Analysis of a resin socket termination for a wire rope

Abstract

A finite element model to determine the socket strains and resin pressures in a resin socket termination for a wire rope has been developed. This model takes account of the relative movement between the socket and the resin cone that occurs when a termination is under load. To verify the accuracy of the model, computed socket strains were compared with strain measurements both on a full-scale termination and on a laboratory-scale model. As a result of these comparisons, modifications were made to the finite element model to improve its accuracy. It was concluded that the wires were held in the socket by frictional forces which were effective only in the resin section between 10 and 50 per cent of the socket basket length (measured from the front of the socket). This conclusion was verified by further laboratory tests.It was therefore deduced that manufacturing defects in the back half of the socket would not reduce the strength of the termination, while defects in the front half are much more significant. This was also demonstrated by laboratory tests for both quasi-static and fatigue loading. These conclusions apply only to sockets of the type described in this paper and are not necessarily true for all socket designs.

Mechanism of bonding between Zn–Al-coated wires and Zn–Cu alloy casting medium in hot casting socket terminations for large bridge cables

“…This means that poor cleaning of the wire before casting causes premature destruction of the bonding in the socket terminations. This is in agreement with the findings of previous studies on small rope sockets [1,18]. Indeed, the importance of proper cleaning of the wires before casting requires more careful consideration for bridge cable sockets than for small rope sockets because the ratio of cross section to bonding surface of wires embedded in a bridge socket is smaller than that in a rope socket.…”

“…However, almost all the CA7 specimens could withstand the ultimate tensile force owing to the simple addition of the small cavity angle to the casting medium. This indicates that another bonding mechanism, the so-called wedging effect [1,2,18] produced by friction between the surface of the wire and the conical casting medium, significantly increased the bonding resistance of the socket terminations. The casting temperatures of the Zn-Cu alloy in the CT510 and CT560 specimens were 510°C and 560°C, respectively, which were higher than that of the BAS specimens (460°C).…”

Comparison of white metal and resin socket terminations for wire ropes

“…The authors' previous research demonstrated the behaviour of resin socket terminations designed in accordance with the US Federal Speci®cation RR-S-550D [8]. The main conclusions from this work were:…”

“…Previous work by the authors [8,9] demonstrated clearly how a resin-®lled socket termination operated. This investigation prompted the question: is the operating mechanism the same for an otherwise identical socket made with white metal?…”

Effect of the Tapered Angle on the Ultimate Load Factors of PPWS Sockets in Main Cables of Suspension Bridges

“…로프 구조의 소형 스펠터 소켓의 경우, 합성수지를 주입재로 사용한 소켓의 상세 해석법 및 거동 특징 (Brandon et al, 2001) 검토하여 PPWS 소켓의 기본적인 기하형상과 설계변수를 결정 한다 (Komura et al, 1990;JIS F 3432, 1995 (Brandon et al, 2001). 그러나 설계상의 편의를 위하여 압축응력은 Fig.…”