Figure shows a hollow quarry drill bit in operation. When drilling, it experiencesresistive torques T1 = 10 kNm at A, T2=26kNm at B. A pushing compressive force (in x direction)is also applied 25 kN at C generating a compressive stress σxx in AB and BC. The hollow part of the drill bit is used to pump coolant at a pressure such that it generates a circumferential stress of Oyy= 20 MPa. The dimensions of the drill are given in Table .i The maximum principal stress for part AB (in MPa)ii The maximum principal stress for part BC (in MPa)iii The part of the drill (AB or BC) and location of brittle failure plane withrespect to drill bit axis. Figure Q4(B)(a) shows a hollow quarry drill bit in operation. When drilling, it experiencesresistive torques T1=10 kNm at A, T2 kNm at B. A pushing compressive force (in x direction)is also applied P kN at C generating a compressive stress G in AB and BC. The hollow part ofthe drill bit is used to pump coolant at a pressure such that it generates a circumferential stressof Gy = 20 MPa. The dimensions of the drill are given in Table Q4(B).Table Q4(B)Outer diameter ABInner diameter ABOuter diameter BCInner diameter BC100 mm80 mm150 mm80 mmDetermine:a) The maximum principal stress for part AB (in MPa)b) The maximum principal stress for part BC (in MPa)c) The part of the drill (AB or BC) and location of brittle failure plane withrespect to drill bit axis.T1T2вP Outer diameter ABInner diameter ABOuter diameter BC100 mm80 mm150 mm80 mmInner diameter BC

Answered: Image /qna-images/answer/d6a204b5-a661-4319-99d9-6e3dd5195e34.jpg

Answered: Figure Q4(B)(a) shows a hollow quarry…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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Figure shows a hollow quarry drill bit in operation. When drilling, it experiences
resistive torques T1 = 10 kNm at A, T2=26kNm at B. A pushing compressive force (in x direction)
is also applied 25 kN at C generating a compressive stress σxx in AB and BC. The hollow part of the drill bit is used to pump coolant at a pressure such that it generates a circumferential stress of O_yy= 20 MPa. The dimensions of the drill are given in Table .

i The maximum principal stress for part AB (in MPa)

ii The maximum principal stress for part BC (in MPa)

iii The part of the drill (AB or BC) and location of brittle failure plane with
respect to drill bit axis.

Figure Q4(B)(a) shows a hollow quarry drill bit in operation. When drilling, it experiences
resistive torques T1=10 kNm at A, T2 kNm at B. A pushing compressive force (in x direction)
is also applied P kN at C generating a compressive stress G in AB and BC. The hollow part of
the drill bit is used to pump coolant at a pressure such that it generates a circumferential stress
of Gy = 20 MPa. The dimensions of the drill are given in Table Q4(B).
Table Q4(B)
Outer diameter AB
Inner diameter AB
Outer diameter BC
Inner diameter BC
100 mm
80 mm
150 mm
80 mm
Determine:
a) The maximum principal stress for part AB (in MPa)
b) The maximum principal stress for part BC (in MPa)
c) The part of the drill (AB or BC) and location of brittle failure plane with
respect to drill bit axis.
T1
T2
в
P

Outer diameter AB
Inner diameter AB
Outer diameter BC
100 mm
80 mm
150 mm
80 mm
Inner diameter BC

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