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Kevlar-polyester
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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001517
EISBN: 978-1-62708-217-4
... to determine the exact nature of the defect. The investigation describes how cross-sectioning, fractography, and chemical analysis were utilized to determine the type of defect responsible for the signal attenuation. Aircraft components Disbonding Laminates Ultrasonic testing Kevlar-polyester (Other...
Abstract
The purpose of this investigation was to determine the cause of the ultrasonic signal attenuation noted during an inspection of a composite aircraft component. Although ultrasonics was able to identify the location of the defective areas, destructive analysis had to be utilized to determine the exact nature of the defect. The investigation describes how cross-sectioning, fractography, and chemical analysis were utilized to determine the type of defect responsible for the signal attenuation.
Image
in Damage Assessment in a Kevlar/Polyester Composite Component
> ASM Failure Analysis Case Histories: Air and Spacecraft
Published: 01 June 2019
Image
in Damage Assessment in a Kevlar/Polyester Composite Component
> ASM Failure Analysis Case Histories: Air and Spacecraft
Published: 01 June 2019
Fig. 11 Cross-section of the kevlar/polyester component at 45 degree angle to the warp and fill fibers. Arrow indicates fiber/matrix disbonds in the exterior ply.
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Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006929
EISBN: 978-1-62708-395-9
.... While attack by aqueous solutions of acids, alkalis, or oxidants is common, the chemical attack of structural plastics by water is somewhat rare. Exceptions are the hot-water degradation of polycarbonate (PC) and thermosetting polyesters as well as the hygroscopic nature of polyamides (PA...
Abstract
This article provides an overview of the physics and math associated with moisture-related failures in plastic components. It develops key equations, showing how they are used to analyze the causes and effects of water uptake, diffusion, and moisture concentration in polymeric materials and resins. It explains how absorbed moisture affects a wide range of properties, including glass transition temperature, flexural and shear modulus,creep, stress relaxation, swelling, tensile and yield strength, and fatigue cracking. It provides relevant data on common polymers, resins, and fiber-resin composites.
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003572
EISBN: 978-1-62708-180-1
..., 70, 76) SFRT (42, 67) 6 Aramid fiber (Kevlar fiber) (AFR) AFR-E (40, 50, 60, 70) AFR-EST (70) AFRT (42, 67) NT, nontreated. Source: Ref 54 Wear behavior of FRP depends on the properties of fibers, their orientations, and bonding with the matrix and the counterface material...
Abstract
This article reviews the abrasive and adhesive wear failure of several types of reinforced polymers, including particulate-reinforced polymers, short-fiber reinforced polymers (SFRP), continuous unidirectional fiber reinforced polymers (FRP), particulate-filled composites, mixed composites (SFRP and particulate-filled), unidirectional FRP composites, and fabric reinforced composites. Friction and wear performance of the composites, correlation of performance with various materials properties, and studies on wear-of failure mechanisms by scanning electron microscopy are discussed for each of these types.