Compressive behavior of fly ash based 3D printed syntactic foam composite

2019 ◽  
Vol 254 ◽  
pp. 246-249 ◽  
Author(s):  
Balu Patil ◽  
B.R. Bharath Kumar ◽  
Mrityunjay Doddamani
Keyword(s):  
Fly Ash ◽  
Syntactic Foam ◽  
Compressive Behavior ◽  
Foam Composite ◽  
3D Printed

Loading Effect of Hollow Glass Microsphere (HGM) and Foam Microstructure on the Specific Mechanical Properties and Water Absorption of Syntactic Foam Composite

2021 ◽  
Vol 56 ◽  
pp. 34-50
Author(s):  
Olusegun Adigun Afolabi ◽  
Krishnan Kanny ◽  
Turup Mohan
Keyword(s):  
Water Absorption ◽  
Volume Fraction ◽  
Syntactic Foam ◽  
Density Variation ◽  
Absorption Capacity ◽  
Neat Epoxy ◽  
Hollow Glass Microsphere ◽  
Hollow Glass ◽  
Marine Application ◽  
Foam Composite

AbstractEpoxy syntactic foams (SF) filled with hollow glass microspheres (HGM) were prepared by simple resin casting method and characterization in this study. The effect of varying the amount of HGM on the specific mechanical and water absorption properties of SF composites were investigated. Five different composition of SF (SFT60-0.5 to SFT60-2.5) were compared with the neat epoxy matrix. The wall thickness of the microballoons differ because of its different percentile size distribution (10th, 50th and 90th), which reflects in its density variation. The results show that the specific tensile and flexural strength increases with an increasing filler (HGM) content. The density of SF filled with HGM reduces with increasing volume fraction of filler content. Scanning electron microscopy was done on the failed samples to examine the fractured surfaces. The water absorption capacity of the SF was also investigated as it relates to the HGM volume fraction variation. All the syntactic foam composition shows a better diffusion coefficient capacity than the neat epoxy resin. This makes it applicable in structural purposes and several marine application products such as Autonomous Ultimately Vehicle (AUV).

Fishing line artificial muscle reinforced composite for impact mitigation and on-demand damage healing

2016 ◽  
Vol 50 (30) ◽  
pp. 4235-4249 ◽  
Author(s):  
Pengfei Zhang ◽  
Guoqiang Li
Keyword(s):  
Low Cost ◽  
Syntactic Foam ◽  
Artificial Muscle ◽  
High Strength ◽  
Composite Panel ◽  
On Demand ◽  
Healing Efficiency ◽  
Foam Composite ◽  
Damage Healing ◽  
The Impact

In this study, a fishing line artificial muscle reinforced syntactic foam composite was investigated. About 3.5 vol.% of polymer artificial muscle was woven into a two-dimensional grid skeleton and embedded into a syntactic foam matrix. The grid-stiffened syntactic foam composite was designed to be able to repeatedly heal cracks on-demand. Short thermoplastic fibers were also dispersed into the foam matrix both as reinforcement and as a healing agent. The composite panel was repeatedly impacted, bending fractured, and healed as per the biomimetic close-then-heal strategy. It is found that the composite panel responds to impact quasi-statically. The impact- and bending-induced macroscopic cracks can be repeatedly healed with high healing efficiency, under both free and clamped boundary conditions. Contrary to most healing systems, the healing efficiency within the damage–healing cycles in this study increases as the damage-healing cycle increases. Because the artificial muscle is made of low-cost and high-strength fishing line, it is envisioned that the composite panel developed in this study may be a viable alternative core for healable lightweight composite sandwich structures at competitive cost.

An experimental and numerical study on the tensile and compressive behavior of 3D printed biomimetic structures

2020 ◽  
Author(s):  
A.S. Prasanth ◽  
Ramesh R. ◽  
Nathish Kumar S. ◽  
Keshav Radhakrishnan ◽  
Pratek Krishna
Keyword(s):  
Numerical Study ◽  
Compressive Behavior ◽  
3D Printed ◽  
Biomimetic Structures

Preparation and characterization of a fly ash and cement-based foam composite

2020 ◽  
Vol 10 (10) ◽  
pp. 1758-1763
Author(s):  
Liang Zhao ◽  
Qian Huang ◽  
Qunhu Xue ◽  
Shuang Yao ◽  
Xiang Li
Keyword(s):  
Fly Ash ◽  
Glass Fiber ◽  
Raw Materials ◽  
Dry Density ◽  
Rosin Soap ◽  
Foaming Process ◽  
Reinforcing Agent ◽  
Foam Composite ◽  
The Stability

Industrial waste fly ash and ordinary Portland cement (PO42.5) were used as the main raw materials, Ca(OH)2 as the alkali activator, modified rosin soap as the foaming agent, and glass fiber as the reinforcing agent. A physical foaming technology was chosen to fabricate a fly ash and cement-based foam composite. The effects of water-to-binder (W/B) ratio and glass fiber addition on the performance of the foam composite were studied. The structure formation and reinforcement mechanism of the foam composite were discussed, and the optimal formulation was determined, which provides a new technical approach to utilize fly ash and improve the strength and reliability of foam cement products. The results show that different water-to-binder ratios directly affect the stability of the pores during the foaming process, and the glass fiber has a protective effect on the foam. When the W/B ratio is 0.5, meanwhile the addition of glass fiber is 1.5%, the fly ash and cement-based foam composite can achieve better physical performance: the dry density is 368 kg/m3, the water absorption rate is 39.12%, and the 28-day compressive strength is increased by 86.31% (reaching 3.47 MPa) compared to that of the sample without a glass fiber.

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