What is the purpose of the needle valve at the base of the burner. Lab incharge after duly filling in the requisition form. Some of the mechanical properties evaluated in this lab are. Determining the acceleration due to gravity with a simple pendulum your name advanced undergraduate lab, department of physics and astronomy, university of utah, salt lake city, utah 84112 this is an example of a lab report associated with obtaining the acceleration due to gravity g and applying mathematical models. Lab a lab report lab a materials testing 3 point bend.
Bending stress in a beam str5 structures tecquipment. Report in your laboratory reports must have the followings. In the threepoint bending test, the strain gages are located. It is important that all the information necessary to complete the lab report is obtained before students leave the lab. A simple technique, based in a cantilever beam bending test, can be used in educational and training labs using generic laboratory equipment. Uniaxial tension and compression testing of materials nikita khlystov daniel lizardo keisuke matsushita jennie zheng 3. September 22, 2017 by rawan alenezi group 1 abstract beams are significant structural members that used in construction projects.
Experimental protocol for cantilever beam bending test. Lab report requirements general the following suggestions should be helpful. Bending stiffness of a beam can be determined from a forcedisplacement diagram obtained during a threepoint bending test. It tests the ability of unreinforced concrete beam or slab to withstand failure in bending. Report date analysis of the threepointbend test march 197. Flexural strength is a significant parameter for brittle. Bending failure of a softwood beam grain parallel to beam. For example, the boeing 777 was subjected to fullsize static testing to gain. The three point bend test 1 beam theory the three point bend test figure 1 is a classical experiment in mechanics, used to measuretheyoung. To study and examine the flexural properties of materials. Bending test on cantilever beam a to evaluate the deflections of the beam made of wood. Bending of beam lab report essay 1003 words bartleby.
Country, city and institution where the experiment was carried out date of the. Stress patterns in flex testing are complex unlike in tensile or shear. Standard test methods for bend testing of material for ductility1. Tensile strength of concrete beam and timber beam lab report. The data used for this lab report was not gathered from the student run experiments, but rather from standardized testing performed by the laboratory professor, to ensure accurate and consistent results. Flexural or bending test lab report deformation engineering. Fourpoint bending test of determining stressstrain. Each group will deliver one report that should include.
Concepts the linear relationship is hookes law that represents elastic deformation. Pdf experimental study of a fourpoint bending test on clt deep. Uniaxial tension and compression testing of materials. View lab report 145757294flexuralorbendingtestlabreport. For all other cases, it is only approximate and the books term. Explain the characteristics of the most efficient flame for lab experiments. Bending test lab report engr211204 studocu bending moments in a beam str2 structures tecquipment solved bending test obiectives 1 to determine the young continuous and indeterminate beam str structures a theoretical and experimental study on geometric. Aim of this experiment is to study the effect of force of different magnitude on the bending stresses in beam. In this a rectangular bar type sample is supported on two fulcrum points, while the span will be loaded at one or two points subjecting the sample bending loads. Standard test methods for bend testing of material for. Ce330l student lab manual wood flexural strength introduction this section outlines the steps necessary to perform the wood flexural strength lab experiment. In this report the setup used for these tests as well. The purpose of the bending test is to get an idea of the stiffness the bending stiffness of materials. Record should be updated from time to time and the previous experiment must.
The results obtained by different test procedures may not be the same, especially for material with a tendency to crack or fracture. Experimental investigation on inplane behaviour of cross. Lab report has to be formal, neatly written on good sheets in legible handwriting. Pictures of ccommonly used lab equipment and tools. Department of civil and construction engineering strength of. To demonstrate the use of strain gages and associated instrumentation in experimental stress analysis. To demonstrate the use of strain gages and associated instrumentation in. Department of civil and construction engineering strength. The rotating bending test is a fatigue test that allows to evaluate the resistance of the wheel exploiting a rotating bending moment obtained through a rotating unbalanced mass. Flexural or bending test lab report free download as pdf file. A study of diagonal tension failure in reinforced concrete beams.
Curvature, bending moment, and hardness and will also be examined in this lab. A brief description of the test procedure, and a sketch of. Engri 1170, introduction to mechanical engineering cornell university, fall 2009 bending test lab summary. The three point bend test 1 beam theory the three point bend test figure 1 is a classical experiment in mechanics, used to. Students should report to the labs concerned as per the timetable. Bending stresses main depends on the shape of beam, length of beam and magnitude of the force applied on the beam. Experimental bending stress show perfect linear relationship with applied load whereas the theoretical bending stress does not respond that much in increase of applied load. Doc lab deflection of beam docx ayna aziz academia edu lab report bending moment in a simply supported beam how to perform a 3 point bend test on universal testing. Tensile strength of concrete beam and timber beam lab. Introduction understanding material mechanics is critical for engineering. To measure stresses in beams and compare them to the calculated moment and shear force acting on the crosssection of the beam. The elastic modulus in bending e can be extracted from a flexural test. Material testing lab baltimore polytechnic institute. Every student is required to submit his own separate report for each test conducted.
Their primary function is to create the stressstrain curve. To avoid end effects from the shoulders, the length of the transition region should be at least as great as the diameter, and the total length of the reducedsectionshould. The bend test is a simple and cheap qualitative test that can be employed to evaluate both the ductility and soundness of a material. Feb 12, 2017 bending stresses are produce in a beam when an external force is applied on the beam and produce deflection in the beam. For compressive strength test, total 4 cylinders having 100 mm diameter and 200 mm height and 4 cubes 100 mm will be prepared. Lab report shear force in a beam linkedin slideshare. This video shows the bending failure of a simply supported, class c24 softwood beam arranged with the grain parallel to the beam axis. The two semiguided bend test procedures provide radiused surfaces over which the bend is formed. However, a typical format for a lab report is included below.
Steps 1 to 4 of the following instructions may already have been completed for you. The purpose of this experiment is to obtain the tensile, known as modulus of rupture, strength of the concrete material and the wood material using flexural tests performed on concrete beams. Test procedures, sometimes simplified because of time. This first year lab report is an introduction to labs and the mechanical tests upon which the aerospace industry is reliant. Am 317 mechanics lab exp 3 bending stress in a beam test performed. The test provides values for the modulus of elasticity in bending, flexural stress, flexural strain and the flexural stressstrain response of the material.
Place an assembled test frame refer to the separate instructions supplied with the test frame if necessary on a workbench. After testing one sample of each material, a second round of tensile tests were. Experimental protocol for cantilever beam bending test several methods may be used to determine the young modulus and poisson ratio of a material 1. A technical writeup can be compared with a flower garland whose flowers are figures, graphs, pictures and equations. Pdf the four point bending test asphalt concrete response. Bending stress in a beam lab report 1284 words 6 pages.
Chamis lewis research center summary an analysis capability is described for the threepointbend test applicable to materials of linear but unequal tensile and compressive stressstrain relations. In this lab, the active resistive transducers are the electrical resistance strain gages. Students will work in groups of three, and all students are required to contribute to the completion of the lab report. It is often used as a quality control test for buttwelded joints, having the advantage of simplicity of both test pieces and equipment. Flexural or bend testing touchstone testing lab, llc. Aim of this task was to study the effect of different forces on the bending moment in the beam and the result show that there is a linear relationship between bending moment and applied load. It produces its peak stress at the material midpoint and reduced stress elsewhere. Flexural test evaluates the tensile strength of concrete indirectly.
From this simple test, one can determine a reasonable value for the modulus of elasticity. In engineering design, it is very often necessary to test hardware for stress and strain capabilities. This laboratory includes three separate materials testing experiments to be done on spaghetti of at least 3 different diameters. From this simple test, one can determine a reasonable value for the. The purpose of the lab is to determine the modulus of elasticity, e, and the shear modulus, g, of a given sample of wood using static bending. The extensometerloading test was not performed on the porous. This test reproduces a load condition to which the wheel is subject to when in use. During a fatigue test, the stress cycle usually is maintained constant so that the applied stress conditions can be written sm s a where sm is the static or mean stress, and sa is the alternating stress, which is equal to half the stress range. The results of flexural test on concrete expressed as a. Bending of beams experiment report 2654 words bartleby. Each group will test either 3 cubes or cylinders while one specimen will be cast extra.
For flexural strength test, 3 beams having size of 100 x 100 x 500 mm will be prepared. This report presents fourpoint bending tests performed on. Pdf on dec 7, 2016, o katona and others published experimental study of a. Measurement of strain due to bending and axial loads. One of these tests is the four point bending fatigue test. It produces peak stresses along an extended region of the material hence exposing a larger length of the material. If you miss a lab, you will have to do the experiment separately and write the report separately too. Determining the acceleration due to gravity with a simple. Figure 2 bending moment of a beam experiment in the structures frame. If the beam has a uniform crosssection and elastic properties along, the bending stiffness to a concentrated force applied in the midspan can be calculated as k 48ei l3 e 1 where l. Flexural test on concrete significance, procedure and. What was the most difficult part of the glass cutting and bending portion of the lab. The results of flexural test on concrete expressed as a modulus of rupture which denotes as mr in mpa or psi.
Jan 28, 2017 aim of this task was to study the effect of different forces on the bending moment in the beam and the result show that there is a linear relationship between bending moment and applied load. Flexural or bending test measures the bending behavior of beams or beam like samples. The main advantage of a three point flexural test is the ease of the specimen preparation and testing. Background and introduction in lab a, students will evaluate mechanical properties of materials using a three point bending test. Experimental and theoretical bending moment shows perfect linear relationship with applied load with very little difference in the values of bending moment. Analysis of the threepointbend test for materials with unequal tension and compression properties by christos c.
142 1146 1187 110 384 1398 545 583 1277 500 564 1146 301 848 53 274 1193 595 70 637 1192 973 831 642 773 10 379 868 808 1544 395 1555 692 131 590 199 281 1364 279 902 567 614 74 428 297