A ribbed strategy disrupts conventional metamaterial deformation ...
2.1. Geometry and fabrication. The ribbed concept is validated using BCC and FCC geometries as the based structural carriers. The corresponding ribbed truss-lattice structures denoted as BCCR and FCCR, were designed following the strategy presented in Figure 1 (D). The ribs are placed along the loading direction since the struts experience significant bending and …
Physiology, Nutrient Absorption
The gastrointestinal tract is a highly specialized organ system primarily responsible for nutrient absorption, though it has other roles. From the mouth to the anus, its length is approximately 9 meters (30 feet). The gastrointestinal tract''s wide range of functions include the following:[1][2][3][4]
New insights into energy conversion mechanism, optimal …
However, with respect to the abovementioned two core research ingredients, there are still several important issues needed to be addressed. Firstly, the universal upper bound ψ r e is of great theoretical significance but limited practical value, since ψ r e can be only achieved at the quasi-static limit implying a null entropy production, infinite cycle time, and …
New findings on energy absorption mechanisms | Balliol College
In a major publication in the journal Nature Materials, a study led by Professor Jin-Chong Tan (Professor of Engineering Science (Nanoscale Engineering), Fellow and Tutor in Engineering Science) has demonstrated a new energy absorption mechanism under high-speed mechanical impact.. Efficient absorption and dissipation of a sudden surge of mechanical …
The energy absorption system designed on the basis of nanofluidic behavior (also called nanofluidic energy absorption system, NEAS) will have a higher energy ab-sorption density than the conventional energy absorption materials, and can be repeatedly used. Thus it shows great advantages over the conventional energy absorption materials ...
Photocatalytic systems: reactions, mechanism, and …
2.2.1. Graphitic carbon nitride (g-CN). While research is still ongoing to determine the catalytic mechanism behind the photoinduced redox reactions, g-CN has emerged as a potential metal-free photocatalyst. 44 Graphitic carbon nitride (g …
Compressive Characteristics and Energy Absorption Capacity of ...
In order to meet the higher requirements of energy-absorbing structures in the lightweight automobile design, the mechanical design and impact energy absorption of porous TPMS structures are studied. Eight kinds of porous TPMS structure elements, Gyroid, Diamond, I-WP, Neovius, Primitive, Fischer-Koch S, F-RD, and PMY, are designed based on Matlab, and …
Energy-efficient biphasic solvents for industrial CO2 capture ...
Biphasic solvents have received attention for their use in CO 2 capture systems due to their ability to reduce the energy required for regeneration [8].Biphasic solvents are homogeneous before CO 2 absorption and turn into a liquid–liquid phase after absorption of a certain amount of CO 2 [9].One phase is enriched with more than 90% of the CO 2, and only …
Crashworthy design and energy absorption mechanisms for helicopter ...
The energy absorption system is composed of the helicopter landing gear, fuselage and other sub-systems, dissipating the impact kinetic energy in a step-by-step manner. In response to the present lack of overview papers on the crashworthy design of helicopters, this paper is specifically intended for the researchers in the field of aircraft ...
Study on Modern Energy Absorption Systems in Structures Subjected …
The structure had a rigid diaphragm, combined beam and block flooring (Leca + Polystyrene) system. The usage of this building was for educational purposes with a dead load of 6.5 KN/m 2, and a live load of 4.79 KN/m 2 according to the minimum uniformly distributed live loads in ASCE 07-10 Code.. The control structure considered in this study was a seven-story …
Design and Simulation of a Crash Energy Absorption System
Purpose The global car crash fatalities are mostly due to the frontal collisions. The head-on collision of a car leads to the dangerous intrusion of the bumper and other frontal parts of the vehicle towards the passenger compartment. The frontal structure needs to have a proper adaptable crash energy absorption system to reduce the intrusion. A new crash energy …
Origami-based bidirectional self-locking system for energy …
Thin-walled periodic self-locking structures have been widely studied in recent years from the point of view of energy absorption. Chen et al. (2016) presented a self-locking cell in the shape of a dumbbell consisting of two circular tubes joined by two platforms. Such thin-walled dumbbell-shaped tubes interlock tightly with each other under compressive or impact …
Lightweight cost-effective hybrid materials for energy absorption ...
The present paper experimentally explores the influence of the fiber hybridization and layering sequence on crashworthiness behavior and deformation history of polymer/metal thin-walled pipes.
Energy Absorption Performance of Open-Cell Aluminum Foam …
The outstanding mechanical properties and lightness of aluminum foam make it attractive as buffering and energy absorption material for spacecraft landing in deep space exploration. In this paper, cell-based model of open-cell aluminum foam has been established by Voronoi tessellation method. Through quantitative comparisons of energy absorption …
Energy balance and its components: implications for body weight ...
A fundamental principle of nutrition and metabolism is that body weight change is associated with an imbalance between the energy content of food eaten and energy expended by the body to …
Energy absorption of discretely assembled composite self-locked …
Recently, Chen et al. proposed a self-locked energy absorption system [19], in which tubes can interlock with each other after discretely assembling, and the initial force peak was attenuated effectively due to special topology design [20] (Supplementary Material S1). However, the material and space utilizations require further improvement, and the effect of …
(PDF) Absorption cooling systems – Review of various …
Absorption refrigeration technology was introduced to address some serious issues such as the energy crisis, increased fuel prices, and environmental problems associated with the conventional ...
Advancements in CO2 capture by absorption and adsorption: A ...
Climate change is a global isis that has gained ineasing attention and concern in recent years. The current state of our planet is characterized by rising global temperatures, melting polar ice caps, more frequent extreme weather events, and shifting climate patterns [1].The Intergovernmental Panel on Climate Change (IPCC) reported that global temperatures …
Improved Energy Absorption Mechanism: Expansion of Circular …
As firstly proposed method (MRVLB) for the advancement of the energy absorption system, the impacts of implementing vertical bars are investigated and the results are subsequently presented. Figure 2a shows a general parametric configuration of the case studies. In this study, the aim of investigating different case studies is suggesting a ...
Diffusion Absorption Refrigeration Systems: An Overview of …
The energy transition, originating in the limitation of fossil resources and greenhouse gas (GHG) emission reduction, is the basis of many studies on renewable energies in different industrial applications. The diffusion absorption refrigeration machines are very promising insofar as they allow the use of renewable resources (solar, geothermal, waste gas, etc.). This …
Interaction between Mechanical Wave and Nanoporous Energy Absorption System
The interaction between mechanical wave initiated by impact load and nanoporous energy absorption system (NEAS) is investigated using molecular dynamics (MD) simulations, which includes the forward procedure (stage I) and the reflected procedure (stage II) of mechanical wave. The current NEAS is made of one-end closed single-walled carbon …
The investigation of nanofluidic energy absorption system based …
Using both experimental and simulation methods, the energy absorption performance of Nanofluidic Energy Absorption System (NEAS) based on silica aerogel has been investigated. The energy absorption density of the aerogel NEAS is very high because of its high porosity and very low density, indicating its potential for developing light weight ...
Energy Absorption Mechanism
One promising option for using composite materials in tensile absorbers is to pull a bolt in a bearing mode continuously through a composite plate with local fracture in front of the bolt, which enables a relatively constant load level that is beneficial for efficient energy absorption and high SEA values (Fig. 10.1).A first description of this energy absorption concept goes back to Extra …
New insights into energy conversion mechanism, optimal …
Absorption carbon capture is currently the most commercialized technology and deemed as the vital solution to balance continued use of fossil fuels and carbon emission reduction. Nevertheless, its high energy cost remains …
Abscisic acid perception and signaling: structural mechanisms …
Adverse environmental conditions are a threat to agricultural yield and therefore exert a global effect on livelihood, health and the economy. Abscisic acid (ABA) is a vital plant …
Absorption cooling systems – Review of various techniques for …
As shown in Fig. 1, an absorption system consists of four main components, namely the generator, the condenser, the evaporator, and the absorber stead of using a compressor, the system uses an absorber to rise and carry the weak coolant through a pump when the heat is supplied to the generator.
Study of Temperature Effect on Cascade …
Nanofluidic energy absorption system (NEAS) with cascade energy absorption characteristics can absorb energy on different levels simultaneously in one system, which greatly enriches its functions and …
Physiology of Intestinal Absorption and Secretion
Peptide transport. Dipeptides and tripeptides are very efficiently absorbed in the small intestine. The process is indirectly Na +-dependent, in that Na + is necessary for the activity of Na + /H + exchanger 3 (NHE3) to generate a proton gradient for H + /peptide co-transport. Thus the two transport processes are functionally coupled.