# ME136P Lab Report 1

September 16, 2017 | Author: Jason Dignos | Category: Strength Of Materials, Ultimate Tensile Strength, Screw, Tension (Physics), Machines

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MAPUA INSTITUTE OF TECHNOLOGY SCHOOL OF MECHANICAL AND MANUFACTURING ENGINEERING

ME136P / A4 Engineering Materials, Processes and Testing

Experiment no. 1 Physical Study of Universal Testing Machine

Torralba, Refael Jan C.

Date Performed: August 4, 2015

2013106979

Date Submitted: August 18, 2015

Engr. Rj Lawrence Tiu

Engr. Rj Lawrence Tiu OBJECTIVES To familiarize on the different parts and operation of the Universal Testing Machine. INTRODUCTION A universal testing machine, also known as a universal tester, materials testing machine or material test frame is a machine that is used to test the tensile strength and compressive strength of materials. Students should first be familiarized with the machines capabilities before performing an experiment to give them an idea on how it will be used to test the materials and also to be aware to the solutions of possible hazards that may occur during the experiment to prevent any accidents that may harm the students. Figure 1 shows the loading unit of UTM and Figure 2 shows the measuring unit of UTM.

RELATED RESEARCH

Figure 2. Measuring Unit of UTM

As a Mechanical Engineering student it is necessary to have knowledge of mechanical properties of engineering materials because it will be used in our future designs, fabrications and constructions. It is called universal testing machine because it can perform many different test such as tensile, compressive, bend, etc. for us to be able to examine the materials mechanical properties. It can perform these tests by applying external force to the material which has three main elements: loading unit, control measuring unit and hydraulic unit for loading. The results from the test are commonly used to know the application of the material and to predict how it will react under other types of force. Tensile test is clamping a single piece of material on each of its ends and pull it apart until it breaks. This measures how strong it is (tensile strength) how stretchy it is (elongation), and how stiff it is (tensile modulus). Compression test is the opposite of tensile test in which you compress an object between two level plates until a certain load or distance has been reached or the product breaks. The typical measurements are the maximum force sustained before breakage, or load at displacement, or displacement at load. The materials that can be used in the UTM operations are metal, rubber, plastic, leather, asbestos, PVC, paper, textile, wire, plywood, ceramics, resins etc. but not all kinds of these materials can be used in all UTM because there are different designs of UTM and each of which are specialize to test a different level of strength of the materials.

LIST OF APPARATUS/MATERIALS 

Shimadzu Universal Testing Machine UH-A-C Series

Computer Controlled Hydraulic Servo System

PROCEDURES 1. Discussion of Mechanical properties of materials and parts of UTM 2. Be familiarized on the different parts of the Universal testing machine by labelling an actual picture of the UTM of Mapua Institute of Technology.

Figure 3. Control Measuring Unit with labelled parts

FINAL DATA SHEET

Drive screw Tension nut cap Lower cross head

Tabl e

Table top protective mat

Bed cover Table cover

Ram

Bed

Manual Operation panel

Front cover

Power control unit Automatic control panel

QUESTIONS WITH ANSWERS 1. Illustrate the Universal Testing Machine

2. Give the Functions of each single part. Parts of the UTM: Loading cylinder – Used to convert fluid power into mechanical motion. Ram – Where the load is applied. Bed – The base of the Loading Unit. Table – The place where the specimen that will be used for testing is placed. Lower crosshead – Used to clamp testing specimen from below. Upper crosshead – Used to clamp testing specimen from top. Drive screw – Provides a particularly favourable flow of force during the test, enabling direct load application to the specimen. Column – Usually have ball-screw drives to position the moveable crosshead. It can also be used to determine the force capacity of the machine. Tension nut cap – Controls the tension in the machine.

Drive screw fixing nut – A type of fastener, typically made of metal, and characterized by a helical ridge, known as a male thread (external thread) or just thread, wrapped around a cylinder Elevation motor – It allows the lower crosshead to move upward and downward allowing it to compress and rupture the material. Table roller guide – It allows you to place the material precisely. Table cover – Covers the table. Bed cover – Covers the bed. Table top protective mat – Protects the table from any debris that may cause scratches or damage to the table. Upper rear cover – Covers the upper part of the measuring unit. Lower rear cover – Covers the lower part of the measuring unit. Power switch – Turns the machine on and off. Casing – Contains most of the component of the measuring unit. Front cover – Covers the lower front of the universal measuring unit. Power control unit – Controls the power of the measuring unit. Manual operation panel – Controls the measuring unit operation manually. Automatic operation panel – Controls the measuring unit operation automatically. Zero span adjustment panel – Is the range of a physical property being measured which is correlated to a representative range of a signal or indicator. Load range selector panel – It allows you to control the amount or range of load that will be applied. Load display meter – It shows you the load that has been applied. Memory card – It stores all the data gathered by the machine. 3. Enumerate the uses of Universal Testing Machine.    

To inspect the batch quality and consistency of material. To determine the properties of unknown material. It can measure the tensile strength, elongation and stiffness of material Measures the compressive strength of a material

DISCUSSION Universal testing machine (UTM) is named after the fact that it can perform many standard tensile and compression tests on materials, components, and structures. Tensile strength test is where you stretch a material until it breaks to measure how strong, stretchy, and stiff a material is.