Holographic evaluation of edge delamination in bars bonded to a rigid support with foam-adhesive

Article Abstract:

A simple holographic method has been developed for quick detection and assessment of artificially created edge delamination in bars having one end bonded to a rigid support with foam-adhesive. The bar is modelled as being partially clamped model with an equivalent slope at its support that is related to its foundation modulus. Two dimensionless parameters, related linearly for a nondelaminated bonding but nonlinearly for a delaminated one, have been defined. Conventional holographic techniques are unable to determine the condition of adhesion in such bars.

Methods, Analysis, Holographic testing, Bars (Engineering), Bars (Metal)

---

Estimating the location and depth of normal cracks in cantilevers from holographic fringe patterns

Article Abstract:

The detection, location and assessment of normal cracks in arbitrarily clamped cantilevers were done by means of a simple method. The results obtained could be extended to cantilevers with inclined cracks and resilient clamped-ends. However, the bending equation should be linearized first along with a makeover of the finite element analysis. Improvements in accuracy and sensitivity measurements were obtained through the use of digital holography which enabled detection and assessment of finer cracks.

Research, Finite element method, Steel bars, Steel bar, Holographic interferometry

---

Estimation of size and depth of debonds in laminates from holographic interferometry

Article Abstract:

Debonds were simulated by embedding two mylar sheets into a six-ply woven roving glassfiber reinforced plastic plate which was then subjected to holographic exposure under atmospheric and vacuum stress. The holograms show that the debond farthest from the illuminated surface is greatly affected by rigid-body motion due to its slight fringe patterns. Experiment results and sources of error vary depending on the debond profile and depth considered.

Testing, Holography, Laminated materials, Laminates

Similar abstracts:

• Abstracts: Effects of solution chemistry on the partitioning of phenanthrene to sorbed surfactants. Cyclodextrin-enhanced electrokinetic removal of phenanthrene from a model clay soil
• Abstracts: Downwind distribution of all-cancer relative risk about a point source: single source with reactive and unreactive plumes
• Abstracts: NMR spectroscopic investigation of hydrogen bonding in atrazine. Atrazine hydrogen-bonding potentials
• Abstracts: Quantification of uncertainty in reactivity adjustment factors from reformulated gasolines and methanol fuels
• Abstracts: Optimization of ultrasonic irradiation as an advanced oxidation technology. Decomposition of parathion in aqueous solution by ultrasonic irradiation

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.