Journal ArticleDOI
Investigation of Acoustic Emission During Fatigue Loading of Composite Specimens
R.S. Williams,Kenneth Reifsnider +1 more
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TLDR
In this article, a first-order linear relationship between dynamic compliance and totalized acoustic emission was established for bending and load controlled fatigue tests on boron-aluminum and BORON-epoxy angle-plied specimens.Abstract:
Strain and load controlled fatigue tests were run on boron-aluminum and boron-epoxy angle-plied specimens. Acoustic emission data was recorded using a gating technique that eliminated most extraneous noise. Various material parameters were monitored during the test. A good corre lation between acoustic emission and damage extent and propagation was obtained. This was evidenced by an apparent first order linear relationship between dynamic compliance and totalized acoustic emission. A basis for an energy based failure model is formulated and discussed.read more
Citations
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Journal ArticleDOI
Dissipated thermal energy and damage evolution of Glass/Epoxy using infrared thermography and acoustic emission
TL;DR: In this paper, an experimental approach for characterizing energy dissipation and degradation evolution in a woven glass/Epoxy (G10/FR4) laminate subjected to fully reversed bending fatigue test is presented.
Journal ArticleDOI
Analysis of microdamage evolution histories in composites
Yuris A. Dzenis,Jie Qian +1 more
TL;DR: In this paper, a new method of acoustic emission (AE) analysis of histories of different damage mechanisms was formulated based on a combination of transient AE classification and multiparameter filtering.
Journal ArticleDOI
Non-destructive testing of composites
TL;DR: In this article, a number of NDT techniques were evaluated for their applicability to assess internal features such as voids, fibre volume fraction, fibre wash or misoriented fibres, interlaminar and translaminar cracks, lay-up orders, latent defects etc, in fibre-reinforced plastics composites.
Journal ArticleDOI
Andrade and critical time-to-failure laws in fiber-matrix composites: Experiments and model
TL;DR: In this article, a simple model of representative elements, interacting via democratic load sharing, with a large heterogeneity of strengths was proposed to recover the experimental observations of the strain rate as a function of time.
Journal ArticleDOI
Acoustic Emission Monitoring of Fiber Composite Materials and Structures
James H. Williams,Samson S. Lee +1 more
TL;DR: A review of the current acoustic emission literature relating to fiber reinforced composite materials is presented in this paper, where the authors present summary tables which assist m the prompt delineation of the achievements in this research area.
References
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Book ChapterDOI
Fracture mechanics of composites
TL;DR: In this article, the concept of linear-elastic fracture mechanics is introduced and their application to the interpretation of fracture behavior of composite materials is illustrated, based on a description of the linear elastic stress field around the tip of a crack.
Journal ArticleDOI
Determination of fatigue-related heat emission in composite materials: Time-resolved video thermography complemented by other nondestructive-testing and emission techniques have made possible the investigation of energy dissipation in composite materials during fatigue loading
K. L. Reifsnider,R. S. Williams +1 more
Book ChapterDOI
Detection of fiber cracking by acoustic emission.
DO Harris,AS Tetelman,FA Darwish +2 more
TL;DR: In this article, a theoretical model was presented that relates acoustic emission to fiber cracking which occurs during a rising load tension test on a fiber reinforced composite, and the percentage of broken fibers in an Al3Ni fiber reinforced aluminum was measured as a function of tensile strain by optical inspection of the polished surface of strained specimens.
Heat Generation in Composite Materials During Fatigue Loading.
TL;DR: In this paper, two composite materials, boron-epoxy (B/Ep) and Boron-aluminum (b/Al), are monitored during cyclic loading to establish the amount of heat generated by dissipative internal deformation processes.