PPT-Let’s Get Cracking ! – Stress/Strain Instruction

Introduction to Stress and Strain Lesson Mechanical Engineers characterize materials using forces stress and strain They analyze the behavior of materials in order to define safety constraints In simple terms they need to determine how much stress can be applied before the material breaks or becomes permanently deformed Biomedical engineers test materials to strengthen or replace tissues or broken bones. 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.,. Multiple . Slip. 27-. 750. Texture, Microstructure & . Anisotropy. A.D. Rollett. ,. Lecture notes originally by:. H. . . Garmestani. (. GaTech. ), . G. . Branco. (FAMU/FSU). Last revised:. 23. . Kinematic modeling of GPS velocities. • . Kinematic strain modeling. assumes. . two-dimensional. . strain compatibility. . (i.e., strain behaves like 2D flow):. . . Interpolates velocity between measurements to. From Noticing to Thriving. Lunch n Learn. 1. This presentation was developed by Organizational Wellness & Learning Systems, Inc.. Objectives. As a result of this session, participants will. Enhance their ability to notice signs of stress and more readily take action to reduce stress. Lunch n Learn. 1. This presentation was developed by Organizational Wellness & Learning Systems, Inc.. Objectives. As a result of this session, participants will. Enhance their ability to notice signs of stress and more readily take action to reduce stress. 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 '. 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 . Stress-Strain Diagram . Suppose that a metal specimen be placed in tension-compression 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 cross-sectional 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 y-axis and the strain ε along the x-axis is called the stress-strain diagram. The stress-strain diagram differs in form for various materials. The diagram shown below is that for a medium carbon structural steel. . 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.. where δ is the deformation and L is the original length, thus ε is dimensionless. . Stress-Strain Diagram . Suppose that a metal specimen be placed in tension-compression 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 cross-sectional 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 y-axis and the strain ε along the x-axis is called the stress-strain diagram. The stress-strain diagram differs in form for various materials. The diagram shown below is that for a medium carbon structural steel. . FINITE ELEMENT ANALYSIS AND DESIGN. Nam-Ho . Kim. STRESS. Stress. Fundamental concept related to the safety of a structure. Often used as criteria for mechanical design. Internal force created by deforming the shape against external loads.. n . be a 3x1 unit vector. What is the physical meaning of . s . n. for . n. =(0,1,0)?. What is the physical meaning of . n. T. s. . n. ? What is the physical meaning of . n. T. s. T. s. . n. ?. What is the physical meaning of . Multiple . Slip. 27-. 750. Texture, Microstructure & . Anisotropy. A.D. Rollett. ,. H. . Garmestani. (. GaTech. ), . G. . Branco. (FAMU/FSU). Last revised:. 14. th. Aug. 2012. 2. Objective. The objective of this lecture is to show how plastic deformation in polycrystals requires . Stress: . when some external system of load acts on a body, the internal forces (equal & opposite) are set up at various section of the body, which resist the external force. This force per unit area at any section is known as stress..