Under quasi-static crushing, the mean crushing forces for tubes of various lengths could be predicted by (6) P m = 4 π Rt σ u (2 t R) 0.7 (1.01-0.0179 L 2 R), whereas under a dynamic crushing condition, the mean crushing force of aluminum tubes could be evaluated by the following equation, which considers the variation of both tube length …
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The quasi-static crushing responses of CDAHs with different values of short inclined wall angle θ 1 are depicted in Fig. 16. For the L- and U-type CDAH specimens, θ 1 is increased from 20° to 40° with an interval of 5°; due to geometrical constraints (refer to Eq. (2)), θ 1 of F-type CDAH is from 22° to 38° with an interval of 4°.
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Question: Consider a large truck carrying a heavy load, such as steel beams. A significant hazard for the driver is that the load may slide forward, crushing the cab, if the truck stops suddenly in an accident or even in braking. Assume, for example, that a 14,000-kg load sits on the flatbed of a 20,000-kg truck moving at 11.0 m/s.
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CBT-N6 was tested under quasi-static experiments to validate the numerical model. The deformation process of the CBT-N6 under the quasi-static test is presented in Fig. 5 a (Detailed crushing process and multiperspective observations of CBT-N6 are shown in Video S1, Supplementary Materials). The CBT-N6 demonstrates a sequential …
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Numerical simulation of the quasi-static axial crushing of the new device shows that a smooth and high reaction force curve can be achieved in comparison with those of conventional square tubes ...
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Jackson A, Dutton S, Gunnion AJ, et al. Investigation into laminate design of open carbon-fibre/epoxy sections by quasi-static and dynamic crushing. Compos Struct 2011; 93: 2646–2654. Crossref. ISI. Google Scholar. 26. Farley GL. The effects of crushing speed on the energy-absorption capability of composite tubes.
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Quasi-static axial crushing tests were carried out on TPMS-T specimens fabricated in Section 2.2 using an MTS E45 machine with a 10 kN load cell based on the ASTM D695-15 standard. The specimen was placed between two flat platens, as shown in Fig. 6 (a), and the axial crushing test was performed at a loading rate of 20 mm/min …
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The quasi-static compression and dynamic crushing behaviors of VSHCS are investigated through simulation and theoretical analysis. To clarify the deformation mechanisms, the deformation modes, structure effect, stress-strain curves, and energy-absorption ability are comprehensively examined under different velocities. The VSHCS …
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The same cab is often utilized independent of what the rest of the truck application may be. However, the strengthen of the cabs has been found to be …
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Quasi-static axial crushing tests have been carried out on thin-walled top-hat and double-hat mild steel spot-welded sections. Several post-test collapse modes were identified for the structures ...
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Two full-scale quasi-static roof crush tests were performed on the exemplar cab structures at Exponent's Test and Engineering Center in Phoenix. Each test consisted of mounting the cab in a static test fixture and crushing the cab with a rigid steel platen. The cabs were instrumented to record reaction forces, deformations, and strains, and the
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The quasi-static crushing responses of SRHs, including deformation mechanism, crushing stress, specific energy absorption (SEA), and Poisson's ratio, are studied based on the finite-element (FE) method. The introduction of rhombic parts increases the number of plastic hinges, resulting in significantly higher crushing stress …
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Quasi-static tests are performed by crushing the composite tubes using an inwards crusher plug, an outwards crusher plug and crushing by only flat platens of the …
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In quasi-static loading, they discovered that auxetic re-entrant structures have a greater peak force and force-crushing efficiency than non-auxetic structures [6]. Even though there are studies ...
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Key words: collision post structure; subway cab cars; crashworthiness; quasi-static test. Cite this article as: XING Jie, XU Ping, ZHAO Hui, YAO Shu-guang, WANG Qian-xuan, …
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J2422_201002. This SAE Recommended Practice describes the test procedures for conducting quasi-static cab roof strength tests for heavy-truck applications. Its purpose is to establish recommended test procedures which will standardize the procedure for heavy trucks. Descriptions of the test set-up, test instrumentation, …
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Quasi-static crush response of lightweight sandwich composite tubes fabricated via newly designed internal thermal expansion technique - ScienceDirect. Composites Science and …
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quasi static crushing cab trucks coal russian . China Heavy Industry is an import-export joint-stock company that specializes in the production of large and medium-sized broken, sand-making and milling equipments, research, production, and sales.It is committed to providing customers with integrated solutions.More than 10 series and …
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Moreover, a parametric study is performed using finite element models under quasi-static loading. It is found that the cutting depth t, cutting depth w and cutting angle α have a distinct effect on the energy absorption (EA), mean crushing force (MCF) and peak crushing force (PCF) of the absorber.
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According to the literature [31], [32], it can be seen that when the strain rate effect of the material model is not considered in the finite element simulation, the speed grade of 2 m/s can also be considered as a quasi-static process. To simulate the quasi-static test of the cutting aluminium tube absorber, the degrees of freedom were fully ...
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that the partial crushing behavior of the honeycomb aluminum shows a. plastic hardening behavior. For the 6.35 mm (1/4 in.) cell size material, the stiffness changes from 61.66 to 6.92 MPa (Figure ...
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6 3.2. Quasi-static axial crushing results Figure 1 shows the chamfered jute/glass hybrid composite tube test specimens. The length of all the composite tube specimens was 100mm with one end ...
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The crushing velocity of V = 1 m/s is lower than the steady-shock velocity v s, so we assumed that this load can be regarded as quasi-static crushing load. Fig. 6 shows the FE simulated deformation patterns of the REC honeycomb with different geometrical parameters at different strain levels under the crushing velocity of V = 1 m/s …
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The focus of this research was to study the axial crushing behaviour of jute/glass hybrid composite tubes under quasi-static conditions and determine the possibility of their usage as energy ...
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In this present study, we proposed a novel 3D re-entrant circular auxetic metamaterial, and systematically investigated its crushing responses under uniaxial …
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Simulation results showed good agreement between experiment and simulation, the driver's cab absorbed 2321.13 kJ energy in the quasi-static crushing …
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The deformation by finite element simulation is in agreement with that by experiment, according to the results of simulation, the crashworthy driver's cab absorbs 2321.13 kJ energy in the quasi-static crushing load, and the percent of the first part, the second part and the third part is 17.86%, 81.28%, 0.86%, respectively, which also shows ...
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The maximum Specific Energy Absorption (SEA), minimum Initial Peak Crushing Force (IPCF) under quasi-static axial compression test at the rate of 10 mm/min, and thickness and height parameters of the thin-walled cylinder and length of the inner square's sides were considered the design variables to achieve the optimal state. In the …
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In the present research, the energy absorption and collapse behaviors of composite-coated corrugation-reinforced cylindrical absorbers were studied. The composite-coating of the cylindrical absorbers was done with carbon filaments using the filament winding method. Plots of force–displacement curves and fundamental indices of the …
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Consider a large truck carrying a heavy load, such as steel beams. A significant hazard for the driver is that the load may slide forward, crushing the cab, if the truck stops suddenly in an accident or even in braking. Assume, for example, that a 10 000-kg load sits on the flatbed of a 20 000-kg truck moving at 12.0 m/s.
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The results illustrate that the auxetic tubes showed a significant increase in SEA, CFE and EA parameters compared to non-auxetic conventional structures. …
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Abstract: In this study, a numerical and experimental investigation of the quasi-static crushing behavior of steel tubular structures was conducted. As the crushing failure …
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J2422_201002. This SAE Recommended Practice describes the test procedures for conducting quasi-static cab roof strength tests for heavy-truck applications. Its purpose is to establish recommended test procedures which will standardize the procedure for heavy trucks. Descriptions of the test set-up, test instrumentation, photographic/video ...
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DOI: 10.1016/JMATSCI.2013.01.026 Corpus ID: 135867830; Finite element modeling of the quasi-static axial crushing of braided composite tubes @article{Zhang2013FiniteEM, title={Finite element modeling of the quasi-static axial crushing of braided composite tubes}, author={Ping Zhang and Liangjin Gui and Zijie …
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7 Conclusions. In this paper, the quasi-static axial crushing behavior of a hexagonal energy absorption device named the origami crash box is studied through experiments, numerical simulation, as well as theoretical analysis. The proposed origami pattern is found to be able to trigger a diamond-shaped mode.
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