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Online since: October 2006
Authors: Seong Min Kim, Michael J. McCarthy
Introduction Researchers have examined nondestructive internal defect detection techniques using electrical characteristics, light interaction, electromagnetic properties, sound, microwave, X-ray, and nuclear magnetic resonance (NMR) [1].
Avocados, mangos, and durians were used as samples for measuring internal quality factors nondestructively.
This demonstrates that the entire spectrum is influenced by mechanical/motional factors.
The benefit of using a ratio measurement to measure quality factors is that the ratio of the spectral peaks is affected much less than the individual spectral peak magnitudes.
If these three resonance peaks are related to the fruit maturity they can be used as quality factors for an in-line NMR sensors.
Online since: November 2017
Authors: Sangeeta Santra
Controlling the microstructure depends on how the interdiffusion zone develops, so the formation and subsequent growth of these zones is affected by both thermodynamic and kinetic factors.
Among the many factors affecting the interdiffusion behaviour in a system involving an ordered phase [39-41], the defect chemistry and the thermodynamic driving force play pivotal roles depending on the systems.
However, the properties get modified depending on the amount of alloying element.
Bever, Thermodynamic properties in: Intermetallic compounds, ed.
Nathal, Review of the Physical and Mechanical properties and potential applications of the B2 compound NiAl, NASA Technical Memorandum 105598, 1992
Online since: January 2015
Authors: Maria Odila Hilário Cioffi, Thatiane Brocks, Veronica Ambrogi
The toughness improvement was achieved without substantial impairment on thermomechanical properties.
This latter has strong influence on properties as impact, fatigue and damage tolerance among others [3].
The critical stress-intensity factor, KIC, was determined.
Results and Discussion Thermomechanical properties.
Sangermano, Comparative curing kinetics and thermal–mechanical properties of DGEBA thermosets cured with a hyperbranched poly(ethyleneimine) and an aliphatic triamine, Thermoch.
Online since: May 2015
Authors: Djamil Benghida
The intergovernmental concerns never took into consideration both the sustainability factor and the cultural one, not until the 1990s when research on climate change expanded and the sustainable development took an important place in the different academic cross fields: engineering, biology, technology and architecture.
Educate architects to this vernacular product, involving civil engineers to improve the mechanical properties of the adobe using natural materials and finally create and international research and training centers for the know-how.
Microstructure and transport properties of porous building materials.
II: Factors Affecting the Durability of Adobe Structures, Studies in Conservation, Maney Publishing. 24, No. 1 : 23-39. (1979)
I: The Properties of Adobe, Studies in Conservation, Maney Publishing. 23, No. 4: 139-146, (1978)
Online since: May 2005
Authors: M.C. Tsai, Y.A. Chen, C.F. Wu, Fuh Kuo Chen
Fig. 1 shows that increases in zinc changes the mechanical properties, e.g. strengthen and elongation, of brass[1].
Since 1990, micro-metal forming technology became more and more important [2,3].The main reason for the development of micro-metal forming is that it keeps the forming process costs down, increases production efficiency, and improves mechanical properties and material precision.
The effects of grain size, d/D or d/T to the true strain-stress curves after introducing factors such as grain refining and size-effects will be discussed.
Size-effect is one of the factors that affect micro-metal forming.
In contrast, C26000 displays inverse properties vs.
Online since: February 2019
Authors: I.L. Shubin, V.V. Dorkin, P.S. Sultygova
Durability provides the ability of the structure to maintain its load-bearing capacity for a certain period of time with simultaneous loading, chemical factors and temperature [7].
Usually, concrete and steel reinforcement largely loses their strength properties when exposed to temperatures above 200-300° C [17].
(4) We rewrite (4) taking into account: , (5) where - function, depending on the ratio of the deformation properties of the material under short-term and long-term load action (material state function).
In order to determine the degree of influence of the external compressive load on the properties of cooled concrete, the prisms were heated and cooled under the action of a load of from the destructive load or in its absence.
As the preheating temperature of the concrete increases, its integrity is violated, cracks appear in its structure, its porosity increases, which is the main factor determining the change in the physical and mechanical characteristics of heavy concrete after the temperature effect.
Online since: January 2022
Authors: Juan Carlos Suárez, Nadia Muñoz, Patrick Roger Townsend Valencia, Alvaro Rodríguez-Ortìz
This behavior causes the GFRP materials used in the construction of planing hull vessels to degrade in their mechanical properties in a shorter period of time than normal.
The damage shown in Fig. 2 was not merely a surface crack in the gel coat, but the damaged area penetrated in the thickness direction, affecting several layers of the laminate.
It is important to note that the way in which the warp and weft threads were intertwined gave the fabric a very curly surface, and this distortion in the threads produced a decrease in their mechanical properties.
The mechanical properties of the materials are shown in Table 3, which also describes the sequence of layers (from layer 1 outside the hull to layer 10 in the inside of the ship), the weight of resin (nominal) for every layer, and the estimated resin volume.
[13] Jeshti, D.K., Nayak, R.K., 2019, Improvement of mechanical properties of hybrid composites through interplay reaarangement of glass and carbon woven fabrics for marine applications, Composites Part B: Engineering, Vol. 168, pp. 467-475
Online since: May 2020
Authors: Terence Tumolva, Roela Feliz M. Bautista, Marin Rosette H. Tam, Kevin Adrian D. Wong
Agar was added as a stabilizer based on the physical properties of the formed product.
Also, its antimicrobial and cytotoxic properties were evaluated.
However, the dressings are often semi-permeable to gases and have poor mechanical properties, which leave the wound susceptible to further damage [3].
Prior to commercialization, further tests on the bandage properties are strongly recommended.
Biological factors such as hemostatic ability, wound healing properties, and skin sensitivity should also be taken into consideration.
Online since: October 2014
Authors: Piotr Michalski, Mariusz Piotr Hetmańczyk
Considering the most popular industrial sensor systems, with respect to the following criteria measuring range, resolution, sensitivity, also an important factor in the selection [2] of the actuators and control subsystem has been discussed.
Industrial productive systems run at a risk of an impact of many external factors.
In addition, the use of a universal vision system will allow to: · developing a universal housing adapted to most items, · elaborating one model that can be developed in the form of the standard [10] with variable structural properties depending on varying applications (overall dimensions), · increasing the versatility of elaborated machine, · reducing the time needed to prepare the testing of a new item, · reducing the number of sensors used to detect the presence of the object, · simplification of the control subsystem (possible resignation from Programmable Logic Controllers or programmable relays), · acquisition of measurement data (in form of photographic documentation), · the ability to connect to arbitrary industrial network, · reducing the impact of external interference from magnetic fields, stray currents, etc.
An elaboration of devices that fulfils all the specified requirements with enumerated factors will be the most important task for engineers derived from different domains.
The conceptual solution, due to the mechanical structure of the device is characterized by a low degree of versatility.
Online since: December 2014
Authors: Jozef Maščeník, Slavko Pavlenko, Luba Bicejova
It is used there where chipless, chip or thermal manufacturing techniques provide, due to mechanical or physical reasons, unsatisfactory results, or where the mentioned techniques totally fail.
Mechanical reactions occur in a microarea.
As mentioned above, technology head as well as kind of abrasive granularity affect generation of vibration acceleration amplitude at frequency ranges from 2,000 Hz to 4,000 Hz.
Pasko: Influence of technological factors of die casting on mechanical properties of castings from silumin, 2013.
Showing 15861 to 15870 of 25946 items