TY - JOUR
T1 - Ultrasonic welding of CF/PPS composites with integrated triangular energy directors
T2 - melting, flow and weld strength development
AU - Villegas, Irene Fernandez
AU - Palardy, Genevieve
PY - 2017/6/13
Y1 - 2017/6/13
N2 - This paper presents a fully experimental study on melting, flow and weld strength development during ultrasonic welding of CF/PPS composites with integrated triangular energy directors. The main goal of this research was assessing whether the heating time to achieve maximum weld strength could be significantly reduced as compared to ultrasonic welding with flat energy directors. The main conclusion is that, in the specific case under study, the triangular energy directors did heat up, melt and collapse approximately two times faster than the time it took for the flat energy directors to melt and significantly flow. However the heating time needed to achieve maximum weld strength for the integrated triangular energy directors did not differ drastically from that for flat energy directors. This was caused by the fact that a fully welded overlap was not directly achieved right after the collapsing of the triangular energy directors. Instead a solidified resin-rich interface was created which needed to be re-melted as a whole in order to achieve a fully welded overlap and hence maximum weld strength.
AB - This paper presents a fully experimental study on melting, flow and weld strength development during ultrasonic welding of CF/PPS composites with integrated triangular energy directors. The main goal of this research was assessing whether the heating time to achieve maximum weld strength could be significantly reduced as compared to ultrasonic welding with flat energy directors. The main conclusion is that, in the specific case under study, the triangular energy directors did heat up, melt and collapse approximately two times faster than the time it took for the flat energy directors to melt and significantly flow. However the heating time needed to achieve maximum weld strength for the integrated triangular energy directors did not differ drastically from that for flat energy directors. This was caused by the fact that a fully welded overlap was not directly achieved right after the collapsing of the triangular energy directors. Instead a solidified resin-rich interface was created which needed to be re-melted as a whole in order to achieve a fully welded overlap and hence maximum weld strength.
KW - flat energy directors
KW - Thermoplastic composites
KW - triangular energy directors
KW - ultrasonic welding
UR - http://www.scopus.com/inward/record.url?scp=84990037000&partnerID=8YFLogxK
UR - http://resolver.tudelft.nl/uuid:f897bd5b-a8be-4364-af2b-ca65ab3e36b8
U2 - 10.1080/09276440.2017.1236626
DO - 10.1080/09276440.2017.1236626
M3 - Article
AN - SCOPUS:84990037000
SN - 0927-6440
VL - 24
SP - 515
EP - 528
JO - Composite Interfaces (Print)
JF - Composite Interfaces (Print)
IS - 5
ER -