hydraulic and mechanic of materials laboratory (bfc …

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e-Lab MoM Semester I Session 2021/2022 - AFK

ONLINE LABORATORY (e-LAB) INSTRUCTION FOR MECHANICS OF MATERIALS (MoM)

HYDRAULIC AND MECHANIC OF MATERIALS LABORATORY (BFC 21201)

General Report Guideline:

1. e-LAB MoM is an online laboratory or DLS (Distance Laboratory Simulation)

version for Mechanics of Material Laboratory instructions. It consists of SIX (6)

main sections, which are e-LAB 1, e-LAB 2, e-LAB 3, e-LAB 4, e-LAB 5 and

e-OEQ. Each question from each section must be answered in order.

2. Each group (max. of 5 students) are allowed to prepare the e-LAB MoM report

using hand writing or computerized.

3. The e-LAB MoM is conducted in alternate modes between physical

attendance and video simulations, with respective mode is allowed for

maximum of 3 groups (or 15 students)

4. Please provide all rubrics (cognitive, affective and psychomotor) at the front

page of the report. Complete the names of group members, matric no. and

section. All report must be converted to pdf format and sent via Author

platform in Week 8 (1st half group) / Week 15 (2nd half group).

Prepared by: CLUSTER OF STRUCTURES AND MATERIALS ENGINEERING

FACULTY OF CIVIL ENGINEERING AND BUILT ENVIRONMENT

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TABLE OF CONTENTS:

TITLE PAGE

e-LAB 1: Shear force and shear stress in beam 4-5

e-LAB 2: Bending moment and bending stress in beam 6-7

e-LAB 3: Deflection of beam 8-9

e-LAB 4: Buckling of compression member 10-11

e-LAB 5: Mechanical properties of tension member 12-13

e-OEQ : Open Ended Questions 14

Rubrics 15

Course Learning Outcomes (CLO):

1. Explain the results of hydraulics and mechanics of materials experiments

based on relevant standard and theories. [PLO4, C2]

2. Display high quality of technical and interpretation skills in solving the assign

problems. [PLO5, P4]

3. Describe the laboratory testing procedures among group members throughout

experiments. [PLO9, A2]

Distribution of Learning Domains from the e-LAB MoM Questions

Figure (i) shows the distributions of e-LAB

MoM questions according to respective

learning domains. The questions are

designed for the assessment of cognitive

domain at maximum C2 level. Open ended

question is provided up to C5 level.

A few questions are also designed to

assess the affective and psychomotor

domains. The domains are evaluated

during the online interaction and meeting

minute provided by each group with

respective lecturer. Figure (i)

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General Instructions:

This online laboratory (e-LAB) learning is designed for Mechanics of Materials. It

consists of FIVE (5) e-LABs and e-OEQ. You are required to complete all e-LABs

questions. Figure (ii) shows the flow chart on the implementation and timelines of e-

LAB MoM.

Figure (ii)

Lab. task: Distribution of laboratory variables to every

group

e-LAB MoM: Demonstration of laboratory

simulation using: a) Practical (physical

attendance) - PA b) Laboratory simulation

(pre-corded video) - LSV

Start

Briefing: Implementation of e-LAB MoM

e-report: Online submission of e-LAB MoM report via

Author platform

Groups’ formation: Maximum of FIVE (5) students

Lecturer

Students

Notes: - Assessment of psychomotor

domain will be evaluated via PA activities

- Assessment of affective domain will be evaluated via LSV activities.

Notes: - Assessment of cognitive

domain is evaluated from e-lab report.

End

1st half: Week 1 2nd half: Week 7


1st half: Week 2-7 2nd half: Week 8-14


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e-LAB (CLO 1): Shear Force and Shear Stress in Beam

1. In this experiment, you will determine the shear force and shear stress of the

beam at the cut-section. Carry out the following instructions, referring to

Figure 1.1.

Figure 1.1

(a). Place the hangers at any positions along the beam. Please consult with

your respective lecturer for the total number of hangers to be used in this

experiment. You are allowed to use any configurations of mass on each

hanger without exceed the limit of WTOTAL < 300 g.

(i) From Table 1.1, fill the particulars of the mass configurations.

(C1, PLO 4)

Force Digital Meter

Pinned Support

SHEAR FORCE IN BEAM

Vx

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Table 1.1

(ii) Sketch the free body diagram of the beam.

(C1, PLO 4)

(iii) Calculate shear force at cut-section for each load cases, and complete

Table 1.1 from the findings of laboratory test.

(C2, PLO 4)

(iv) Discuss the outcomes from question 1a(ii) in terms of the external

forces and shear force relationships. You may use any type of

graphical illustrations as part in your discussions.

(C2, PLO 4)

(v) Calculate and sketch shear stress distribution at the cut-section for any

load cases, if the cross section of the beam is 20 mm of width and 3

mm of thickness.

(C2, PLO 4)

Load Cases

W1 (N) W2 (N) W3 (N) W4 (N)

Vx (N) at cut-section

Calculations Laboratory

1

2

3

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e-LAB 2 (CLO 1): Bending Moment and Bending Stress in Beam

2. In this experiment, you will determine the bending moment and bending stress

of the beam at the cut-section. Carry out the following instructions, referring to

Figure 2.1.

Figure 2.1

(a). Place the hangers at positions with mass configurations and load cases

similar to e-LAB 1 procedure.

(i) Sketch the free body diagram of the beam.

(C1, PLO 4)

Force Digital Meter

Pinned Support

Vx Mx

BENDING MOMENT IN BEAM

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(ii) From Table 2.1, complete the calculations of shear force and bending

moment at cut section. Compare your calculation with laboratory

findings.

(C2, PLO 4)

Table 2.1

(iii) Discuss the outcome from question 2a(ii) in terms of the accuracy of

the testing, and the relationships between the external forces and

bending moment.

(C2, PLO 4)

(iv) Calculate and sketch bending stress distribution at the cut-section from

any load cases, if the cross section of the beam is similar to e-LAB 1.

You may use any type of graphical illustrations as part in your

discussions.

(C2, PLO 4)

Load Cases Vx (N)

Mx (Nmm) at cut-section

Calculations Laboratory Calculations Laboratory

1

2

3

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e-LAB 3 (CLO 1): Deflection of Beam

3. In this experiment, you will determine the maximum deflection (Ymax) of the

beam. Carry out the following instructions, referring to Figure 3.1.

Figure 3.1

(a). Place the hangers at positions with mass configurations and load cases

similar to e-LAB 1 procedure.

(i) Sketch the free body diagram of the beam.

(C1, PLO 4)

X (in mm)

Support

Sample Deflection dial gauge

DEFLECTION OF BEAM

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(ii) Complete Table 3.1. Carry out calculations and laboratory testing for

the maximum deflection from every load case. Take similar beam cross

section as in e-LAB 1. You are allowed to use any deflection methods

in your calculations.

(C2, PLO 4)

Table 3.1

(iii) Discuss the outcome from question 3a(ii) in terms of the external forces

and the maximum deflection relationships from this experiment. You

may use any type of graphical illustrations as part in your discussions.

(C2, PLO 4)

Load Cases

Provide X (mm), to archive the maximum

deflection (Ymax)

Ymax (mm)

Calculations Laboratory

1

2

3

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e-LAB 4 (CLO 1): Buckling of Compression Member

4. In this experiment, you will determine the critical buckling load (Pcr) of

aluminum strut. Carry out the following instructions by referring to Figure 4.1.

Figure 4.1

(a). Place each length of aluminum strut on the apparatus according to

respective end restraints conditions.

BUCKLING OF STRUTS

Aluminum Strut

End restraint condition

End restraint condition

Pinned Fixed

Pinned

Pinned

Fixed

Fixed

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(i) From Table 4.1, complete the calculations of Pcr for each size and end

restrain condition.

(C2, PLO 4)

Table 4.1

(ii) Compare the outcome from the calculations made in 4a(i) with the

laboratory results. You may use any type of graphical illustrations as

part in your discussions in order to explain the relationship between

both parameters (end restraints and strut length) against Pcr.

(C2, PLO 4)

(iii) Using the Euler buckling curve shows in Figure 4.2, identify the

classification of the compression member for each aluminum strut

length at respective end restraint conditions.

(C2, PLO 4)

Figure 4.2

Strut length (mm)

Pcr, End Restraint Conditions

Pined-Pinned (N)

Pinned-Fixed (N)

Fixed-Fixed (N)

370

470

520

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e-LAB 5 (CLO 2): Mechanical properties of tension member

5. Please refer to specific code of practice of BS EN ISO 6892-1: 2019 to

conduct the tensile testing for a reinforcement bar (rebar) using 1000 kN of

Universal Testing Machine (UTM). Please find related technical specification

for this UTM machine with the model number GT-7001-LSU 100 from the

website: https://mobile.gotech.biz/product_info?n=137. Carry out the

following instructions by referring to Figure 5.1. Please request the rebar Ø

(mm) and the stress-strain curves testing output from respective lecturer, to

answer the following questions.

Figure 5.1

https://mobile.gotech.biz/product_info?n=137

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(i) Recognize the standard safety operational procedure to be fulfilled

before conducting this testing. Provide any related images or sketches

illustrations as part in your discussions.

(A2, PLO 9)

(ii) Establish the sample preparations prior to sample installation and

testing. Provide any related images, sketches or schematic diagram as

part in your discussions.

(P2, PLO 5)

(iii) Complete the values in Table 5.1.

(P3, PLO 5)

Table 5.1

(iv) Produce a standard testing procedure (SOP) for tensile testing of your

rebar according to BS EN ISO 6892-1: 2019. Provide any related

graphical or schematic diagram if necessary.

(P4, PLO 5)

(v) Discuss whether the strength of this steel rebar is satisfied to the

standard code of practice.

(P4, PLO 5)

Yield Strength (MPa), σy

Ultimate Strength (MPa), σult

Ratio of σult / σy

Elastic region From: to:

Plastic region From:

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e-OEQ: Open Ended Question

OE 1 :

What are the main purposes to conduct laboratory/ experiment on the structural

members?

OE 2:

How significant the outcome from laboratory/ experiment is assuredly proven to be

as a reliable finding?

OE 3:

What are the alternative methods to provide reliable finding without doing laboratory/

experiment?

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