brittle materials
HOUNSFIELD TENSION TEST AIM: Examination of tensile testing using a Hounsfield tensometer, and the various properties that can be obtained from it PREDICTION / THEORY: Tensile testing involves a pulling action to stretch a material specimen along its longitudinal axis. Most common properties that can be obtained are; limit of proportionality yield strength proof stress ultimate tensile strength breaking stress percentage change in elongation percentage reduction in area toughness modulus of elasticity Due to shortcomings in the design of Hounsfield tensometers, precise strain measurements cannot normally be made. This affects the properties of: modulus of elasticity, toughness, proof stress Tension testing such as with the Hounsfield tensometer is conducted under gradually increasing static uniaxial loading on prepared specimens until fracture of specimen occurs. The specimen elongates in a direction parallel to the applied load. The aim is to try obtaining a uniform distribution of direct stress over the section normal to the direction of load. Static tension tests are the most commonly conducted and are amongst the simplest of all mechanical tests. They are closest to evaluating fundamental mechanical properties for use in design, and as acceptance criteria in regards to quality of materials, provided that the methodology and specimen preparation are standardised Tension testing on metals is done, as these materials have relatively high tenacity and this type of test is more suited in resisting tensile loads than other more brittle materials