Quasi-static compression behavior and microstructure changes in low-cost AA6061 composites

2021 ◽  
pp. 095440622110553
Author(s):  
Hariharasakthisudhan P ◽  
Hariharasudhan T ◽  
Karthik S ◽  
Sathickbasha K ◽  
Surya Rajan B
Keyword(s):  
Aspect Ratio ◽  
Strain Hardening ◽  
Axial Strain ◽  
Low Cost ◽  
Research Work ◽  
Strain Hardening Exponent ◽  
Static Compression ◽  
Compression Behavior ◽  
Maximum Value ◽  
Quasi Static Compression

The workability study of the composites enhances the understanding of the degree of plastic deformation that can be employed on it. The current research work highlights the response of the low-cost aluminum composites reinforced with exhausted alkaline battery powders under quasi-static compression. The effect of reinforcements and aspect ratio against the strain hardening exponent and strength coefficients were investigated. The microstructural changes after quasi-static compression were studied and related to the changes in the property of the composites. The composite with 6 wt.% of reinforcement showed the least amount of porosity as 1.2%. In most of the cases, the maximum value of average strain hardening exponent with respect to axial strain was noted in the composites with 6 wt. % of reinforcement. The lowest aspect ratio of 0.5 showed the maximum workability in the composites. The average strength coefficient was found to be maximum (308.58 MPa) in the composite with 2 wt.% reinforcement. The elongated grains and slip bands were observed in the microstructure of the compressed specimens.

scholarly journals Effect of Internal Microstructure Distribution on Quasi-Static Compression Behavior and Energy Absorption of Hollow Truss Structures

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5094
Author(s):  
Huilan Ren ◽  
Haiting Shen ◽  
Jianguo Ning
Keyword(s):  
Compressive Strength ◽  
Energy Absorption ◽  
Experimental Tests ◽  
Truss Structure ◽  
Truss Structures ◽  
Microstructure Design ◽  
Static Compression ◽  
Compression Behavior ◽  
Melting Technique ◽  
Quasi Static Compression

In this work, hollow truss structures with different internal microstructure distributions, i.e., basic hollow truss structure (specimen HT), hollow truss structure with internal microstructure at joints (specimen HTSJ), and hollow truss structure with internal microstructure on tube walls (specimen HTSW), were designed and manufactured using a selective laser melting technique. The effect of internal microstructure distribution on quasi-static compressive behavior and energy absorption was investigated by experimental tests and numerical simulations. The experimental results show that compressive strength and specific compressive strength of specimen HTSW increase by nearly 50% and 14% compared to specimen HT, and its energy absorption per volume and mass also increase by 52% and 15% at a strain of 0.5, respectively. However, the parameters of specimen HTSJ exhibit limited improvement or even a decrease in different degrees in comparison to specimen HT. The numerical simulation indicates that internal microstructures change the bearing capacity and structural weaknesses of the cells, resulting in the different mechanical properties and energy absorptions of the specimens. Based on the internal microstructure design in this study, adding microstructures into the internal weaknesses of the cells parallel to the loading direction is an effective way to improve the compressive properties, energy absorption and compressive stability of hollow truss structures.

Compression after impact and fatigue behavior of CFRP stiffened panels

2015 ◽  
Vol 6 (2) ◽  
pp. 176-193
Author(s):  
Roman Ružek ◽  
Konstantinos Tserpes ◽  
Evaggelos Karachalios
Keyword(s):  
Impact Damage ◽  
Fatigue Behavior ◽  
Static Compression ◽  
Compression Behavior ◽  
Content Type ◽  
Stiffened Panels ◽  
Compression After Impact ◽  
Fatigue Damage Accumulation ◽  
Ultrasound Inspection ◽  
Quasi Static Compression

Purpose – Impact and fatigue are critical loading conditions for composite aerostructures. Compression behavior after impact and fatigue is a weak point for composite fuselage panels. The purpose of this paper is to characterize experimentally the compression behavior of carbon fiber reinforced plastic (CFRP) stiffened fuselage panels after impact and fatigue. Design/methodology/approach – In total, three panels were manufactured and tested. The first panel was tested quasi-statically to measure the reference compression behavior. The second panel was subjected to impact so as to create barely visible impact damage (BVID) at different locations, then to fatigue and finally to quasi-static compression. Finally, the third panel was subjected to impact so as to create visible impact damage (VID) at different locations and then to quasi-static compression. The panels were tested using ultrasound inspection just after manufacturing to check material quality and between different tests to detect impact and fatigue damage accumulation. During tests the mechanical behavior of the panel was monitored using an optical displacement measurement system. Findings – Experimental results show that the presence of impact damage significantly degrades the compression behavior of the panels. Moreover, the combined effect of BVID and fatigue was proven more severe than VID. Originality/value – The paper gives information about the compression after impact and fatigue behavior of CFRP fuselage stiffened panels, which represent the most realistic loading scenario of composite aerostructures, and describes an integrated experimental procedure for obtaining such information.

Quasi-static compression behavior of nickel oxide, nickel oxide:zirconia, nickel:zirconia and nickel foams

2016 ◽  
Vol 42 (9) ◽  
pp. 10572-10578 ◽  
Author(s):  
Papiya Biswas ◽  
Pandu Ramavath ◽  
Chandhana Muraleedharan Nair ◽  
Madireddy Buchi Suresh ◽  
Nakula Ravi ◽  
...  
Keyword(s):  
Nickel Oxide ◽  
Static Compression ◽  
Compression Behavior ◽  
Nickel Foams ◽  
Quasi Static Compression

The effect of outer tube on quasi-static compression behavior of aluminum foam-filled tubes

2020 ◽  
Vol 245 ◽  
pp. 112357 ◽  
Author(s):  
Xudong Yang ◽  
Tao An ◽  
Ziqing Wu ◽  
Tianchun Zou ◽  
Haipeng Song ◽  
...  
Keyword(s):  
Aluminum Foam ◽  
Outer Tube ◽  
Static Compression ◽  
Compression Behavior ◽  
Foam Filled ◽  
Quasi Static Compression

Effect of Multi-Walled Carbon Nano tubes on the Quasi-Static Lateral Crushing Characteristics of Hybrid Glass-Basalt Fabric Reinforced Epoxy Tubes

2021 ◽  
Vol 13 (2) ◽  
Author(s):  
A. Praveenkumar ◽  
M. Shunmugasundaram ◽  
S. Sivasankar ◽  
L. Ponraj Sankar
Keyword(s):  
Impact Energy ◽  
Epoxy Composite ◽  
Research Work ◽  
Nano Composite ◽  
Static Compression ◽  
Deformation Curves ◽  
Cylindrical Tubes ◽  
Carbon Nano Tubes ◽  
The Impact ◽  
Quasi Static Compression

Nano composite cylindrical tubular elements could be considerably employed as energy mitigating components for dissipating the impact energy during vehicular collisions. The current research work aimed to explore the lateral crashworthiness response of Multi-Walled Carbon Nano Tubes (MWCNT) filled epoxy composite (basalt and glass fabric) tubes of three different inner diameters using quasi-static compression. Final deformed shapes and crush force vs. deformation curves of all the recommended typical tube sections are calculated and discussed elaborately. The conclusions obtained exposed that better crashworthiness features of MWCNT reinforced epoxy composite tubes with a larger diameter, were owing to the favourable deformation styles occurring during lateral crushing process. Furthermore, the suggested hybrid composite cylindrical tubes with nano-fillers might be applied as energy dissipating components in modern vehicles.

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