CHAPTER 12. Adaptive Magnetorheological Energy Absorbing Mounts for Shock Mitigation

Analytical models of static and dynamic impact elastoplastic deformation of tubular energy-absorbing elements constituting a tubular plastic shock absorber are proposed. The developed models can be used for the calculation and design of these shock absorbers. Keywords static and dynamic elastoplastic deformation, mathematical modeling, tubular energy-absorbing element, tubular plastic shock absorber, impact loading. [email protected]

Download Full-text

New Solutions for Energy Absorbing Materials

10.21236/ada582743 ◽

2012 ◽

Author(s):

Michael R. Haberman ◽

Carolyn C. Seepersad ◽

Preston S. Wilson ◽

Kim Alderson ◽

Andrew Alderson ◽

...

Keyword(s):

Absorbing Materials ◽

Energy Absorbing

Download Full-text

Bioinspired energy absorbing material designs using additive manufacturing

Journal of the Mechanical Behavior of Biomedical Materials ◽

10.1016/j.jmbbm.2021.104518 ◽

2021 ◽

Vol 119 ◽

pp. 104518

Author(s):

Aniket Ingrole ◽

Trevor G. Aguirre ◽

Luca Fuller ◽

Seth W. Donahue

Keyword(s):

Additive Manufacturing ◽

Absorbing Material ◽

Energy Absorbing

Download Full-text

Investigation of Energy-Absorbing Properties of a Bio-Inspired Structure

Metals ◽

10.3390/met11060881 ◽

2021 ◽

Vol 11 (6) ◽

pp. 881

Author(s):

Adrian Dubicki ◽

Izabela Zglobicka ◽

Krzysztof J. Kurzydłowski

Keyword(s):

Absorption Capacity ◽

Compression Tests ◽

Element Analysis ◽

Lightweight Structures ◽

New Energy ◽

Absorbing Material ◽

Lightweight Structure ◽

3D Printed ◽

Deformation Force ◽

Energy Absorbing

Numerous engineering applications require lightweight structures with excellent absorption capacity. The problem of obtaining such structures may be solved by nature and especially biological structures with such properties. The paper concerns an attempt to develop a new energy-absorbing material using a biomimetic approach. The lightweight structure investigated here is mimicking geometry of diatom shells, which are known to be optimized by nature in terms of the resistance to mechanical loading. The structures mimicking frustule of diatoms, retaining the similarity with the natural shell, were 3D printed and subjected to compression tests. As required, the bio-inspired structure deformed continuously with the increase in deformation force. Finite element analysis (FEA) was carried out to gain insight into the mechanism of damage of the samples mimicking diatoms shells. The experimental results showed a good agreement with the numerical results. The results are discussed in the context of further investigations which need to be conducted as well as possible applications in the energy absorbing structures.

Download Full-text

A Shock Mitigation of Pedestrian-Vehicle Impact Using Active Hood Lift System: Deploying Time Investigation

Shock and Vibration ◽

10.1155/2016/7589598 ◽

2016 ◽

Vol 2016 ◽

pp. 1-17 ◽

Cited By ~ 3

Author(s):

Tae-Hoon Lee ◽

Gun-Ha Yoon ◽

Seung-Bok Choi

Keyword(s):

Response Time ◽

Design Parameters ◽

Passenger Vehicle ◽

Governing Equations ◽

Total Response Time ◽

Shock Mitigation ◽

Vehicle Impact ◽

Driving Speed ◽

Working Principle ◽

Principal Design

This paper investigates the deploying time (or response time) of an active hood lift system (AHLS) of a passenger vehicle activated by gunpowder actuator. In this work, this is accomplished by changing principal design parameters of the latch part mechanism of the hood system. After briefly introducing the working principle of the AHLS operated by the gunpowder actuator, the governing equations of the AHLS are formulated for each different deploying motion. Subsequently, using the governing equations, the response time for deploying the hold lift system is determined by changing several geometric distances such as the distance from the rotational center of the pop-up guide to the point of the latch in the axial and vertical directions. Then, a comparison is made of the total response time to completely deploy the hood lift system with the existing conventional AHLS and proposed AHLS. In addition, the workable driving speed of the proposed AHLS is compared with the conventional one by changing the powder volume of the actuator.

Download Full-text