Astm standards tensile testing12/28/2022 ![]() The drop weight impact tester can be used to characterize material at strain rates of up to 100/s, using both tensile and compression testing (Li and Liu, 2012). However, it is not useful at low strain rates (Li and Liu, 2012) and the data cannot be accurately evaluated after necking begins (Johnson and Cook, 1983). It can test at high strain rates of from 102/s to 104/s and correlate the tensile test and torsion test data (Johnson and Cook, 1983). The tensile split Hopkinson pressure bar (TSHPB) measures properties such as flow stress, yield stress, strain hardening, and shear stress (Nicholas 1981). Commonly used tensile testing techniques include the split Hopkinson pressure bar (SHP B) and the drop weight impact tester. Various test methods are available to assess the tensile behaviour of materials. Uniaxial tensile properties of materials are used directly as one measure of material performance and as part of the material property input required for analysis of complex structures (Kohlman et al., 2012). Tensile testing is often used for quality control and to ensure consistency in manufacturing products according to the suppliers' specifications, and to find the safety range of materials to aid design processes (Meyers 1994). It is the most common materials testing method that reveals several important mechanical properties, such as yield strength, modulus of elasticity, ductility, ultimate tensile strength, and toughness. Tensile testing is a simple and inexpensive procedure that is routinely used in industry to quantify the mechanical properties of materials (ASTM 1997). In order to obtain reproducible and accurate results the use of appropriate testing methods that are carried out using approved standard conditions is required. It is therefore very important to understand the relevant material properties requirement for a specific application and how the properties are obtained. Depending on the manufacturer's specifications, engineers must ascertain a material's suitability for a given application through acceptable tests procedures whenever materials are procured and before use. Keywords: TM380 mild steel, tensile properties, ISO 6892:2009, reproducibility.Īscertaining the reliability of materials in service is an important engineering practice for safe and efficient industrial operations. The micrographs reveal a pearlite and ferrite structure typical of mild steel, and the fractographs show a dimpled surface typical of ductile fracture, which is an attribute of mild steel. ![]() The specimen was found to be fairly homogeneous with minor sulphide inclusions. A chemical analysis was conducted to verify the specification by the manufacturer. This confirms that the current testing procedures require the use of long-range strain gauges or extensometer to determine the strain. The strain values calculated as per standard were in disagreement with those determined from extensometer and strain gauges and resulted in lower elastic modulus values. Thus it can be concluded that the tensile test procedure used resulted in accurate and reproducible results. The values of these parameters were found to be in agreement with the values supplied by the manufacturer's specification and showed minimal variations between laboratories. Parameters quantified included yield stress, ultimate tensile strength, and modulus of elasticity. ![]() Tensile tests were conducted on a dog-bone shaped TM380 mild steel specimen with strain gauges attached on either side, to monitor alignment and measure strain, using three different types of tensile testing machines. To achieve this objective, we reviewed the ISO 6892:2009 tensile testing standard along with reported good practice guidelines. The aim of this study was to develop an in-house tensile testing procedure that would yield accurate and reproducible parameters as input material properties into computational models for numerical simulations of the mechanical behaviour of TM380 mild steel. IIIDepartment of Chemical Engineering and Metallurgical Engineering, Tshwane University of Technology, Tshwane (Pretoria) IITshwane University of Technology, Tshwane (Pretoria) IDefence Peace Safety and Security, CSIR, Pretoria Utilization of ISO 6892:2009 testing standard for determining tensile properties of TM380 mild steel
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