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Abstract

In world with limited amount of energy sources and with serious environmental pollution, interest in comparing the environmental embodied impacts of buildings using different structure systems and alternative building materials will be increased. This paper shows the significance of life cycle energy and carbon perspective and the material selection in reducing energy consumption and emissions production in the built environment. The study evaluates embodied environmental impacts of nearly zero energy residential structures. The environmental assessment uses framework of LCA within boundary: cradle to gate. Designed alternative scenarios of material compositions are also assessed in terms of energy effectiveness through selected thermal-physical parameters. This study uses multi-criteria decision analysis for making clearer selection between alternative scenarios. The results of MCDA show that alternative E from materials on nature plant base (wood, straw bales, massive wood panel) present possible way to sustainable perspective of nearly zero energy houses in Slovak republic

Abstract

Gears are torque and motion transmision elements required for gearboxes. Adequate consideration must be given to the material selection and heat treatment of these gears. Inappropriate material selection or heat treatment will lead to premature failure of the manufactured gears or early refurbishment. In our publication, we present a number of practical failures that can be traced back to wrong material selection or heat treatment operation.

Abstract

The article presents the problem of quality management in the process of material selection for structural elements of a car dump truck. The study took into account the classical management pyramid and there was used the optimization method (generalized objective function). The center that manages the process of production / assembly of the dump truck should be the level of organization that has the highest degree of processing of required information and making strategic decisions in this respect. The design process of structural elements is carried out primarily in terms of the ability to provide adequate physical and mechanical properties in the process. There is a very strong tendency to reduce the own weight of the semi-trailers by increasing the weight of the load. This is an important criterion from the point of view of the economics of operation of technical facilities of this type. The article presents the results of the application of a generalized objective function in the field of material selection for construction elements of a dump truck. The analysis includes structural elements made of S355 steel and Hardox 400 and 450 fine-grain steel.

Abstract

An application of a Finite Element Model updating is presented in this paper. Two Finite Element models were considered: a reinforced plate and a thin-walled beam. The two parts were numerically calculated in ANSYS Mechanical APDL and MATLAB programs. ANSYS performs Finite Element calculations, and a MATLAB programming code was used to control the optimization procedure. Geometric variables were chosen, to evaluate the value of the defined objective function. The material was picked using available selection charts, to find the most adequate one for the study. It has been concluded that the transveral displacement of the models modified by the optimization process decreased sharply in relation to the original state.

Abstract

The presented research deals with the development of comfortable male underwear taking into account the development of pattern block methods and the analysis of the relationships existing between the compression pressure, the knitted materials properties, and some push-up effects. The main aim of this study is to achieve the technical selection of the materials based on KES-FB evaluations.The ease value has been used as the main index to connect the structural design of underwear, on one hand, and the body sizes, on other hand. A “bodyshell” system for testing the soft tissue of male bodies by FlexiForce sensor has been implemented. The pressures under the shells at six different places on the male body with ease changing have been tested.The collected results including maximum-possible pressure and material tensile indexes measured thanks to KES-FB have been analyzed in order to find the most relevant indexes of the material properties. A mathematical equations based on relationships combining theoretical model with practical application have been established. These equations will be helpful for the consumers and designers to select “the suitable knitting materials for male underwear” and they can be used too in the perspective of parameterization in CAD, in order to improve product developments efficiency.

Outcomes in Water Resources Management”, 2015 . DOI: 10.1007/978-3-319-12586-2 [7] Cavallini, C., Giorgetti, A., Citti, P., Nicolaie, F. “Integral aided method for material selection based on quality function deployment and comprehensive VIKOR algorithm”, Materials & Design 47, pp. 27–34, 2013 . [8] Chatterjee, P., Chakraborty, S. “Material selection using preferential ranking methods”, Materials & Design 35, pp. 384–393, 2012 . [9] Chauhan, A., Vaish, R. “Magnetic material selection using multiple attribute decision-making approach”, Materials & Design 36, pp. 1 – 5

Abstract

Nowadays the joint replacement orthopaedic surgery is most frequently performed surgery associated with the damage of the join surface. The implantation is mainly placed in hip and knee area. This work includes the hip replacement design, based on the patient's medical records, the description of creation process and materials used for individual components.

., Dutta A. (2006). “Multiobjective optimization of hybrid laminates subjected to transverse impact.” Composite Structures. 73, 360-369. 16. Rakshit S., Ananthasuresh, G. K. (2008). “Simultaneous material selection and geometry design of statically determinate trusses using continuous optimization.” Structure and Multidisciplinary Optimization. 35, 55-68. 17. Sigmund O., Torquato A. S. (1999). “Design of smart composite materials using topology optimization.” Smart Material & Structures. 8, 365-379. 18. Sui Y. K., Yang D. Q. (1998). “A new method for structural

Abstract

Accelerated corrosion testing is indispensable for material selection, quality control and both initial and residual life time prediction for bare and painted metallic, polymeric, adhesive and other materials in atmospheric exposure conditions. The best known Neutral Salt Spray (NSS) test provides unrealistic conditions and poor correlation to exposures in atmosphere. Modern cyclic accelerated corrosion tests include intermittent salt spray, wet and dry phases and eventually other technical phases. They are able to predict the material performance in service more correctly as documented on several examples. The use of NSS should thus be restricted for quality control.

Abstract

In the current century, building protection is very important in the face of terrorist attacks. The old buildings in Europe are not sufficiently resilient to the loads produced by blasts. We still do not fully understand the effects of different explosives on buildings and human bodies. [1–3] Computing blast loads are different from that of traditional loads and the material selection rules for this type of impact load are diverse. Historical and old buildings cannot be protected simply by new walls and fences. New ways need to be found to improve a building’s resistance to the effects of a blast. It requires sufficiently thin yet strong retrofitted materials in order to reinforce a building’s walls [4–6].