Manufacturing and Strength Evaluation of Composite Threads

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F26%3A0200088" target="_blank" >RIV/00216305:26210/26:0200088 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.4028/p-kwrD21" target="_blank" >http://dx.doi.org/10.4028/p-kwrD21</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.4028/p-kwrD21" target="_blank" >10.4028/p-kwrD21</a>

Result language
angličtina
Original language name
Manufacturing and Strength Evaluation of Composite Threads
Original language description
This study evaluates the direct machining of internal threads in glass fiber-reinforced (GFRP) and carbon fiber-reinforced (CFRP) composite materials, comparing the performance of cutting taps, conventional thread milling, and orbital thread milling. GFRP and CFRP samples were prepared and drilled under optimized conditions to minimize delamination, followed by thread production using the three different technologies. Visual and microscopic inspections revealed that orbital thread milling consistently produced the highest thread quality with minimal fiber damage, while cutting taps resulted in the most defects. Tensile testing showed that, in GFRP, orbital thread milling achieved the highest maximum load (18.05 kN), only slightly exceeding other methods. In CFRP, thread strength was similar across all technologies for 4 mm thick samples (around 4 kN), but increasing the thickness to 8 mm nearly doubled the strength, regardless of the threading method. The results demonstrate that orbital thread milling is optimal for thread quality, but in CFRP, material thickness is the dominant factor influencing joint strength. Direct threading in composites is feasible when appropriate machining parameters and technologies are applied.
Czech name
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Czech description
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Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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