Hot isostatic pressing is to be used to produce the femoral head components of hip implants made from a novel grade of zirconia. A series of manufacturing trials have demonstrated that the processing route results in post-sintered surface features 43-107 µm (mean 74 µm) in size. In clinical use it is anticipated that the femoral heads will be loaded to maximum stress level of 50% of its tensile strength once implanted. What is the critical flaw size when in service and will the implant require polishing for it to withstand loading during clinical use? Where: • You may assume a value of 1.4 for Y • The grade of zirconia has a Tensile strength of 980 MPa and a fracture toughness of 11 MPa.m0.5
Hot isostatic pressing is to be used to produce the femoral head components of hip implants made from a novel grade of zirconia. A series of manufacturing trials have demonstrated that the processing route results in post-sintered surface features 43-107 µm (mean 74 µm) in size. In clinical use it is anticipated that the femoral heads will be loaded to maximum stress level of 50% of its tensile strength once implanted. What is the critical flaw size when in service and will the implant require polishing for it to withstand loading during clinical use? Where: • You may assume a value of 1.4 for Y • The grade of zirconia has a Tensile strength of 980 MPa and a fracture toughness of 11 MPa.m0.5
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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![Hot isostatic pressing is to be used to produce the femoral head components of hip
implants made from a novel grade of zirconia.
A series of manufacturing trials have demonstrated that the processing route results in
post-sintered surface features 43-107 µm (mean 74 µm) in size. In clinical use it is
anticipated that the femoral heads will be loaded to maximum stress level of 50% of its
tensile strength once implanted.
What is the critical flaw size when in service and will the implant require polishing for it
to withstand loading during clinical use?
Where:
• You may assume a value of 1.4 for Y
• The grade of zirconia has a Tensile strength of 980 MPa and a fracture toughness of 11
MPa.m0.5
Select one or more:
a. 81.8 μm
b. 20.5 μm
c. 40.9 μm
Od. 163.6 μm
De.
O f.
Yes
No](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2f40e488-8d31-4ebf-93c2-8a5fabf31b11%2Fdfad19e9-403a-4df1-9294-7c131e26c372%2Ffwv7gdr_processed.png&w=3840&q=75)
Transcribed Image Text:Hot isostatic pressing is to be used to produce the femoral head components of hip
implants made from a novel grade of zirconia.
A series of manufacturing trials have demonstrated that the processing route results in
post-sintered surface features 43-107 µm (mean 74 µm) in size. In clinical use it is
anticipated that the femoral heads will be loaded to maximum stress level of 50% of its
tensile strength once implanted.
What is the critical flaw size when in service and will the implant require polishing for it
to withstand loading during clinical use?
Where:
• You may assume a value of 1.4 for Y
• The grade of zirconia has a Tensile strength of 980 MPa and a fracture toughness of 11
MPa.m0.5
Select one or more:
a. 81.8 μm
b. 20.5 μm
c. 40.9 μm
Od. 163.6 μm
De.
O f.
Yes
No
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