scholarly journals Dynamic parameters of multi-cabin protective structure subjected to low-impact load – Numerical and experimental investigations

2020 ◽  
Vol 16 (5) ◽  
pp. 988-1000
Author(s):  
Jing-xin Ma ◽  
Ru-wen Wang ◽  
Sheng-zhuo Lu ◽  
Wei-dong Chen
Keyword(s):  
Impact Load ◽  
Experimental Investigations ◽  
Dynamic Parameters ◽  
Protective Structure

scholarly journals IMPROVEMENT OF MACHINE SAFETY DEVICES

2018 ◽  
Vol 58 (1) ◽  
pp. 17 ◽  
Author(s):  
Bohdan Matviiovych Hevko ◽  
Roman Bohdanovych Hevko ◽  
Oleksandra Mykolaivna Klendii ◽  
Mykola Vasyliovych Buriak ◽  
Yurii Volodymyrovych Dzyadykevych ◽  
...  
Keyword(s):  
Optimum Design ◽  
Test Bench ◽  
Theoretical Calculations ◽  
Experimental Investigations ◽  
Dynamic Parameters ◽  
Safety Devices ◽  
Basic Parameters ◽  
Machine Safety ◽  
Made In ◽  
New Machine

The article presents a development of new machine safety devices, which provide protection of operating elements from overload. Theoretical calculations have been made in order to determine the optimum design, kinematic and dynamic parameters of safety devices. A test bench has been developed and experimental investigations have been conducted in order to determine basic parameters of overload clutches.

Experimental Investigation of Dynamic Parameters of Viscous Fluids in Unsteady Flow

1988 ◽  
Vol 110 (1) ◽  
pp. 29-35 ◽  
Author(s):  
R. A. Ibrahim ◽  
G. Latorre
Keyword(s):  
Stokes Equations ◽  
Viscous Fluids ◽  
Navier Stokes ◽  
Experimental Investigations ◽  
Dynamic Parameters ◽  
Cylindrical Container ◽  
Liquid Propellant ◽  
Navier Stokes Equations ◽  
Mass Moment ◽  
Mass Moment Of Inertia

The main objective of this paper is to conduct a series of experimental investigations to measure the effective mass moment of inertia and damping coefficient of a viscous fluid due to an immersed rod fitted in a circular cylindrical container which experiences roll oscillations. This work is mainly oriented to the dynamic analysis of liquid propellant rockets. The measured results are used to examine the validity of the solution of the linearized Navier-Stokes equations. It is shown that the liquid inertia and damping are dependent upon the tank roll frequency and fairly agree with the predicted analytical results.

Mechanical Behaviors of the Stiffeners in Protective Structure Under Impact Load

2012 ◽  
Vol 5 (2) ◽  
pp. 741-744
Author(s):  
Zhongguo Zhang ◽  
Zhaohui Liu ◽  
Bin Gao
Keyword(s):  
Impact Load ◽  
Protective Structure ◽  
Mechanical Behaviors

Energy-Absorbing Cab Support of Forest Machine

2015 ◽  
Vol 791 ◽  
pp. 290-296
Author(s):  
Aleksandr Vasilyevich Pitukhin ◽  
Vadim Kostyukevich ◽  
Igor Skobtsov
Keyword(s):  
Plastic Deformation ◽  
Energy Absorption ◽  
Experimental Studies ◽  
Geometric Parameters ◽  
Experimental Investigations ◽  
Protective Structure ◽  
Energy Absorbing

One of the requirements to the cabin of a forestry machine is the ability to absorb a certain amount of energy during deformation in the event of a rollover. The paper presents a method for increasing energy absorption of protective structure of a forestry machine cabin, enabling to reduce the risk of injuries to the operators in the event of an emergency. This is achieved by introducing into the structure of the protective frame of a cab energy-absorbing mounts in which the energy is absorbed due to plastic deformation of their elements in the event of a rollover of forestry machine. The article presents the design of the mount, describes the principle of its operation in the event of an emergency, and theoretical and experimental studies of the deformable mount. As the result of theoretical and experimental investigations the geometric parameters of the energy-absorbing mount are determined.

Numerical and experimental investigations on sandwich panels made with eco-friendly components under low-velocity impact

2021 ◽  
pp. 109963622110204
Author(s):  
Pablo Oliveira ◽  
Sebastian Kilchert ◽  
Michael May ◽  
Tulio Panzera ◽  
Fabrizio Scarpa ◽  
...  
Keyword(s):  
Energy Absorption ◽  
Lower Energy ◽  
Shear Failure ◽  
Epoxy Polymer ◽  
Impact Load ◽  
Low Velocity Impact ◽  
Experimental Investigations ◽  
Low Velocity ◽  
Velocity Impact ◽  
The Impact

A low-velocity impact characterisation of a sustainable sandwich panel based on upcycled bottle caps as circular honeycomb is conducted. The recycled core aims to develop an alternative route of reusing waste bottle caps disposed in landfills. Ecological alternatives to skin (recycled PET foil) and adhesive (bio-polyurethane) are also compared with classic components (aluminium skin and epoxy polymer). A low-cost reinforcement (cement particles) is also proposed to enhance the mechanical strength of the panel. The samples are tested at several levels of impact energy, according to the type of skin, to observe their effect on mechanical behaviour. Metal skins achieve higher impact loads and energy absorption compared to PET foil. The bio-adhesive leads to a similar or enhanced maximum impact load and energy absorption compared to the epoxy adhesive. Specific properties highlight the promising performance of the bio-based adhesive with aluminium skins, reaching increments of up to 378%. The cement increases the maximum load and reduces the duration of the impact event, leading to lower energy absorption. The unreinforced epoxy polymer shows a visible adhesive peeling off from aluminium skin, while particle inclusions lead to reduced overall delamination. Biopolymer exhibits marginal adhesive debonding and stable deformation, revealing a progressive failure. In general, PET samples show core shear failure due to rupture of the skin. Crack propagation in PET samples made with biopolymer adhesive is reduced at lower energy levels. The results evidence the promising application of bottle caps in a more sustainable honeycomb core to build eco-friendly structures.

EXPERIMENTAL INVESTIGATIONS OF DOUBLE MULTI-LEAF SPRING SUBJECTED TO IMPACT LOAD

2015 ◽  
Vol 19 (2) ◽  
pp. 45-51 ◽  
Author(s):  
Paweł Bogusz ◽  
Wiesław Krasoń ◽  
Józef Wysocki
Keyword(s):  
Impact Load ◽  
Leaf Spring ◽  
Experimental Investigations

scholarly journals Modeling of air flow in industrial rooms

2018 ◽  
Vol 13 (1) ◽  
pp. 21-28
Author(s):  
Yuriy Yurkevych ◽  
Iryna Sukholova ◽  
Mariana Kasynets
Keyword(s):  
Air Flow ◽  
Air Distribution ◽  
Experimental Investigations ◽  
Human Organism ◽  
Dynamic Parameters ◽  
Ansys Fluent ◽  
Air Jets ◽  
Air Supply ◽  
The Mathematical Model ◽  
Variable Regime

Abstract The article is devoted to the air distribution in a room by swirl and laying air jets. Dynamic parameters of air flow that is created due to swirl and laying air jets at their leakage in a room has been determined. The mathematical model of air supply with swirl and laying air jets in the industrial rooms is improved. Simulation of air flow is performed due to CFD FLUENT (Ansys FLUENT). Solution of the equation by using k-ε model of turbulence is presented. Dynamic parameters of air flow that is created due to swirl and laying air jets at their leakage at variable regime and creation of dynamic microclimate in a room has been determined. Results of experimental investigations of air supply into the room by air distribution device which creates swirl air jets for creation more intensive turbulence air flow in the room are presented. The results of theoretical researches of influence of dynamic microclimate to the human organism are presented.

scholarly journals Comparison of Energy Absorption in Circular Aluminium Crash Boxes with Rigid and Elastic Boundary Conditions: Numerical and Experimental Investigations

2019 ◽  
Vol 16 (1) ◽  
pp. 6200-6213
Author(s):  
A. Keshavarzi ◽  
J. Marzbanrad ◽  
F. Haji Aboutalebi
Keyword(s):  
Boundary Conditions ◽  
Energy Absorption ◽  
Impact Load ◽  
Deformation Mode ◽  
Maximum Energy ◽  
Elastic Support ◽  
Experimental Investigations ◽  
Elastic Boundary ◽  
Crash Behaviour ◽  
Elastic Boundary Conditions

Crash boxes are usually used in the transportation and automobile industries. Important parameters such as material, boundary conditions, geometry, impact energy consists of striker mass and velocity, and plastic deformation history can influence on the maximum energy absorption and impact load of these structures. In this research first, crash behaviour of extruded aluminium circular tubes under axial impact loading with rigid and elastic boundary conditions are studied. Then, effect of the elastic support on the tube energy absorption is numerically and experimentally investigated. In the following, the numerical results are compared with the practical observations and validated. Finally, it is revealed that employing the elastic support leads to changing deformation mode and significantly reduces the maximum impact load.

Sign in / Sign up

Export Citation Format

Share Document