TY - JOUR
T1 - On sequential ultrasonic spot welding as an alternative to mechanical fastening in thermoplastic composite assemblies
T2 - A study on single-column multi-row single-lap shear joints
AU - Zhao, Tian
AU - Rans, Calvin
AU - Fernandez Villegas, Irene
AU - Benedictus, Rinze
PY - 2019/5/1
Y1 - 2019/5/1
N2 - In previous work, single-spot ultrasonically welded joints were found to feature similar load carrying capability in shear but significantly low capability in peel as joints with a representative single-mechanical fastener. This leads to questioning welding as an appropriate solution for the commonly-used single-lap joint configuration. The present paper investigates the mechanical performance of spot welded single-lap joints in thermoplastic composites in comparison to their mechanically fastened counterparts. Single-row joints, double-row joints with varying inter-row distance and multi-row joints with varying number of rows were investigated in this study. The results showed that, owing to higher joint stiffness and hence lower secondary bending and peel stresses, the load carrying capability of the spot welded joints was comparable to that of the mechanically fastened joints in all considered cases. Likewise, the effects of increasing the inter-row distance and of increasing the number of rows were similar for both types of the joints.
AB - In previous work, single-spot ultrasonically welded joints were found to feature similar load carrying capability in shear but significantly low capability in peel as joints with a representative single-mechanical fastener. This leads to questioning welding as an appropriate solution for the commonly-used single-lap joint configuration. The present paper investigates the mechanical performance of spot welded single-lap joints in thermoplastic composites in comparison to their mechanically fastened counterparts. Single-row joints, double-row joints with varying inter-row distance and multi-row joints with varying number of rows were investigated in this study. The results showed that, owing to higher joint stiffness and hence lower secondary bending and peel stresses, the load carrying capability of the spot welded joints was comparable to that of the mechanically fastened joints in all considered cases. Likewise, the effects of increasing the inter-row distance and of increasing the number of rows were similar for both types of the joints.
KW - Fractography
KW - Joints/joining
KW - Mechanical properties
KW - Thermoplastic resin
UR - http://www.scopus.com/inward/record.url?scp=85067937568&partnerID=8YFLogxK
U2 - 10.1016/j.compositesa.2019.02.013
DO - 10.1016/j.compositesa.2019.02.013
M3 - Article
AN - SCOPUS:85067937568
SN - 1359-835X
VL - 120
SP - 1
EP - 11
JO - Composites Part A: Applied Science and Manufacturing
JF - Composites Part A: Applied Science and Manufacturing
ER -