Strength of Materials Lab (Diploma)

Tensile, compression, hardness, impact and torsion tests on materials.

6 MonthsDuration 6Chapters26Topics

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Syllabus · पाठ्यक्रम

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01Tension Test on Mild Steel 6 topics

Universal Testing Machine (UTM) parts and working
Preparing and marking the specimen, gauge length
Load-extension observations and stress-strain curve
Limit of proportionality, yield point, ultimate and breaking stress
Percentage elongation and percentage reduction in area
Young's modulus from the straight portion of the graph

02Compression Test 4 topics

Compression test on cast iron specimen
Compression test on timber along and across grain
Crushing strength of bricks / concrete cubes
Types of failure of brittle and ductile materials in compression

03Hardness Tests 4 topics

Brinell hardness test: ball, load and BHN formula
Rockwell hardness test: B and C scales
Vickers hardness test (introduction)
Precautions and surface preparation

04Impact Tests 4 topics

Izod impact test: specimen and notch
Charpy impact test: specimen and notch
Energy absorbed and impact strength
Effect of notch and temperature on toughness

05Torsion Test 4 topics

Torsion testing machine
Torque - angle of twist graph
Modulus of rigidity G = T L / (J theta)
Shear stress at the surface of a shaft

06Deflection of Beams and Springs 4 topics

Deflection of simply supported and cantilever beams
Verification of Maxwell's reciprocal theorem
Stiffness of a close-coiled helical spring
Lab record, graphs and viva

About

You will be able to

Perform the tension test on mild steel on a UTM and find yield stress, ultimate stress, percentage elongation and reduction in area
Carry out compression tests on cast iron, timber and concrete / brick specimens
Find Brinell and Rockwell hardness numbers of common metals
Perform Izod and Charpy impact tests and compare the toughness of materials
Find the modulus of rigidity of a shaft material by the torsion test
Record observations neatly, plot graphs and write the lab file and viva answers

Who it is for

Diploma Mechanical Engineering students of Semester 3 (BTEUP)
Diploma Civil and Production students taking a materials testing lab
Students who want to prepare for lab viva and practical exams

What you need

Theory of Strength of Materials (stress, strain, elastic constants) studied in the same semester

Questions

Which experiments are done in this lab?

Tension, compression, hardness (Brinell and Rockwell), impact (Izod and Charpy), torsion, and beam and spring deflection tests.

Will I get help with the lab file and viva?

Yes. Each experiment covers the aim, apparatus, procedure, observation table, calculation, result and common viva questions.

Is this course based on the BTEUP syllabus?

Yes. The units follow the BTEUP (Board of Technical Education, Uttar Pradesh) diploma syllabus. If your polytechnic follows a different board or a revised scheme, the centre teaches your own syllabus.