For the quasi-static crushing of circular tubes, Alexander [3] constructed a theoretical model and concluded that the mean crushing force of a circular tube can be evaluated as (1) P m = 2 ( π t) 3 / 2 R 1 / 2 σ 0 3 - ( 1 / 4), where t and R are the thickness and radius of the tube and σ0 is the yield strength of the material.

For this purpose, axial crushing and three-point bending tests on double-hat and top-hat crash boxes were performed, respectively. Three levels of adhesion quality are investigated: none, weak ...

Under the idealized conditions of quasi‐static vertical loading, the structural members of the cab are aligned with the axis of the load making it possible to generate extremely …

This paper examines the effect of segmentation on the crushing behaviour, energy absorption and failure mechanism of composite tubes. Quasi-static axial crushing behaviour of segmented and non-segmented composite tubes is investigated experimentally. The segmented composite tube consists of three different material …

The quasi-static compression experiment showed that the driver's cab produced stable and ordered plastic deformation. Finite element simulation by LS-DYNA was used to simulate the deformation of the structure under quasi-static compression.

quasi static crushing cab trucks coal russian. Fountain Essays - Just another WordPress site - coal crusher hammer supplyers - lagunakrynicamorska.pl. Concrete Research Library, 2008 Edition. This is an updated searchable compendium of over 1,200 PCA concrete research reports from 1916 to 2008. Topics range from concrete properties and long ...

All of the designed specimens were fabricated by laser rotary cutting machine on steel tubes, and the crushing tests were performed by a universal testing machine and drop weight machine for quasi-static and impact loading rates, respectively.

The proposed rule allows for either static load conditions and a quasi-static test, or a dynamic test to asses the performance of an end frame. A quasi-static collision post test …

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.

The mechanical behavior of aluminum honeycombs subjected to quasi-static combined compression-shear loading was experimentally investigated. Two different deformation patterns were observed, deforming cell walls non-inclined (Mode I) and inclined (Mode II) respectively. For the first time, normal and shear forces of honeycombs deforming in …

The focus of this research was to study the axial crushing behaviour of jute/glass hybrid composite tubes under quasi-static axial crushing and determine the possibility of their usage as energy ...

The aims of this study are to obtain experimental data on the crushing of stiffened square tubes, and to develop a simple analytical expression for predicting the mean crushing strength of stiffened plates making up a plated structure. A series of axial crushing tests in a quasistatic condition was carried out on thin-walled square tubes …

Based on the code LS-DYNA, the simulation strategy on the quasi-static crushing process of composite tubes is studied by conducting two series of comparison simulations: one is at different virtual loading speeds with the real material density and the other is with different virtual material densities at the given loading speed. The …

This SAE Recommended Practice describes the test procedures for conducting quasi-static cab roof strength tests for heavy-truck applications. Its …

The innovative design of microstructure topology is of great significance to improve the energy absorption performance of honeycombs. In this paper, by embedding a hexagonal substructure in each inclined wall of the traditional re-entrant (RE) honeycomb, a novel auxetic honeycomb, called re-entrant combined-wall (RCW) honeycomb, is …

Semantic Scholar extracted view of "On crushing behavior of square aluminum/CFRP hybrid structures subjected to quasi-static loading" by Guohua Zhu et al.

The performance of each core is assessed under quasi-static loading with experimental and numerical analyses. The non-optimised diamond strip cube strip core offered a 41% increase in average force compared to the best-performing curved-crease Miura-type foldcore previously reported and a 92% improvement over the standard Miura-type …

Physics questions and answers. 5. 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. I Truck load mass is 12,000 kg and sits on the flatbed of a 22,000 kg Truck moving at 12.0 m/s.

Request PDF | On Feb 1, 2018, Weiyuan Guan and others published Crushing analysis and multi-objective optimization of a cutting aluminium tube absorber for railway vehicles under quasi-static ...

In this paper, dynamic and quasi-static crush testing of carbon-fibre/epoxy specimens representative of elements in an energy-absorbing subfloor structure is reported. The elements were assembled using different joining methods, and the crush performance and fracture behaviour of the various designs are compared.

In this paper, the damage behaviour and the energy-absorbing results of composite sinusoidal specimens have been studied by quasi-static crushing experiments. The failure mechanisms of specimens under quasi-static crushing is further analysed. A numerical simulation has been performed by using the finite element model code LS …

The axial crushing of the single wall corrugated paperboard is explored experimentally and analytically. Quasi-static compression experiment is conducted of the single wall corrugated paperboard, and a typical folding element is suggested based on the selection principle of the unit, including two corner elements and two panels.

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.

In this section, the ST, TPMS lattices, and TPMS-filled tubes were respectively tested to validate the accuracy of FE models under quasi-static axial crushing. Then a parametric study was carried out to investigate the effect of ρ, gradient, unit cell height, and hybrid design on crushing responses and energy absorption …

Crashworthiness design and experimental validation of a novel collision post structure for subway cab cars. Abstract: This paper proposes a novel collision post structure designed to improve the crashworthiness of subway cab cars. The structure provides two innovative features: 1) a simpler connection between the post and the car roof, which ...

Semantic Scholar extracted view of "Quasi-static and dynamic crushing behaviors of aluminum and steel tubes with a cutout" by Haipeng Han et al.

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, a 10 000-kg load sits on the flatbed of a 20 000-kg truck moving at 12.0 m/s.

Semantic Scholar extracted view of "Energy absorption characteristics of TPMS-filled square tubes under quasi-static axial crushing" by Mincen Wan et al.

The dynamic and quasi-static crush performance and fracture behaviour of the compound elements are compared, and multiple specimen manufacturing methods are evaluated. …

The in-plane quasi-static crushing response of the REC honeycomb with large deformation was investigated theoretically and numerically. The numerical modeling methods in LS-DYNA software were validated by using the quasi-static crush test data of 3D-printed REC honeycomb specimens.