TY - JOUR
T1 - Towards robust sequential ultrasonic spot welding of thermoplastic composites
T2 - Welding process control strategy for consistent weld quality
AU - Zhao, Tian
AU - Broek, Charlotte
AU - Palardy, Genevieve
AU - Villegas, Irene Fernandez
AU - Benedictus, Rinze
PY - 2018/6/1
Y1 - 2018/6/1
N2 - The research in this paper is an essential part of a bigger effort on developing robust sequential ultrasonic welding of multi-spot welded joints in thermoplastic composites. It mainly focused on assessing the impact of the changes in boundary conditions on the welding process and whether it could be circumvented by using an appropriate process control strategy. A two-step approach was followed by investigating: (1) the effect of boundary conditions on displacement- and energy-controlled single-spot welded joints and (2) displacement- and energy-controlled sequential ultrasonic welding of double-spot welded joints. The results showed that previous spots indeed affect the energy required to obtain an optimum new welded spot, which challenges the use of energy-controlled welding for this application. Contrarily, displacement-controlled welding was shown to provide consistent-quality welds with a constant set of welding parameters and it was hence identified as the most promising welding strategy for sequential ultrasonic welding of thermoplastic composites.
AB - The research in this paper is an essential part of a bigger effort on developing robust sequential ultrasonic welding of multi-spot welded joints in thermoplastic composites. It mainly focused on assessing the impact of the changes in boundary conditions on the welding process and whether it could be circumvented by using an appropriate process control strategy. A two-step approach was followed by investigating: (1) the effect of boundary conditions on displacement- and energy-controlled single-spot welded joints and (2) displacement- and energy-controlled sequential ultrasonic welding of double-spot welded joints. The results showed that previous spots indeed affect the energy required to obtain an optimum new welded spot, which challenges the use of energy-controlled welding for this application. Contrarily, displacement-controlled welding was shown to provide consistent-quality welds with a constant set of welding parameters and it was hence identified as the most promising welding strategy for sequential ultrasonic welding of thermoplastic composites.
KW - Fractography
KW - Joints/joining
KW - Mechanical properties
KW - Thermoplastic resin
UR - http://www.scopus.com/inward/record.url?scp=85044122608&partnerID=8YFLogxK
UR - http://resolver.tudelft.nl/uuid:5c580a1c-986b-475f-9e90-5013684cab1d
U2 - 10.1016/j.compositesa.2018.03.024
DO - 10.1016/j.compositesa.2018.03.024
M3 - Article
AN - SCOPUS:85044122608
SN - 1359-835X
VL - 109
SP - 355
EP - 367
JO - Composites Part A: Applied Science and Manufacturing
JF - Composites Part A: Applied Science and Manufacturing
ER -