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Effect of Deformation Condition on Axial Compressive Precision Forming Process of Tube with Curling Die
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作者 He YANG and Zhichao SUN College of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2001年第1期135-136,共2页
The effect of the deformation condition on the axial compressive precision forming process of tube with curling die was investigated by using a rigid-plastic FEM. The results show that the forming accuracy depends mai... The effect of the deformation condition on the axial compressive precision forming process of tube with curling die was investigated by using a rigid-plastic FEM. The results show that the forming accuracy depends mainly on geometric condition rp/d0, little on tube material properties and friction condition; the relative gap △/2rp of double-walled tubes obtained decreases with Increasing rp/d0, and there is a parameter k for a given to/do or rp/t0, when rp/d0 >k, △/2rp< 1, otherwise △/2rp>1. 展开更多
关键词 Effect of Deformation Condition on axial Compressive Precision Forming Process of tube with Curling Die
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Temperature effect on buckling properties of ultra-thin-walled lenticular collapsible composite tube subjected to axial compression 被引量:4
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作者 Bai Jiangbo Xiong Junjiang 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2014年第5期1312-1317,共6页
This paper seeks to outline the temperature effect on the buckling properties of ultra-thin-walled lenticular collapsible composite tube(LCCT) subjected to axial compression.The buckling tests of the LCCT specimens ... This paper seeks to outline the temperature effect on the buckling properties of ultra-thin-walled lenticular collapsible composite tube(LCCT) subjected to axial compression.The buckling tests of the LCCT specimens subjected to axial compression were carried out on INSTRON-500 N servo-hydraulic machine in dry state and at the temperatures of 25 C, 100 C and 80 C. The load–displacement curves and buckling initiation loads were measured and the buckling initiation mechanism was discussed from experimental observations. Experiments show that the buckling initiation load, on average, is only about 2.2% greater at the low temperature of 80 C than at the room temperature of 25 C due to the material hardening, demonstrating an insignificant increase in the buckling initiation load, whereas it is about 19.5% lower at the high temperature of 100 C than at the room temperature owing to the material softening, implying a significant decrease in the buckling initiation load. The failure mode of the LCCT in axial compression tests at three different temperatures can be reckoned to be characteristic of the buckling initiation and propagation around the central region until rupture. The finite element(FE) model is presented to simulate the buckling initiation mechanism based on the eigenvalue-based methodology. Good correlation between experimental and numerical results is achieved. 展开更多
关键词 axial compression Buckling Composite Finite element analysis Lenticular collapsible tube
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