Strength of double-reinforced adhesive joints

2021 ◽  
Vol 63 (2) ◽  
pp. 176-181
Author(s):  
Mehmet Şükrü Adin ◽  
Erol Kılıçkap
Keyword(s):  
Adhesive Joints ◽  
Light Weight ◽  
Specific Strength ◽  
Reinforced Composite ◽  
High Specific Strength ◽  
Glass Fiber Reinforced ◽  
Marine Industry ◽  
Seawater Corrosion ◽  
High Fatigue ◽  
Low Costs

Abstract The use of adhesive joints is increasing in aerospace, aviation, automotive, construction and marine industry due to their easily applicable properties, low-costs and light weights compared to traditional jointing methods such as bolts, rivets, welding and soldering. Due to the high fatigue strength, resistance to seawater corrosion and light weight, aluminum alloys, with their high satiety, fracture strength, light weight, high specific strength and good dimensional stability and other properties, glass fiber reinforced composite materials have widespread uses.

Experimental and Modeling Study on High Velocity Penetration of a Carbon/Epoxy Composite Laminate

2021 ◽  
Vol 904 ◽  
pp. 167-173
Author(s):  
Fang Yu Chen ◽  
Ding Feng Ma ◽  
Xiao Ming Zhou
Keyword(s):  
Impact Loading ◽  
High Velocity ◽  
Composite Laminate ◽  
Epoxy Composite ◽  
Good Choice ◽  
High Impact ◽  
Light Weight ◽  
Specific Strength ◽  
High Specific Strength ◽  
Structural Applications

In many structural applications, such as marine, aircraft and so on, structures are designed to withstand high impact loading, because they may be subjected to impact of the projectiles with high velocity [1,2] . Fabrics become good choice to resist impact of ballistic [3] because of light weight and high specific strength .

scholarly journals Light-Weight Intermetallic Titanium Aluminides – Status of Research and Development

2011 ◽  
Vol 278 ◽  
pp. 551-556 ◽  
Author(s):  
Helmut Clemens ◽  
Wilfried Smarsly
Keyword(s):  
Technological Progress ◽  
Titanium Aluminides ◽  
Low Density ◽  
Light Weight ◽  
High Melting ◽  
High Melting Point ◽  
Specific Strength ◽  
Automotive Engines ◽  
High Temperature Materials ◽  
High Specific Strength

Development and processing of high-temperature materials is the key to technological progress in engineering areas where materials have to meet extreme requirements. Examples for such areas are the aerospace and automotive industries. New structural materials have to be stronger, stiffer and lighter to withstand the extremely demanding conditions in the next generation of aero- and automotive engines. Intermetallic -TiAl based alloys exhibit numerous attractive properties which meet these demands. These properties include high melting point, low density, high specific elastic modulus, good oxidation and burn resistance, and high specific strength up to application temperatures of 700 to 800°C. Thus, current -TiAl based alloys outperform advanced Ti-based alloys and have the potential to replace heavy Ni-based superalloys.

Evaluation of Mechanical Properties of GFRP Composites Reinforced with Single Wall Carbon Nano-Tubes by Immersion in Normal and Sea Water under Hydro-Static Pressure

2018 ◽  
Vol 1148 ◽  
pp. 21-28
Author(s):  
T. Victor Babu ◽  
S. Santosh Kumar ◽  
Pala Srinivas Reddy
Keyword(s):  
Mechanical Properties ◽  
Sea Water ◽  
Single Walled Carbon Nanotube ◽  
Specific Strength ◽  
Reinforced Composite ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Fiber Reinforced Polymer Composites ◽  
Alternative Material ◽  
Carbon Nano Tubes

Fibre reinforced composite materials are demanded by the industry especially for the applications where weight reduction is critical because of their high specific strength, ability to resist corrosion. The present work aims on evaluation of various mechanical properties of glass fiber reinforced polymer composites (GFRP) with inclusion of single walled carbon nanotube (SWCNT) in different weight fractions. Before performing the tests, the specimens were allowed to immerse in fresh water and sea water simultaneously for a period of 11 days (110 Hours) under hydrostatic pressure and further observing the amount of moisture content that has been accumulated in the specimens if any. This type of material can be used in marine industries as an alternative material for fabrication of hull of a ship and also used to design and fabricate various components of a ship.

scholarly journals Methodologies for the optimal design of fibre-reinforced composite structures

2003 ◽  
Author(s):  
◽  
Ryan Elliot Smith
Keyword(s):  
Composite Structures ◽  
Specific Strength ◽  
Advantages And Disadvantages ◽  
Reinforced Composite ◽  
High Specific Strength ◽  
Reinforced Plastic ◽  
Stiffness Properties ◽  
Engineering Materials ◽  
Strength And Stiffness ◽  
Marine Engineering

Composites have become important engineering materials, especially in the fields of automotive, aerospace and marine engineering. This is due to the high specific strength and stiffness properties they offer. At present, fibre-reinforced plastic (FRP) laminates are some of the most common types of composite used. They are produced in various forms with different structural properties. As with all engineering materials, there is the existence of both advantages and disadvantages. One of the main disadvantages is the expense involved in producing both the material and the finished product. The design time is also costly as the material has to be designed concurrently with the structure.

A novel light-weight refractory high-entropy alloy with high specific strength and intrinsic deformability

2021 ◽  
Vol 287 ◽  
pp. 129255
Author(s):  
X.W. Liu ◽  
Z.C. Bai ◽  
X.F. Ding ◽  
J.Q. Yao ◽  
L. Wang ◽  
...  
Keyword(s):  
High Entropy Alloy ◽  
Light Weight ◽  
High Entropy ◽  
Specific Strength ◽  
High Specific Strength

scholarly journals Development of Light-Weight TRIP/TWIP FCC High Entropy Alloy with High Specific Strength and Large Ductility

2021 ◽  
Vol 59 (12) ◽  
pp. 857-869
Author(s):  
Kook Noh Yoon ◽  
Hyun Seok Oh ◽  
Je In Lee ◽  
Eun Soo Park
Keyword(s):  
Transition Metals ◽  
Single Phase ◽  
High Entropy Alloy ◽  
Dual Phase ◽  
Strengthening Effect ◽  
Light Weight ◽  
Atomic Size ◽  
High Entropy ◽  
Specific Strength ◽  
High Specific Strength

In this study we developed a novel (TRIP+TWIP) high entropy alloy (HEA) with high specific strength and large ductility. First, by controlling the atomic constitution of the 3d transition metals (Cr, Mn, Fe, Co, and Ni), we designed a light-weight TRIP-assisted dual-phase HEA with a non-equiatomic composition of Cr22Mn6Fe40Co26Ni6, which exhibited 5% lighter density than the Cantor HEA. Secondly, we systematically added Al (a lightweight element (2.7 g/cm3), which has a large atomic size misfit with 3d transition metals, and Ferrite stabilizer) up to 5 at.% in Cr22Mn6Fe40Co26Ni6 HEA. With increasing Al content, the phase constitution of the alloy changed from a dual-phase of FCC and HCP (0 to 2.0 at.%) to a FCC single-phase (2.5 to 3.5 at.%), to a dual-phase of FCC and BCC (4.0 to 5.0 at.%). In particular, the (Cr22Mn6Fe40Co26Ni6)97.5Al2.5 HEA with the FCC single-phase exhibited a large Hall-Petch coefficient and relatively lower thermal conductivity due to its three times larger atomic size mismatch (δ) than the Cantor HEA, which causes the superior solid solution strengthening effect. Furthermore, the (Cr22Mn6Fe40Co26Ni6)96Al4.0 HEA, a boundary composition of BCC precipitation in the FCC phase, exhibited a 10% higher specific strength than the Cantor HEA as well as 50% larger strain, due to the unique TRIP and TWIP complex deformation mechanism. This result shows that the addition of Al in Cr22Mn6Fe40Co26Ni6 HEA can result not only in greater chemical complexity due to the multicomponent high entropy compositions, but also microstructural complexity due to the increase in competing crystalline phases. The confusion effect caused by both complexities lets the alloy overcome the trade-off relationship among conflicting intrinsic properties, such as strength versus ductility (or density). Consequently, these results pave the way for a new design strategy of a novel (TRIP+TWIP) HEA with high specific strength and large ductility.

A Comparison of Weld Properties with or without Filler Wire on Laser Welding of Magnesium Alloy for Car Industry

2008 ◽  
Vol 580-582 ◽  
pp. 489-492 ◽  
Author(s):  
Mok Young Lee ◽  
Woong Seong Chang ◽  
Sook Hwan Kim
Keyword(s):  
Magnesium Alloy ◽  
Laser Welding ◽  
Alloy Sheet ◽  
Light Weight ◽  
Filler Wire ◽  
Specific Density ◽  
Car Industry ◽  
Specific Strength ◽  
High Specific Strength ◽  
Weld Properties

Magnesium alloys are becoming important material for light weight car body, due to their low specific density but high specific strength. However they have a poor weldability, caused by high oxidization tendency and low vapour temperature. In this study, the welding performance of magnesium alloy was investigated for automobile application. The material was rolled magnesium alloy sheet contains 3wt%Al, 1wt%Zn and Mg balance. The effects of filler wire addition was investigated on 2kW Nd:YAG laser welding. For the results, the mechanical properties of welded specimen were similar with base metal in laser welding with and without filler wire. The bridging ability was improved with filler wire without weld properties deterioration on laser welding of magnesium alloy.

scholarly journals Development and Characterisation of Banana and E-Glass Fiber Reinforced With Isophthalic Resin Based Composites

2020 ◽  
Vol 10 (1) ◽  
pp. 129-133
Keyword(s):  
Caustic Soda ◽  
Retention Test ◽  
Natural Fibers ◽  
Synthetic Fiber ◽  
Light Weight ◽  
Banana Fibers ◽  
Reinforced Composite ◽  
Glass Fiber Reinforced ◽  
Reinforcing Fibers ◽  
Naoh Solution

Natural fibers can have different advantages over synthetic reinforcing fibers as they are renewable .Thus the natural fibers have been used to reinforce materials in many composites structures Among the various fibers banana fibers are used because of Its light weight properties and it is locally available in all over India and Tamilnadu. Banana fibers obtained from the stem of the plant and it is a lingo cellulosic under exploited bast fibers, where E-glass being a synthetic fiber so the properties of Banana fabric reinforced composite has been compared with E-glass fabric based composites. Here the banana fabric matte is being separately treated with the caustic soda (NAOH)solution in water by the process of mercerization , both the fabric matte reinforced in isophthalic resin and filler chalk powder by 2% weight added , in order to compare their properties under various experiments such as TENSILE , HARDNESS , IMPACT , SEM and the FIRE RETENTION TEST.

Precipitation in Al-Li-Cu Alloys

1981 ◽  
Vol 39 ◽  
pp. 44-45
Author(s):  
J. E. O'Neal ◽  
K. K. Sankaran
Keyword(s):  
Electron Microscopy ◽  
Age Hardening ◽  
Precipitation Behavior ◽  
Zone Formation ◽  
Specific Strength ◽  
Hardening Behavior ◽  
Cu Alloys ◽  
High Specific Strength ◽  
Transmission Electron ◽  
Structural Applications

Al-Li-Cu alloys combine high specific strength and high specific modulus and are potential candidates for aircraft structural applications. As part of an effort to optimize Al-Li-Cu alloys for specific applications, precipitation in these alloys was studied for a range of compositions, and the mechanical behavior was correlated with the microstructures.Alloys with nominal compositions of Al-4Cu-2Li-0.2Zr, Al-2.5Cu-2.5Li-0.2Zr, and Al-l.5Cu-2.5Li-0.5Mn were argon-atomized into powder at solidification rates ≈ 103°C/s. Powders were consolidated into bar stock by vacuum pressing and extruding at 400°C. Alloy specimens were solution annealed at 530°C and aged at temperatures up to 250°C, and the resultant precipitation was studied by transmission electron microscopy (TEM).The low-temperature (≲100°C) precipitation behavior of the Al-4Cu-2Li-0.2Zr alloy is a combination of the separate precipitation behaviors of Al-Cu and Al-Li alloys. The age-hardening behavior at these temperatures is characteristic of Guinier-Preston (GP) zone formation, with additional strengthening resulting from the coherent precipitation of δ’ (Al3Li, Ll2 structure), the presence of which is revealed by the selected-area diffraction pattern (SADP) shown in Figure la.

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