Bending characteristics of top-hat structures through tailor rolled blank (TRB) process

Zhang, Huile; Sun, Guangyong; Xiao, Zhihua; Li, Guangyao; Li, Qing

doi:10.1016/j.tws.2017.10.032

Cited by 67 publications

(18 citation statements)

References 43 publications

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“…The processes of seam welding, extrusion, rolling and brazing affect both the microstructure and the mechanical performance [7,15]. In comparison, the influencing factors on the properties of folded MPFTs were rarely investigated [16,17]. The current work provides valuable information on the design of folded MPFTs.…”

Section: Discussionmentioning

confidence: 99%

Study on the Pressure Bearing Capability of Folded Multi-Port Flat Tube

Ding

Chen²,

Zhao

et al. 2019

Materials

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The pressure bearing capability of a folded multi-port flat tube (MPFT), which has the advantage of retaining the corrosion property of corrosion resistant materials, was investigated in this study with both a burst pressure test and finite element simulation. Results show that the folded tube’s failure is mainly caused by the breaking of the inner ribs. Instead of detecting inner pressure, the bulging ratio, which is supposed to be small under service pressure, rises rapidly before failure. Therefore, it is suggested to use bulging ratio to visibly determine the working status of folded MPFTs. Based on FE simulations, the pressure bearing capability of the folded MPFT was improved by optimizing the relevant folding parameters. In addition, the influence of in-plane bending was also investigated. It is found that the folded MPFTs can still retain most of the pressure bearing capability after in-plane bending.

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Section: Discussionmentioning

confidence: 99%

Study on the Pressure Bearing Capability of Folded Multi-Port Flat Tube

Ding

Chen²,

Zhao

et al. 2019

Materials

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“…(4) Besides the residual crashworthiness of CFRP structures with pre-impact damage under axial crushing, the residual performance of CFRP structures with pre-impact damage under oblique [34][35][36][37] and transverse loading [38,39] also should be comprehensively investigated in the future.…”

Section: Discussionmentioning

confidence: 99%

Residual crashworthiness of CFRP structures with pre-impact damage – An experimental and numerical study

Chen

Sun

Meng

et al. 2018

International Journal of Mechanical Sciences

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This study investigated the effect of transverse pre-impact damage on the load bearing capacity and failure behavior of square carbon fiber reinforced plastic (CFRP) tubes for axial crushing. The CFRP tubes were impacted transversely in different levels of impact energies to generate initial damage, and then the specimens were further crushed axially to evaluate the relation between transverse impact energies/positions and the residual axial crashworthiness. A finite element (FE) model was also developed to simulate the complex damage behavior of the CFRP tubes under these two different loading processes, based upon the continuum damage model (CDM) with user-defined material subroutine in Abaqus. A combined failure mode was observed in the transverse pre-impact tests, in which delamination was combined with partial or complete fiber breakage when increasing the impact energy from 10 J to 30 J.

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“…37 and Zhang et al. 38 studied the bending characteristics of graded top-hat structures. And a uniform analytical model for mean crushing forces and energy absorption for variable thickness single/multi-cell structures was derived by Sun et al.…”

Section: Introductionmentioning

confidence: 99%

“…And an optimization design was further performed to achieve the matching between mechanical properties and safety performance of tubular structures. Sun et al 37 and Zhang et al 38 studied the bending characteristics of graded top-hat structures. And a uniform analytical model for mean crushing forces and energy absorption for variable thickness single/multicell structures was derived by Sun et al 39 and Zheng et al 40 The results showed that the theoretical solutions agreed well with the experimental and numerical results.…”

Section: Introductionmentioning

confidence: 99%

Dynamic crashing behavior of thin-walled conical tubular structures with nonlinearly-graded diameters

Suo

2018

Proceedings of the Institution of Mechanical Engineers, Part C:

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Thin-walled structures with graded property have been paid more attention in recent years due to their significant balance between lightweight and crashworthiness. However, few studies have been focused on energy absorption capacity of thin-walled conical tubes with graded diameters. In this paper, the thin-walled conical aluminum tubes with nonlinearly-graded diameters are introduced and their corresponding crashing characteristics are performed. The diameters are assumed to nonlinearly vary according to a power-law distribution function primarily determined by a graded exponent n. It is found that the total weight of thin-walled conical tubes decreases with the increasing of the gradient exponent. The energy-absorbed performances such as specific energy absorption, initial peak crashing force, and mean crashing force of those graded tubular structures are numerically analyzed. And then the effects of various geometric parameters such as the gradient exponent, deformation distance, and diameter range on crashing behaviors are further evaluated. It is observed that those parameters especially the gradient exponent has significantly obvious effects on crashworthiness of the proposed nonlinearly graded tubes. It is also noted that the straight conical structure with gradient n = 1.0 may not show the best energy absorption characteristics compared with other gradients. The work could provide valuable information for effective design of thin-walled energy-absorbing structures with variable geometrical parameters.

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Bending characteristics of top-hat structures through tailor rolled blank (TRB) process

Cited by 67 publications

References 43 publications

Study on the Pressure Bearing Capability of Folded Multi-Port Flat Tube

Study on the Pressure Bearing Capability of Folded Multi-Port Flat Tube

Residual crashworthiness of CFRP structures with pre-impact damage – An experimental and numerical study

Dynamic crashing behavior of thin-walled conical tubular structures with nonlinearly-graded diameters

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