PPT-Strain Strength of Materials

StressStrain Diagram Suppose that a metal specimen be placed in tensioncompression testing machine As the axial load is gradually increased in increments the total elongation over the gage length is measured at each increment of the load and this is continued until failure of the specimen takes place Knowing the original crosssectional area and length of the specimen the normal stress σ and the strain ε can be obtained The graph of these quantities with the stress σ along the yaxis and the strain ε along the xaxis is called the stressstrain diagram The stressstrain diagram differs in form for various materials The diagram shown below is that for a medium carbon structural steel . 1. overview of mechanical behavior. 2. dislocations. 3. plastic deformation in single and polycrystalline materials. 4. strengthening of crystalline materials. 5. high temperature deformation of crystalline materials. M.E. 7501 – Lecture 6. Dr. B.J. Sullivan. Strength of a Continuous Fiber Reinforced Lamina. For the orthotropic lamina under simple uniaxial or shear stress, there are 5 strengths:. = Longitudinal tensile strength. Injury: . what it is and what you can do about . it?. RSI: What it is. “ Repetitive strain injury (RSI), also called work-related upper limb disorder, is a general term used to describe the pain from muscles, nerves and tendons caused by repetitive movement and overuse”. Kazuaki Negishi MD, PhD, FESC. Senior Lecturer. Menzies Research . Institute Tasmania. Basic concept of myocardial strain. How to measure?. Clinical implication. Suggested readings. Take home messages. Multiple Bending-Unbending. Springback Process. H.-M. Huang. S.-D. . Liu. National Steel Corporation,. 12261 Market St.,. Livonia, MI . 48150. S. Jiang. DaimlerChrysler Corporation,. 800 Chrysler Dr.,. Nanobeams. Eli Bingham. University of North Carolina. UW REU 2012. Advisor: David Cobden. Overview of VO. 2. Strongly correlated. Band theory breaks down when electrons interact. Metal-insulator transition. Need a sheet of paper to make a chart.. Make this chart and we will fill it in.. Grade 1. Grade 2. Grade 3. Strain. Sprain. Grades of Strain. Grade 1. Local pain which increases with tension on muscle.. Beams bend . w. hen . l. oaded. DaVinci-1493. "Of bending of the springs: If a straight spring is bent, it is necessary that its convex part become thinner and its concave part, thicker. This modification is pyramidal, and consequently, there will never be a change in the middle of the spring. You shall discover, if you consider all of the aforementioned modifications, that by taking part '. Whenever a force is applied to a body, it will undergo deformation (change the body's shape and size). The deformation can be highly visible, but is often unnoticeable. Generally, the deformation of a body will not be uniform throughout its volume . Beams bend . w. hen . l. oaded. DaVinci-1493. "Of bending of the springs: If a straight spring is bent, it is necessary that its convex part become thinner and its concave part, thicker. This modification is pyramidal, and consequently, there will never be a change in the middle of the spring. You shall discover, if you consider all of the aforementioned modifications, that by taking part '. The failure occurs under a sustained load (or a slowly increasing load) near, but below, the strength under an increasing load, as in a standard test – known as static . fatigue or creep rupture. .. From fig 4 , the decline in the stress necessary to continue deformation past the maximum, point M, seems to indicate that the metal is becoming weaker. However, the cross-sectional area is decreasing rapidly within the neck region, where deformation is occurring. The stress, as computed from . Asady. Al-. Mustansiryah. University . Mechanical Engineering Department. Part 1 : theory. Strain. Simple Strain. Also known as unit deformation, strain is the ratio of the change in length caused by the applied force, to the original length.. ENMAT101A Engineering Materials and Processes. Associate Degree of Applied Engineering . (Renewable Energy Technologies). Lecture 3 – Mechanical Testing. Mechanical Testing. EMMAT101A Engineering Materials and Processes.