14) Indi a) Copper and its alloys do not fail due to cycling loading if the applied stress amplitude is below a certain level. b) Alloys with HCP crystal structure do not fail due to cycling loading if the applied stress amplitude is below a certain level. c) If there exist many slip systems such metals and alloys do not fail due to cycling loading if the applied stress amplitude is below a certain level. d) The practical rule that says there exist a fatigue limit for iron based alloys is not strictly true.

14) Indi a) Copper and its alloys do not fail due to cycling loading if the applied stress amplitude is below a certain level. b) Alloys with HCP crystal structure do not fail due to cycling loading if the applied stress amplitude is below a certain level. c) If there exist many slip systems such metals and alloys do not fail due to cycling loading if the applied stress amplitude is below a certain level. d) The practical rule that says there exist a fatigue limit for iron based alloys is not strictly true.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Material Properties

Construction in civil engineering demands high strength, durability, and longevity. These targets can be achieved by better design and analysis, along with the correct choice of materials. Different materials have different properties and hence, they respond and performs differently under the various condition of external loadings. It is therefore a critical task of an engineer to select the right material based on the property that the material is supposed to function in real-time. When speaking about the property, there are different categories of material properties like chemical property, physical property, mechanical property, electrical property, magnetic property, thermal property, etc. These material properties form the basis of material selection in various applications.

Question

14) Inc
a) Copper and its alloys do not fail due to cycling
loading if the applied stress amplitude is below a
certain level.
b) Alloys with HCP crystal structure do not fail due to
cycling loading if the applied stress amplitude is
below a certain level.
c) If there exist many slip systems such metals and
alloys do not fail due to cycling loading if the
applied stress amplitude is below a certain level.
d) The practical rule that says there exist a fatigue limit
for iron based alloys is not strictly true.
15) Indicate the incorrect expression:
a) Better surface finish would help increase fatigue life.
b) All kinds of inhomogenity would be detrimental in
number of cycles that material can
terms of the
endure regardless of the stress level.
c) Corrosion on a material that has excellent surface
finish would not affect fatigue behavior of that part.
d) Sand blasting as a source of compressive stresses
would be useful under fatigue conditions

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