Compression, Flexural and Tensile tests (original) (raw)
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2017
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Learning about Stress and Strain for Real World Applications
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Students learn about stress and strain using uniaxial models in introduction to mechanics of materials. The essence of these quantities is studied steadily throughout classes. Nowadays, advanced problems involving elasticity, plasticity, thermal expansion, creep, etc. are solved using software based on the finite element method not only to evaluate strength of products in their design but also to examine workability of processes. In order to accurately investigate obtained stress and strain, knowledge of them based on mechanics of materials as well as materials science is effective. When students become engineers and face real world applications, some of them think that their skills relating to the quantities are not sufficient. Some activities are performed to improve their skills. For example, the author’s lecture on heat treatment distortion and residual stress on a one-day course for engineers includes learning materials for intuitive understanding of the quantities due to elast...
Global Journal of Engineering Education 48 INTRODUCTION
The tensile properties of materials, such as the ultimate tensile strength, yield strength, elongation and elastic modulus, are very important factors for engineering designs. However, it is not easy for students to understand and evaluate the tensile properties of materials. In this study, a small and handy tensile testing machine was designed to help students conduct tensile tests in class using a miniature tensile specimen. The tensile testing machine consists of a stepping motor as an actuator, a load-cell, a load-cell amplifier, a data acquisition system and the testing machine frame. The detected load signal is amplified by the amplifier and is sent to the data acquisition (DAQ) system. The DAQ system with LabVIEW software receives the signals from the load-cell and displacement gauge. Using this testing machine, it is possible to conduct tensile tests on miniature tensile specimens at speeds of 0.001~1.0 mm/s.
Learning in engineering through design, construction,analysis and experimentation
International Journal of Engineering Education, 2019
The experience presented is part of the teaching of two subjects of the Mechanics discipline: Continuum Mechanics andStrength of Materials, in the field of Mechanical and Industrial Engineering. In the bachelor’s degree at the ETSEIB-UPC,the first semester of the third academic year is devoted to Continuum Mechanics and the second one to Strength ofMaterials. Both subjects integrate theory and practice: applications, lab and coursework. The article focuses on thecoursework or also named course project, which consists of designing/optimizing, analysing, manufacturing and testing amechanical/structural element subject to stresses and strains. This paper aims at showing the benefits of combiningpractice, theory, simulation and experimentation, as well as some of the limitations and difficulties encountered in itsimplementation, such as the evaluation of the degree of involvement of each team member and the lack of correlationbetween the mark of the coursework and examinations’ scores. ...
Introduction to Tensile Testing
Tensile Specimens. Consider the typical tensile specimen shown in . It has enlarged ends or shoulders for gripping. The important part of the specimen is the gage section. The cross-sectional area of the gage section is reduced relative to that of the remainder of the specimen so that deformation and failure will be Fig. 10 Improper (left) and proper (right) alignment of specimen attachment areas with axis of specimen