Dirk Lukowsky
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View article: Studies of the Cracking of Direct Pressed Laminates
Studies of the Cracking of Direct Pressed Laminates Open
Direct pressed laminate (DPL) is a common surface finish for decorative wood-based panels. It typically consists of one or two papers impregnated with thermosetting resins which are hot pressed directly onto a wood-based carrier board. The…
View article: Evaluation of Four Methods to Determine the Degree of Cure of Melamine-Based Direct Pressed Laminates on Particleboards: Two Improved UV Absorption Methods, the Kiton Test, and Near Infrared Spectroscopy
Evaluation of Four Methods to Determine the Degree of Cure of Melamine-Based Direct Pressed Laminates on Particleboards: Two Improved UV Absorption Methods, the Kiton Test, and Near Infrared Spectroscopy Open
Despite its importance, the determination of the degree of cure of melamine-based laminates often relies on tests with limited accuracy and validity. Undercured surfaces may suffer insufficient resistance to scratching and heat as well as …
View article: Analysis of Wood Bonding Failures that Initiated Before Adhesive Solidification: Air Fingers and Cavitation
Analysis of Wood Bonding Failures that Initiated Before Adhesive Solidification: Air Fingers and Cavitation Open
Bond line openings while an adhesive is still viscous (liquid or paste-like) leave characteristic marks. Air fingers and cavitation develop on the surface of the adhesive when joint parts are fully or partially separated before solidifying…
View article: Studies of the Cracking Behaviour of High-Pressure Laminates
Studies of the Cracking Behaviour of High-Pressure Laminates Open
The European standard EN 438-2 (2019) describes a method to assess the resistance to cracking of high-pressure laminate (HPL). In the EN 438-2 setup, the samples’ shrinkage at a temperature of 50 °C for 6 h is restrained by a metal clamp. …
View article: Material Failure Analysis of Three In-flight Wing Fractures of Wooden Aircraft
Material Failure Analysis of Three In-flight Wing Fractures of Wooden Aircraft Open
Wooden remains of a training acrobatic aircraft, a glider, and a single-seat tailless glider were investigated using visual inspection, microscopic techniques, infrared spectroscopy, mechanical testing, and heat flow thermography. The caus…