Interfacial Aspects of Reinforcement of Wood by Mineral Fibers

1990 ◽  
Vol 197 ◽  
Author(s):  
R.V. Subramanian ◽  
J.M. Park
Keyword(s):  
Interfacial Shear Strength ◽  
Basalt Fiber ◽  
Emission Measurement ◽  
Silane Coupling Agents ◽  
Single Filament ◽  
Surface Flaws ◽  
Strength Tests ◽  
Filament Composite ◽  
Polymeric Silane ◽  
Acoustic Emission Measurement

ABSTRACTSignificant aspects of fiber reinforcement of wood are introduced. The effectiveness of three different silane coupling agents; one monomeric 3-aminopropyltrimethoxy silane, two polymeric aminosilanes (one dimethoxy- and another trimethoxy substituted), was compared by measurement of interfacial shear strength in silane treated single filament composite (SFC) specimens, under dry and wet conditions. The trimethoxypolymeric silane was found to be inferior to the other two, which warrant further investigation in strength tests with basalt fiber reinforced wood specimens. Acoustic emission measurement during the SFC tests has provided evidence for the sizing effect of polymeric silane coatings, as well as for moisture attack at severe surface flaws on the fiber during silane treatment.

Körperschallemission in CFK und Fräswerkzeugen/Acoustic emission in CFRP and milling tools – Analysis of emitted acoustic emission in analogous experiments

2021 ◽  
Vol 111 (07-08) ◽  
pp. 495-500
Author(s):  
Eckart Uhlmann ◽  
Tobias Holznagel ◽  
Sebastian Ospina Mora
Keyword(s):  
Acoustic Emission ◽  
Tool Wear ◽  
Process Monitoring ◽  
Detailed Examination ◽  
Data Driven ◽  
Material Damage ◽  
Emission Measurement ◽  
Wear Rates ◽  
Milling Tools ◽  
Acoustic Emission Measurement

Herausforderungen bei der spanenden Bearbeitung von CFK sind unerwünschte Materialschädigungen im Bauteil sowie hohe Werkzeugverschleißraten. Für diese Arbeit wurden zerstörende Analogversuche an CFK und diamantbeschichteten Hartmetallproben durchgeführt und die Körperschallmesssignale analysiert. Die eingehende Untersuchung der Messwerte aus den Analogversuchen kann zu einer datengetriebenen Parametrierung einer körperschallbasierten Prozessüberwachung für die Fräsbearbeitung von CFK beitragen.   Challenges in machining CFRP are unwanted material damage in the component and high tool wear rates. For this work, destructive analogy experiments were carried out on CFRP and diamond-coated milling tools while analyzing the acoustic emission measurement signals. The detailed examination of the measured values from the analogy experiment can contribute to a data-driven parameterization of an acoustic emission-based process monitoring for the milling of CFRP.

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