Author
Yumei Huang
Bio: Yumei Huang is an academic researcher. The author has contributed to research in topics: Finite element method & Joint (geology). The author has an hindex of 1, co-authored 1 publications receiving 16 citations.
Topics: Finite element method, Joint (geology)
Papers
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TL;DR: In this article, a joint modeling method based on the principle that the basic characteristic parameters of the joints equal the material strain energy is presented. And the results show that the virtual material model can provide a theoretical basis for the accurate joint modeling.
29 citations
Cited by
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01 Jan 1999
TL;DR: In this paper, the effects of the threads on the bolt and member stiffness were evaluated on a set of bolted joints, including 24, 20, 16, 12, and 8mm-dia bolts.
Abstract: Axisymmetric finite element analysis (FEA) was performed on bolted joints to determine the effects of the threads on the bolt and member stiffnesses. For steel members, the member stiffness decreased 37.1, 37.7, 38.2, 41.0, and 49.4 percent for the 24, 20, 16, 12, and 8-mm-dia bolts, as the magnitude of the external load was increased. The external load was increased from zero to the value that caused the bolt force to equal its proof strength. The member stiffness for aluminum members decreased by 22. 7 and 29.9 percent for the 24 and 20-mm bolts. The cast iron members had decreases of 26.9 and 32.3 percent for the 24 and 20-mm bolts. Likewise, the aluminum/cast iron members decreased in stiffness by 25.5 and 30.0 percent for the 24 and 20-mm bolts. The member stiffness with no external load applied decreased by approximately 65 percent when changing from steel to aluminum members, 53 percent from steel to cast iron, and 60 percent from steel to aluminum/cast iron. Bolt stiffness varied less than 1.4 percent over the total range of the externally applied load for each of the bolted joint models. The decrease in bolt stiffness for the 24 and 20-mm-dia bolts was approximately 4 percent when changing from steel to aluminum members, 7 percent when changing from steel to cast iron members, and 8 percent when changing from steel to aluminum/cast iron members. Comparison is made to research results which did not include the influence of the threads.
36 citations
TL;DR: In this paper, an improved acoustic model based on virtual material is proposed to provide an accurate measurement of interfacial contact stiffness using ultrasound, where the rough interface is assumed to be a thin layer of virtual material to incorporate the effect of ultrasound attenuation at the interface.
26 citations
TL;DR: In this article, a rail cyclically loaded during 20 years of traffic was examined by combination of several non-destructive techniques with high sensitivity to surface damage, namely positron annihilation spectroscopy, X-ray line profile analysis and magnetic Barkhausen noise.
15 citations
TL;DR: In this article, a semi-analytical model was proposed to evaluate the interfacial stiffness ratio of stationary contacts between rough surfaces, where the rough contact interface was described as a homogenized thin layer with effective moduli, which were employed to characterize the ratio of the tangential to normal contact stiffness.
9 citations
TL;DR: In this article, a new method for calculating the stiffness of bolted joints is presented, and the effect of joint surface stiffness on the overall stiffness is considered; the results show that the theoretical model presented in this paper is more practical.
Abstract: At present, few scholars have studied the effect of surface roughness on assembly stiffness. The influence of the joint surface stiffness on the overall stiffness is neglected. In this paper, a new method for calculating the stiffness of bolted joints is presented. The effect of joint surface stiffness on the overall stiffness is considered. Firstly, the relationship between load and displacement between cylinder and cylinder (including the joint surface with certain roughness) is studied, and the stiffness characteristic expression of the joint surface is obtained; the results are compared with the traditional stiffness calculation theory, and then, the influence of bolt connection surface on bolt connection is studied and compared with the stiffness calculation results of traditional bolt connection. The results show that the theoretical model presented in this paper is more practical.
7 citations