TY - JOUR
T1 - Experimental investigation of novel pre-tightened teeth connection technique for composite tube
AU - Li, Fei
AU - Zhao, Qilin
AU - Chen, Haosen
AU - Xu, Longxing
N1 - Publisher Copyright:
Copyright © 2017 Techno-Press, Ltd.
PY - 2017/2/10
Y1 - 2017/2/10
N2 - A new composite tube connection method called the pre-tightened teeth connection technique is proposed to improve the composite tube connection efficiency. This paper first introduces the manufacturing process of the proposed technique. It then outlines how the mechanical properties of this technology were tested using four test groups. The factors that influence the load-bearing capacity and damage model of the connection were analyzed, and finally, the transfer load mechanism was investigated. The following conclusions can be obtained from the research results. (1) The new technique improves the compressive connection efficiency by a maximum of 79%, with the efficiency exceeding that of adhesive connections of the same thickness. (2) Changing the depth of teeth results in two types of damage: local compressive damage and shear damage. The bearing capacity can be improved by increasing the depth, length, and number of teeth as well as the pre-tightening force. (3) The capacity of the technique to transfer high loads is a result of both the relatively high interlaminar shear strength of the pultruded composite and the interlaminar shear strength increase provided by the pre-tightening force. The proposed technique shows favorable mechanical properties, and therefore, it can be extensively applied in the engineering field.
AB - A new composite tube connection method called the pre-tightened teeth connection technique is proposed to improve the composite tube connection efficiency. This paper first introduces the manufacturing process of the proposed technique. It then outlines how the mechanical properties of this technology were tested using four test groups. The factors that influence the load-bearing capacity and damage model of the connection were analyzed, and finally, the transfer load mechanism was investigated. The following conclusions can be obtained from the research results. (1) The new technique improves the compressive connection efficiency by a maximum of 79%, with the efficiency exceeding that of adhesive connections of the same thickness. (2) Changing the depth of teeth results in two types of damage: local compressive damage and shear damage. The bearing capacity can be improved by increasing the depth, length, and number of teeth as well as the pre-tightening force. (3) The capacity of the technique to transfer high loads is a result of both the relatively high interlaminar shear strength of the pultruded composite and the interlaminar shear strength increase provided by the pre-tightening force. The proposed technique shows favorable mechanical properties, and therefore, it can be extensively applied in the engineering field.
KW - Composite tube
KW - Connection efficiency
KW - Influence factors
KW - Pre-tightened teeth connection
UR - http://www.scopus.com/inward/record.url?scp=85012093088&partnerID=8YFLogxK
U2 - 10.12989/scs.2017.23.2.161
DO - 10.12989/scs.2017.23.2.161
M3 - Article
AN - SCOPUS:85012093088
SN - 1229-9367
VL - 23
SP - 161
EP - 172
JO - Steel and Composite Structures
JF - Steel and Composite Structures
IS - 2
ER -