You work for an off-shore wind turbine manufacturer and have been asked to review data from the support structure development team. The cost of the high strength steel currently used in the support structure has increased significantly in the last 12 months so the development team have manufactured some components to an identical design using a cheaper grade of structural steel. Company policy states that the critical tensile stress must be 30% more than the expected maximum in service stress of 420MPa. Given the information below, what is critical tensile stress of the cheaper grade of structural steel and would you recommend its use in the wind turbine support structure? Alternate Steel Analysis Report: • Detected maximum internal flaw size = 1.0 μm, • Specific surface energy 1.3 J/m2, • Youngs Modulus = 210GPa Select one or more: a.590 MPa b.Yes, would recommend c.417 MPa d.13.2 MPa e.No, would not recommend f.18.6 MPa

You work for an off-shore wind turbine manufacturer and have been asked to review data from the support structure development team. The cost of the high strength steel currently used in the support structure has increased significantly in the last 12 months so the development team have manufactured some components to an identical design using a cheaper grade of structural steel. Company policy states that the critical tensile stress must be 30% more than the expected maximum in service stress of 420MPa. Given the information below, what is critical tensile stress of the cheaper grade of structural steel and would you recommend its use in the wind turbine support structure? Alternate Steel Analysis Report: • Detected maximum internal flaw size = 1.0 μm, • Specific surface energy 1.3 J/m2, • Youngs Modulus = 210GPa Select one or more: a.590 MPa b.Yes, would recommend c.417 MPa d.13.2 MPa e.No, would not recommend f.18.6 MPa

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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Question

You work for an off-shore wind turbine manufacturer and have been asked to review data
from the support structure development team. The cost of the high strength steel
currently used in the support structure has increased significantly in the last 12 months so
the development team have manufactured some components to an identical design using
a cheaper grade of structural steel. Company policy states that the critical tensile stress
must be 30% more than the expected maximum in service stress of 420MPa. Given the
information below, what is critical tensile stress of the cheaper grade of structural steel
and would you recommend its use in the wind turbine support structure?
Alternate Steel Analysis Report:
• Detected maximum internal flaw size = 1.0 μm,
● Specific surface energy 1.3 J/m2,
● Youngs Modulus = 210GPa
Select one or more:
a.590 MPa
b.Yes, would recommend
c.417 MPa
d.13.2 MPa
e.No, would not recommend
f.18.6 MPa

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