7/25/2019 CY 3

1/2

JAY SHRIRAM GROUP OF INSTITUTIONS TIRUPUR-638 660

DEPARTMENT OF MECHANICAL ENGINEERING

SUBJECT CODE/NAME: CE6306 /STRENGTH OF MATERIALS DATE: 26/09/201

YEAR: II !A " B# SEM:III BRANCH:MECH

SUB: CYCLE TEST-III

MA$ MAR%: 2

ANS&ER ALL 'UESTIONS

PART-A !#

1) What are the assumptions made in torsion equation

2) Difference between open and closed coiled helical spring.PART-B

(10)1) A hollow shaft of diameter ratio 3/8 is required to transmit 588W at 11! rpm. "he ma#imum

torque e#ceeds the mean b$ %!&. "he shear stress is limited to '3 (/mm% and the twist should

not be more than !.!!81 rad. alculate the e#ternal diameter required satisf$ing both the

conditions. "ae *+8,*pa- length+3m.

(10)%) An open coiled helical spring made of 5mm diameter wire has 1' coils- 1!!mm inner diameter

with heli# angle of 1' degree. alculate the deflection- ma#imum direct and shear stressesinduced due to an a#ial load of 3!!(."ae *+!*pa and +%!!*pa.

FACULTY IN CHARGE HOD

7/25/2019 CY 3

2/2

JAY SHRIRAM GROUP OF INSTITUTIONS TIRUPUR-638 660

DEPARTMENT OF MECHANICAL ENGINEERING

SUBJECT CODE/NAME: CE6306 /STRENGTH OF MATERIALS DATE: 26/09/201

YEAR: II !A " B# SEM:III BRANCH:MECH

SUB: CYCLE TEST-III

MA$ MAR%: 2

ANS&ER ALL 'UESTIONSPART-A !#

1) What are the assumptions made in torsion equation0%) Difference between open and closed coiled helical spring.

PART-B(10)

1) A hollow shaft of diameter ratio 3/8 is required to transmit 588W at 11! rpm. "he ma#imum

torque e#ceeds the mean b$ %!&. "he shear stress is limited to '3 (/mm% and the twist should

not be more than !.!!81 rad. alculate the e#ternal diameter required satisf$ing both the

conditions. "ae *+8,*pa- length+3m. (10)

%) An open coiled helical spring made of 5mm diameter wire has 1' coils- 1!!mm inner diameterwith heli# angle of 1' degree. alculate the deflection- ma#imum direct and shear stressesinduced due to an a#ial load of 3!!(."ae *+!*pa and +%!!*pa.

FACULTY IN CHARGE HOD