scholarly journals Composite material selection for aircraft structures based on experimental and numerical evaluation of mechanical properties

2021 ◽  
Vol 31 ◽  
pp. 127-133
Author(s):  
G. Kastratović ◽  
A. Grbović ◽  
A. Sedmak ◽  
Ž. Božić ◽  
S. Sedmak
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Numerical Evaluation ◽  
Material Selection ◽  
Aircraft Structures ◽  
Selection For

Composite material selection for structural applications based on AHP-MOORA approach

2020 ◽  
Vol 33 ◽  
pp. 5659-5663 ◽  
Author(s):  
Prabina Kumar Patnaik ◽  
Priyadarshi Tapas Ranjan Swain ◽  
Srimant Kumar Mishra ◽  
Abhilash Purohit ◽  
Sandhyarani Biswas
Keyword(s):  
Composite Material ◽  
Material Selection ◽  
Structural Applications ◽  
Selection For

Material Selection for Prototype Design and Production

2020 ◽  
Vol 994 ◽  
pp. 304-311
Author(s):  
Michal Šašala ◽  
Lukáš Hrivniak ◽  
Jozef Svetlík
Keyword(s):  
Mechanical Properties ◽  
Design Process ◽  
Manufacturing Process ◽  
Mechanical Design ◽  
Material Selection ◽  
Selection Process ◽  
High Stress ◽  
Manufacturing Cost ◽  
Selection For ◽  
Prototype Design

This paper deals with mechanical design and material selection process for experimental milling device used in mechanochemistry. Part of this process is right optimizing shapes and dimensions with used material and manufacturing process. Our selection and design process were considering stress on individual parts, purpose of parts, future upgradability, material cost and manufacturing cost. All these factors were resulting into high usage of materials like PLA (polylactic acid) and alloys based on aluminium. These materials are generally very good for prototyping thanks to their mechanical properties and cost. For parts with high stress expectation we therefore used more durable materials. In the end we describe disadvantages of PLA materials against metals in production.

Atomic structure of interface of intermetallic compound TiAl and nitride Ti2AIN using HREM and image processing

1991 ◽  
Vol 49 ◽  
pp. 570-571
Author(s):  
E. Sukedai ◽  
H. Mabuchi ◽  
H. Hashimoto ◽  
Y. Nakayama
Keyword(s):  
Mechanical Properties ◽  
Image Processing ◽  
Composite Material ◽  
Intermetallic Compound ◽  
Side Surface ◽  
High Resolution Electron Microscopy ◽  
Hexagonal Structure ◽  
Second Phase ◽  
Resolution Electron ◽  
Compound Tial

In order to improve the mechanical properties of an intermetal1ic compound TiAl, a composite material of TiAl involving a second phase Ti2AIN was prepared by a new combustion reaction method. It is found that Ti2AIN (hexagonal structure) is a rod shape as shown in Fig.1 and its side surface is almost parallel to the basal plane, and this composite material has distinguished strength at elevated temperature and considerable toughness at room temperature comparing with TiAl single phase material. Since the property of the interface of composite materials has strong influences to their mechanical properties, the structure of the interface of intermetallic compound and nitride on the areas corresponding to 2, 3 and 4 as shown in Fig.1 was investigated using high resolution electron microscopy and image processing.

scholarly journals Acoustic Emission and K-S Metric Entropy as Methods for Determining Mechanical Properties of Composite Materials

Sensors ◽  
2020 ◽  
Vol 21 (1) ◽  
pp. 145
Author(s):  
Lesław Kyzioł ◽  
Katarzyna Panasiuk ◽  
Grzegorz Hajdukiewicz ◽  
Krzysztof Dudzik
Keyword(s):  
Mechanical Properties ◽  
Acoustic Emission ◽  
Composite Material ◽  
Composite Materials ◽  
Testing Machine ◽  
Measurement Data ◽  
Entropy Method ◽  
Displacement Sensor ◽  
Metric Entropy ◽  
Plastic Phase

Due to the unique properties of polymer composites, these materials are used in many industries, including shipbuilding (hulls of boats, yachts, motorboats, cutters, ship and cooling doors, pontoons and floats, torpedo tubes and missiles, protective shields, antenna masts, radar shields, and antennas, etc.). Modern measurement methods and tools allow to determine the properties of the composite material, already during its design. The article presents the use of the method of acoustic emission and Kolmogorov-Sinai (K-S) metric entropy to determine the mechanical properties of composites. The tested materials were polyester-glass laminate without additives and with a 10% content of polyester-glass waste. The changes taking place in the composite material during loading were visualized using a piezoelectric sensor used in the acoustic emission method. Thanks to the analysis of the RMS parameter (root mean square of the acoustic emission signal), it is possible to determine the range of stresses at which significant changes occur in the material in terms of its use as a construction material. In the K-S entropy method, an important measuring tool is the extensometer, namely the displacement sensor built into it. The results obtained during the static tensile test with the use of an extensometer allow them to be used to calculate the K-S metric entropy. Many materials, including composite materials, do not have a yield point. In principle, there are no methods for determining the transition of a material from elastic to plastic phase. The authors showed that, with the use of a modern testing machine and very high-quality instrumentation to record measurement data using the Kolmogorov-Sinai (K-S) metric entropy method and the acoustic emission (AE) method, it is possible to determine the material transition from elastic to plastic phase. Determining the yield strength of composite materials is extremely important information when designing a structure.

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