Study on improvement of prefolded energy absorption device to constant resistance and its mechanical properties

Abstract

When the rock burst occurs, energy absorption support is an important method to solve the impact failure. To achieve constant resistance performance of energy absorption device, as an important component of the support, the mechanical properties of one kind of prefolded tube is analyzed by quasi-static compression test. The deformation process of compression test is simulated by ABAQUS and plastic strain nephogram of the numerical model are studied. It is found that the main factors affecting the fluctuation of force-displacement curve is the stiffness of concave side wall. The original tube is improved to constant resistance by changing the side wall. The friction coefficient affects the folding order and form of the energy absorbing device. Lifting the concave side wall stiffness can improve the overall stiffness of energy absorption device and slow down the falling section of force-displacement curve. It is always squeezed by adjacent convex side wall in the process of folding, with large plastic deformation. Compared with the original one, the improved prefolded tube designed in this paper can keep the maximum bearing capacity ( Pmax), increase the total energy absorption ( E), improve the specific energy absorption (SEA), and decrease the variance ( S2) of force-displacement curve.

The failure behavior of coal-rock combined body under compression-shear loading

“…Nevertheless, this shift to deep mining is not without its challenges, as it entails facing various hazards, including rock bursts, coal and gas outbursts, roof collapse, and water inrush incidents. [6][7][8][9] Among these, the occurrence of rock bursts is becoming more frequent and intense, posing a significant hindrance to the sustainable development of the coal industry. [10][11][12][13] Therefore, addressing and managing these challenges effectively becomes imperative for ensuring the long-term viability of the coal economy.…”

Experimental study of energy‑absorbing and support characteristics of glass microsphere-filled steel tube columns under uniaxial compression

“…Showcasing exceptional subsequent support performance in the later stages of loading, the particles could demonstrate an increase in strength as they fracture further. This has great potential in areas that require both energy absorption and certain support capabilities, such as yielding energy-absorbing support structures in coal mines 10 , 14 , damping structure for soft rock support 15 , 16 , and underground protective engineering projects 11 , 17 .…”

Study of the factors influencing load displacement curve of energy absorbing device by area division simulation

“…In the field of traffic, such as vehicle crash prevention, support role in the process of aircraft cargo hold crash, and crash prevention role in modern rail vehicle collision 17 – 21 . The energy absorbing devices appear as a progressive fold in axial compression, and the plastic deformation of the fold can absorb a large amount of energy 22 . In recent years, many experts and scholars have optimized the design of the energy-absorbing capacity of the energy absorbing devices, Wang et al 23 improves the energy absorption capacity by optimizing the cross-sectional geometry of the energy absorption device.…”