Li Han
Jaguar Land Rover
Spot weldingEngineeringFatigue limitComposite materialMetallurgyShear strengthMaterials scienceWeldingJoint (geology)Aluminium alloyAlloyMechanical strengthHead (vessel)AluminiumAutomotive industryRivetStructural engineeringMechanical engineeringShear (sheet metal)Fretting
37Publications
17H-index
750Citations
Publications 37
Newest
#1Dezhi LiH-Index: 15
#2Li HanH-Index: 17
Last. Mike ShergoldH-Index: 10
view all 4 authors...
For high strength aluminium alloys, such as AA6008T61 and AA6111 PFHT, when they are joined as the bottom material by self-piercing riveting (SPR), they tend to crack at the joint buttons. These cracks, especially those penetrated to the rivets, may cause galvanic corrosion problem with the steel rivet. In this paper, the mechanical strength of four stack/die combinations with different joint button cracking severity was studied before and after salt-spray corrosion test. The results showed that...
Source
#1Dezhi LiH-Index: 15
#2Geraint WilliamsH-Index: 39
Last. Mike ShergoldH-Index: 10
view all 4 authors...
1 CitationsSource
#1Mario Carandente (Jaguar Land Rover)H-Index: 1
#2Richard Dashwood (Warw.: University of Warwick)H-Index: 28
Last. Li Han (Jaguar Land Rover)H-Index: 17
view all 4 authors...
Self-piercing riveting (SPR) has been widely used over recent years in the automotive industry to join lightweight aluminium structures. However, the extensive experimental trials needed to assess the feasible rivet/die combinations within a body in white assembly facility present a serious constraint for the application of this process on a large manufacturing scale. Therefore, having a virtual tool able to assess or predict the feasibility of a rivet/die combination is of primary importance fo...
28 CitationsSource
#1Dezhi Li (Warw.: University of Warwick)H-Index: 15
#2Li Han (Jaguar Land Rover)H-Index: 17
Last. Geraint Williams (Warw.: University of Warwick)H-Index: 39
view all 5 authors...
In order to reduce vehicle weight to increase fuel efficiency and reduce C02 emission, more and more automotive manufacturers are now using lightweight materials, such as aluminium, to build part of or the whole body-in-white structure. Due to the advantages over other joining techniques, self-piercing riveting (SPR) is a main joining technique for aluminium structures. In this paper, the effect of setting velocity/force on the joint quality and performance was studied. It was found that in the ...
8 CitationsSource
#1Dezhi Li (Warw.: University of Warwick)H-Index: 15
#2Li Han (Jaguar Land Rover)H-Index: 17
Last. Geraint Williams (Warw.: University of Warwick)H-Index: 39
view all 5 authors...
Self piercing riveting (SPR) is one of the major joining technologies for aluminium structures due to its advantages over some of the more traditional joining technologies. In this paper, the mechanisms of crack initiation and growth during fatigue and the influence of fatigue on the stiffness and remaining static strengths of SPR joints in both lap shear and T peel configurations were studied. The results showed that cracks could initiate and develop from different locations on the substrate ma...
32 CitationsSource
#1Dezhi Li (Warw.: University of Warwick)H-Index: 15
#2Li Han (Jaguar Land Rover)H-Index: 17
Last. Geraint Williams (Warw.: University of Warwick)H-Index: 39
view all 5 authors...
Due to the drive from legislations, fuel efficiency, and CO2 emission, the application of aluminium lightweight structures in automotive industry have been increased significantly. Self piercing riveting (SPR) has been one of the major joining technologies for aluminium structures due to its advantages to some traditional joining technologies. There are some standard parameters that will influence the joint quality and mechanical strengths of an SPR joint. However, even for the same parameters u...
12 CitationsSource
#1Dezhi Li (Warw.: University of Warwick)H-Index: 15
#2Li Han (Jaguar Land Rover)H-Index: 17
Last. Mike Shergold (Jaguar Land Rover)H-Index: 10
view all 4 authors...
Self-piercing riveting (SPR) is one of the main joining methods for lightweight aluminium automotive body structures due to its advantages. In order to further optimise the structure design and reduce the weight but without compromising strength, reduction of redundant materials in the joint flange area can be considered. For this reason, the influence of rivet to sheet edge distance on the fatigue strengths of self-piercing riveted joints was studied. Five edge distances, 5 mm, 6 mm, 8 mm, 11.5...
29 CitationsSource
#1Dezhi Li (Warw.: University of Warwick)H-Index: 15
#2Li Han (Jaguar Land Rover)H-Index: 17
Last. Mike Shergold (Jaguar Land Rover)H-Index: 10
view all 5 authors...
Currently, self-piercing riveting (SPR) is a major technology used by manufacturers to join aluminium body structures to reduce vehicle weight. Normally, for SPR of one specific stack more than one die, rivet, and velocity combination can be applied. Which parameter combination is chosen is depending on the surrounding joints. In order to increase productivity and reduce the number of robots used, it is preferred to use the same rivet/die combination for as many joints as possible. This means fo...
12 CitationsSource
#1Martin Thornton (Warw.: University of Warwick)H-Index: 10
#2Li Han (Jaguar Land Rover)H-Index: 17
Last. Mike Shergold (Jaguar Land Rover)H-Index: 10
view all 3 authors...
Abstract An ultrasonic C-scan technique was evaluated for non-destructive testing (NDT) of resistance spot welding of aluminium. It was established through fundamental trials that removal of surface indentation from the welding electrode is necessary in order to obtain credible non-destructive assessments of aluminium spot weld size and shape. The non-destructive test results showed good correlation with peeled samples and metallographic cross sections. The technique also provided further fundam...
35 CitationsSource
#1Dezhi Li (Warw.: University of Warwick)H-Index: 15
#2Li Han (Warw.: University of Warwick)H-Index: 17
Last. Mike Shergold (Jaguar Land Rover)H-Index: 10
view all 4 authors...
Self-piercing riveting is one of the main joining methods for construction of aluminium body structures in the automotive industry. In order to optimise vehicle mass it is desirable to use minimum flange widths, which has implications with respect to the rivet to sheet edge distance and consequently joint quality and strength. The influence of the rivet to sheet edge distance, referred as edge distance, on the quality and strength of self-piercing riveted joints was evaluated using standard alum...
38 CitationsSource