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damage modes

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Published: 01 August 2005
Fig. 8.30 Schematic failure modes of impact damage in composites. (a) High-energy impact damage. (b) Medium-energy impact damage. (c) Low-energy impact damage More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130111
EISBN: 978-1-62708-284-6
... can all be thought of as damage modes. The term damage mode or failure mode is best used to describe what damage is present. Much confusion has occurred because of the tendency of engineers to use the terms mechanism and mode interchangeably; in doing so, it is unclear that two distinct...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540319
EISBN: 978-1-62708-309-6
... loading can lead to delamination, the primary failure mode of most composites, and describes some of the methods that have been developed to improve delamination resistance, assess damage tolerance, determine residual strength, and predict failure modes. composite laminate damage tolerance...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490183
EISBN: 978-1-62708-340-9
... Abstract This chapter covers the failure modes and mechanisms associated with boiler components and the tools and techniques used to assess damages and predict remaining component life. It begins with a review of the design and operation of a utility boiler and the materials used...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780417
EISBN: 978-1-62708-281-5
... in the resin of a carbon-fiber composite laminate that failed in mode I fatigue loading. Striations cover the surfaces of several fibers. 1000× Impact damage is another form of loading that can result in specific interlaminar fracture characteristics in composite materials. In general, a delamination...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110652
EISBN: 978-1-62708-247-1
... occurs only after one of the pins has been grounded. The actual failure mode for both types is identical for the potential imposed upon the lead-frame, and normally results in a unique failure signature far internal to the die consisting of gate oxide damage at the first Input buffer. This location...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490001
EISBN: 978-1-62708-340-9
... Abstract The ability to accurately assess the remaining life of components is essential to the operation of plants and equipment, particularly those in service beyond their design life. This, in turn, requires a knowledge of material failure modes and a proficiency for predicting the near...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490265
EISBN: 978-1-62708-340-9
... Abstract This chapter covers the failure modes and mechanisms of concern in steam turbines and the methods used to assess remaining component life. It provides a detailed overview of the design considerations, material requirements, damage mechanisms, and remaining-life-assessment methods...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250257
EISBN: 978-1-62708-345-4
... modes of contact-fatigue damage has been recognized, but the factors that control the nucleation and propagation of each type are only partially understood. The contact fatigue of hardened steel has been the subject of extensive research using analytical and experimental methods, and publications have...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110587
EISBN: 978-1-62708-247-1
... common failure mode. Insulation coating of the wire could be damaged by mechanical stress, during winding, or the wire is over heated by excessive current (during application), and so on. Open mode failure may occur by excess current and/or a defect in terminal soldering. A damaged core, such as cracking...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430325
EISBN: 978-1-62708-253-2
... restriction in free movement in that region. Creep-Fatigue Interaction Creep-fatigue interaction is a complex process of damage involving creep deformation and cyclic stresses, and the predominant damage mode can range from fatigue crack growth at higher frequencies and lower temperatures to creep...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610377
EISBN: 978-1-62708-303-4
... on the surface, the matrix damage may be significant, and therefore, its ability to stabilize the fibers in compression may be seriously degraded. Because of this, tolerance to impact damage is often the critical design consideration, and compression is the critical loading mode. Fig. 25 Impact damage...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270067
EISBN: 978-1-62708-301-0
... Abstract A low-pressure turbine rotor blade failed in service, causing extensive engine damage. A section of the blade broke off around 25 mm from the root platform, producing a flat fracture surface that appeared smooth on one end and grainy elsewhere. Based on their examination, investigators...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630101
EISBN: 978-1-62708-270-9
... 6, “Basic Single-Load Fracture Modes,” in this book, ductile fractures are those in which the shear stress exceeds the shear strength before any other mode of fracture can occur. Therefore, the micromechanism of fracture is in the shear direction, but this is not always obvious on macroexamination...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540379
EISBN: 978-1-62708-309-6
... between smooth specimen and cracked specimen types of damage evaluation, and as a conceptual crack length that quantitatively indicates when a transition in the mode of damage analysis is necessary. Many variables, including geometry, material, and loading conditions, influence the value of a i , which...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030148
EISBN: 978-1-62708-282-2
... is available in the article “ Modes of Fracture ” in Fractography , Volume 12 of ASM Handbook , formerly Metals Handbook , 9th ed. Classification of Hydrogen Processes The specific types of hydrogen damage have been categorized in order to enhance the understanding of the factors that affect...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270115
EISBN: 978-1-62708-301-0
... Abstract Two compressor rotors of similar design and construction were severely damaged during operation. In one rotor, all the blades in the third and fourth stages had been sheared off and some had lifted from the dovetail portion of the drum. The damage in the other rotor was more extensive...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270084
EISBN: 978-1-62708-301-0
... Abstract An aircraft tire burst while inflating, causing one of the flanges on the wheel hub to fracture. This chapter provides a summary of the investigation along with key findings. It includes images of the damaged hub and describes how various parts failed as the pressure in the tire...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1985
DOI: 10.31399/asm.tb.sagf.t63420185
EISBN: 978-1-62708-452-9
... resulted from torsional fatigue in the tensile plane, originating from one of several gouge marks observed around the shaft at the splined radius. The fatigue crack progressed for a large number of cycles before final fracture. The mode of failure was torsional fatigue in the tensile plane...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270102
EISBN: 978-1-62708-301-0
... range. Testing Procedure and Results Macroexamination The bevel and spur gears along with the failed dowel bolts in position are shown in Fig. CH17.1 . All six bolts failed inside the bevel gear. The fracture surfaces of the halves held in the spur gear were damaged. Those in the bevel gear...