CE 6411 – STRENGTH OF MATERIALS LABORATORY MANUAL DEPARTMENT OF CIVIL ENGINEERING
CE 6411 – STRENGTH OF MATERIALS LABORATORY MANUAL GENERAL INSTRUCTIONS FOR LABORATORY CLASSES Enter Lab with CLOSED FOOTWEAR. Boys should “TUCK IN” the shirts. Students should wear uniform only. LONG HAIR should be protected, let it not be loose especially near ROTATING MACHINERY. POWER SUPPLY to your test table should be obtained only through the LAB TECHNICIAN. Do not LEAN and do not be CLOSE to the rotating components. TOOLS, APPARATUS & GUAGE Sets are to be returned before leaving the Lab. HEADINGS & DETAILS should be neatly written, 1. Aim of the experiment 2. Apparatus / Tools/ Instruments required 3. Procedure / Theory / Algorithm / Program 4. Model Calculations 5. Neat Diagram/ Flow charts 6. Specifications/ Designs details 7. Tabulation 8. Graph 9. Result 10. Inference. • After completing the experiments, the answer to the VIVA-VOCE Questions for the FACULTY.
CE 6411 – STRENGTH OF MATERIALS LABORATORY MANUAL As per ANNA UNIVERSITY::CHENNAI REGULATION – 2013 SYLLABUS LIST OF EXPERIMENTS LTPC 0032 1. Tension Test On Mild Steel Rod 2. Compression Test On Wood 3. Double Shear Test On Metal 4. Torsion Test On Mild Steel Rod 5. Impact Test On Metal Specimen (Izod And Charpy) 6. Hardness Test On Metals (Rockwell And Brinell Hardness Tests) 7. Deflection Test On Metal Beam 8. Compression Test On Helical Spring 9. Deflection Test On Carriage Spring 10.Test On Cement
TENSION TEST ON MILD STEEL ROD Experiment No.: Date: Aim: To conduct tension test on the given mild steel rod for determining the yield stress, ultimate stress, breaking stress, percentage of reduction in area, percentage of elongation over a gauge length and young’s modulus. Apparatus required: Universal Testing Machine, Mild Steel Rod, Vernier caliper/Scale. Theory: The tensile test is most applied one, of all mechanical tests. In this test ends of test piece and fixed into grips connected to a straining device and to a load measuring device. If the applied load is small enough, the deformation of any solid body is entirely elastic. An entirely deformed solid will return to its original form as soon as load is removed. However, if the load is too large, the material can be deformed permanently. The initial part of the tension curve, which is recoverable immediately after unloading ,is termed as elastic and the rest of the curve, which represents the manner in solid undergoes plastic deformation is termed as plastic. The stress below which the deformation is essentially entirely elastic is known as the yield strength of material. In some materials the onset of plastic deformation is denoted by a sudden drop in load indication both an upper and a lower yield point. However, some materials do not exhibit a sharp yield point. During plastic deformation, at larger extensions strain hardening cannot compensate for the decrease in section and thus the load passes through the maximum and then begins to decrease. At this stage the “ultimate strengths”, which is defined as the ratio of the load on the specimen to the original cross sectional are, reaches the maximum value. Further loading will eventually cause „nick‟ formation and rupture. Usually a tension testis conducted at room temperature and the tensile load is applied slowly. During this test either round of flat specimens may be used. The round specimens may have smooth, shouldered or threaded ends. The load on the specimen is applied mechanically or hydraulically depending on the type of testing machine.