TY - JOUR
T1 - Ultrasonic welding of thermoplastic composites
T2 - A comparison between polyetheretherketone and low-melt polyaryletherketone as resin in the adherends and energy directors
AU - Brito, C. B.G.
AU - Teuwen, J.
AU - Dransfeld, C. A.
AU - Villegas, I. F.
PY - 2025
Y1 - 2025
N2 - Our aim with this work was to evaluate how the thermoplastic resin used in the composite adherends and on the energy director affected the static ultrasonic welding process in both parallel and misaligned configurations. Polyetheretherketone (PEEK) and low-melt polyaryletherketone (LMPAEK) were the resins used and their thermomechanical properties were characterized via dynamic-mechanical analysis and modulated differential scanning calorimetry. With parallel adherends, neither the welding time nor the through-thickness heating in the adherends vary significantly. This similarity was attributed to a larger heat capacity of the PEEK energy director counterbalancing its higher viscoelastic heating rate. With misaligned adherends, the welding time was larger for PEEK welds than for LMPAEK welds and LMPAEK adherends presented a larger though-thickness heating. These effects were attributed to the larger bulk viscoelastic heating rate of carbon fibre reinforced/LMPAEK adherends adding up to the lower heat capacity of LMPAEK.
AB - Our aim with this work was to evaluate how the thermoplastic resin used in the composite adherends and on the energy director affected the static ultrasonic welding process in both parallel and misaligned configurations. Polyetheretherketone (PEEK) and low-melt polyaryletherketone (LMPAEK) were the resins used and their thermomechanical properties were characterized via dynamic-mechanical analysis and modulated differential scanning calorimetry. With parallel adherends, neither the welding time nor the through-thickness heating in the adherends vary significantly. This similarity was attributed to a larger heat capacity of the PEEK energy director counterbalancing its higher viscoelastic heating rate. With misaligned adherends, the welding time was larger for PEEK welds than for LMPAEK welds and LMPAEK adherends presented a larger though-thickness heating. These effects were attributed to the larger bulk viscoelastic heating rate of carbon fibre reinforced/LMPAEK adherends adding up to the lower heat capacity of LMPAEK.
UR - http://www.scopus.com/inward/record.url?scp=85217808730&partnerID=8YFLogxK
U2 - 10.1016/j.compositesb.2025.112264
DO - 10.1016/j.compositesb.2025.112264
M3 - Article
AN - SCOPUS:85217808730
SN - 1359-8368
VL - 296
JO - Composites Part B: Engineering
JF - Composites Part B: Engineering
M1 - 112264
ER -