Page 1 of 3 All the best Dr. / Mahmoud Tawfik

Kafrelsheikh University

Subject: Engineering Materials And Testing

Faculty of Engineering

Course Code: 40111

Mechanical Engineering Dept.

Academic Year: 2022/2023

Mechatronics Program

Level 1

Dr. Mahmoud Tawfik

SHEET (1): Tension Test

1- A round tensile specimen with an initial gage length of 100 mm, fixed as per

ASTM specification, shows after fracture a gage length of 130 mm and a

minimum diameter of 21 mm at fracture. If the load corresponding to the 0.2%

offset yield is 160 kN, that at the point of the onset of necking is 200 kN and

that at the point of fracture is 170 kN, determine the following:

(a) 0.2% offset yield strength.

(b) UTS.

(c) (i) Fracture strength and (ii) applied true fracture strength.

(d) (i) Elongation and (ii) true strain at fracture.

(e) (i) Reduction of area and (ii) true reduction of area at fracture.

(f) Zero-gage-length elongation.

2- A 250-mm-long rod with an initial diameter of 25 mm is stretched under a

tensile load of 4 kN. If thediameter of the rod reduces to 22 mm at this load,

assuming constancy in volume, calculate the following:

(a) The corresponding final length of the rod.

(b) The corresponding true stress and strain.

(c) The corresponding engineering stress and strain.

3- A 100-mm-long member made of an aluminium alloy with a rectangular cross-

section of 20 mm by 15 mm is subjected to a tensile load of 32 kN. Assuming

linear elastic behaviour with Young’s modulus of 72 GPa and Poisson’s ratio

of 0.3, determine the total change in (a) length, (b) cross-sectional dimensions,

and (c) volume.

4- A tension test was performed on an alloy and the results were as follows:

Load (lb)

0

1000

3200

5200

7200

8000

8300

8600

8700

8800

Tensile test sheet - good

fliud mechanics (2222222)

جامعة كفر الشيخ

Comments

Students also viewed

Related documents

Preview text

Page 1 of 3 All the best Dr. / Mahmoud Tawfik

Kafrelsheikh University Subject: Engineering Materials And Testing

Faculty of Engineering Course Code: 40111

Mechanical Engineering Dept. Academic Year: 2022/

Mechatronics Program Level 1

Dr. Mahmoud Tawfik

SHEET (1): Tension Test

1- A round tensile specimen with an initial gage length of 100 mm, fixed as per

ASTM specification, shows after fracture a gage length of 130 mm and a

minimum diameter of 21 mm at fracture. If the load corresponding to the 0%

offset yield is 160 kN, that at the point of the onset of necking is 200 kN and

that at the point of fracture is 170 kN, determine the following:

(a) 0% offset yield strength.

(b) UTS.

(c) (i) Fracture strength and (ii) applied true fracture strength.

(d) (i) Elongation and (ii) true strain at fracture.

(e) (i) Reduction of area and (ii) true reduction of area at fracture.

(f) Zero-gage-length elongation.

2- A 250-mm-long rod with an initial diameter of 25 mm is stretched under a

tensile load of 4 kN. If thediameter of the rod reduces to 22 mm at this load,

assuming constancy in volume, calculate the following:

(a) The corresponding final length of the rod.

(b) The corresponding true stress and strain.

(c) The corresponding engineering stress and strain.

3- A 100-mm-long member made of an aluminium alloy with a rectangular cross-

section of 20 mm by 15 mm is subjected to a tensile load of 32 kN. Assuming

linear elastic behaviour with Young’s modulus of 72 GPa and Poisson’s ratio

of 0, determine the total change in (a) length, (b) cross-sectional dimensions,

and (c) volume.

4- A tension test was performed on an alloy and the results were as follows:

Load (lb) 0 1000 3200 5200 7200 8000 8300 8600 8700 8800

Page 2 of 3 All the best Dr. / Mahmoud Tawfik

Elongation (in.)

0 0 0 0 0 0 0 0 0 0.

A sample of 0 inch diameter and 2 inch standard length was used in the

test. Appoint: the stress-strain curve - proportional limit stress - proof stress

of 0% – modulus of elasticity - modulus of resilience – ultimate tensile

strength - elongation percent.

5- A tension test is performed on a sample of steel 8 mm in diameter and gauge

length of 8 cm and the following table shows the load and elongation

counterparts:

Load (kg) 0 700 1150 1600 1360 1390 1665 1920 2150 1660

Elongation

(mm)

0 0 0 0 0 1 2. 53 3 14 24.

Draw a curve graph of load and elongation was then appointed as follows:

Yield stress - tensile strength - modulus of elasticity - modulus of resilience -

the maximum stress - the percentage of elongation - modulus of toughness.

6- A tension test is done on a sample of mild steel with cross sectional area of 125

mm2 and gauge length of 8 cm and the results of the experiment were as

follows:

Load (kg) 0 1820 3640 4750 4650 4950 6500 6900 7050 5850 4800

Elongation (mm)

0 0 0 0 1 5 15 25 35 48 48.

Draw the force - elongation curve and hence determine the following:

yield stress - tensile strength - modulus of elasticity - modulus of resilience -

the maximum stress - the percentage of elongation - modulus of toughness. -

The true stress and true strain when carrying a load of 6500 kg – the expected

shape of fracture for this sample.

7- A tension test is made on a sample of steel and the diameter of the sample was

d = 1 cm. An elongation percent of 34% and 30% for lengths of 5 d and 10

d respectively were measured. In a tension test on a sample of another type of