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studying energy absorption in tapered thick walled tubes

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A novel self-locked energy absorbing system

Concertina folds usually occur in relatively thick-walled tubes and diamond folds are common in thin-walled tubes. Transition from concertina to diamond mode was also observed. structural design of the system by studying its energy absorption characteristics. The paper is structured as follows. Analysis and optimization of externally stiffened crush to control energy absorption charact eristics of thin-walled circular tubes under an axial compression. By machining wide circumferen-tial grooves from the outer surface of a thick-walled tube at specic intervals, they arrived at a general design concept for an integrally stiffened (monolithic) tube, as shown in Fig. 1. The thicker portions

Assessment and Design Enhancement of the Front End

In this paper, energy absorption in tapered thick walled tubes has been investigated. As a practical case, studies have been focused on the crush element of Siemens ER24PC locomotive. Comparative analysis of energy absorption behavior of Request PDF Comparative analysis of energy absorption behavior of tapered and grooved thin-walled tubes with the various geometry of the cross section In this paper, Crush force efficiency Energy Absorption Characteristics of Polyurethane Foam-filled enclosures are very common in structural crashworthiness to increase energy absorption. However, very less research has been targeted on potential use of natural/recycled material reinforced foam-filled tubes. Therefore, an experimental investigation was performed to quantify energy absorption capacity of polyurethane (PU) composite foam-filled circular steel tubes under quasi

IMPROVING OF ABSORPTION POWER OF TUBE

RAILCON 18 IMPROVING OF ABSORPTION POWER OF TUBE COLLISION ENERGY 10 absorber. Impact of high-density polyurethane foam on increasing of absorption power presented in papers. Low velocity impact of empty and foam filled circumferentially grooved thick-walled circular tubes are presented in the paper [8]. INFLUENCE OF IMPACT VELOCITY ON ENERGY analysed the axial compression behaviour and energy absorption of the thin-walled cylinder under impact load. Analysis outcomes showed that the impact kinetic energy is more sensitive to speed than impact mass. Gupta et al. [3] have performed an experimental study on aluminium conical frusta of different semi-apical angles under axial compression. Iman Ferestade - Blacksburg, Virginia Professional Study of Energy absorption of Crushing element in ER24PC Locomotive See publication. Studying energy absorption in tapered thick walled tubes Latin American Journal of Solids and Structures

Mushrooming of circular tubes under dynamic axial loading

In this paper, energy absorption in tapered thick walled tubes has been investigated. As a practical case, studies have been focused on the crush element of Siemens ER24PC locomotive. Railway ResearchModelling of the energy absorption system of IrSa locomotive is accomplished by using the ABAQUS engineering software platform. The dimensions of the buffer and the crash element are according to the data that are provided in Figures 6&7 [1]. The crash element is a tapered thick wall tube and the buffer is a circular tube Simulation Study on the Thin-walled Tube Structure of a D. Energy Absorption Property of Thin-walled Tube Structure versus Inducement Groove Vehicle crash energy absorption structure is often designed with inducement groove, which plays a part in perfect inducement of energy absorption, to make the structure have a better energy absorption property[6]. In the simulation study,

Study on Crashworthiness Characteristics of Several

Multi-layered thin-wall structures are more efficient and lighter than thick-wall structures, and show better crashworthiness characteristics. In this task, several concentric aluminum thin wall tubes as energy absorber under axial and oblique loading are studied and optimum combination of these tubes TUBULAR THIN-WALLED ENERGY ABSORBING and foam-filled circumferentially grooved thick-walled circular tubes under axial low velocity impact were investigated theoretically and experimentally by Darvizeh et al. [9]. In [10] the effect of discontinuity size on the energy absorption performance of square profiles was reported. In [16] the authors studied the Thick Walled Cylinders - University of Washingtonneeded wall thickness if the factor of safety n is 2.0 and the yield stress is 250 MPa. Use the maximum shear stress theory, i.e. maximum shear stress = yield strength/2n. ( wall = 61.8 mm thick ) 4. A 400 mm OD steel cylinder with a nominal ID of 240 mm is shrunk onto another steel cylinder of 240 mm OD and 140 mm ID. The radial interference is

Thin-Walled Structures - Journal - Elsevier

Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses.. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have Studying energy absorption in tapered thick walled tubesenergy-absorbing cells. In this paper, energy absorption in tapered thick walled tubes has been investigated. As a practical case, studies have been focused on the crush element of Siemens ER24PC locomotive. To investigate performance of this part at collision time, it

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