Fatigue, fracture toughness and DMA of biosilica toughened epoxy with stacked okra fiber and Al 2024‐T3 fiber metal laminate composite

This study examined how the diameter and length of corn husk fiber affects the mechanical, fatigue, and DMA properties of epoxy-based composite material. As filler, biosilica, which is made from wheat husks, was used to make composites. By hand layup process, the composites were created and then characterized as per the ASTM standards. Results revealed that the N21 composite designation offered improved tensile and flexural strength, Izod impact and hardness up to 94 MPa, 137 MPa, 3.62 J, and 86 shore-D. But compared to all composite designations, the composite designation N23 has the highest tensile and flexural strength, Izod impact, and hardness values, which are 134 MPa, 182 MPa, 4.84 J, and 88 Shore-D, respectively. Similarly, the composite designation N21 gives improved fatigue life counts of 21,629 by adding 1vol. % of biosilica and fiber length of 70 mm and diameter of 200 μm. In the same way, the highest storage modulus and loss factor of 5.5 GPa and 0.3 were noted for composite N23. The fiber diameter of 200 μm and a length of 70 mm demonstrate effective load shearing phenomenon and bonding between the fiber and matrix. Overall, the lesser diameter fiber with a higher length outperformed and it is recommended for high-performance composite making.

Section: Resultsmentioning

confidence: 99%

Effect of corn husk fiber length and diameter on load bearing, fatigue, and DMA properties of biosilica toughened epoxy composite

Pratheesh

Gurupranes²,

Kumar

et al. 2023

“…Subsequent to this, a number of investigations have been conducted on the utilization of okra fiber‐reinforced composites, which have exhibited considerable potential. Noteworthy examples include the effect of fiber content% of okra/PVA composites as reported by Khan et al, 34 the tensile characterization of okra/polyester composites as demonstrated by Srinivasababu et al, 35 the exploration of thermo‐mechanical and morphological properties of okra/starch composites as conducted by Guleria et al, 36 the investigation of okra/urea formaldehyde composites as presented by Khan et al, 37 the examination of okra/tamarind kernel/epoxy composites as reported by Sivakumar et al, 38 while Ramesh et al 39 studied the fatigue and dynamic mechanical properties of okra/aluminum 2024‐T3 foil/epoxy composites. Recent studies have focused on various aspects of okra fiber, including its extraction and surface modification using environmentally friendly methods reported by Kocak et al, 40 among the other investigations Khan et al 41 have explored the effects of chemical treatments and degumming methods on the fiber, Khan et al 42 also analyzed the impact of alkalization on biologically degummed fiber.…”

Section: Introductionmentioning

confidence: 99%

Novel okra woven fabric reinforced polylactic acid composites: Mechanical, morphological, and thermal properties

Rahman,

Zhang,

Qin

et al. 2023

Contemporary researchers are directing attention towards enhancing the structural integrity of biodegradable matrices, such as polylactic acid (PLA), through the incorporation of plant fibers. The utilization of novel fibers is becoming more prevalent to achieve the specific demands of composite applications, particularly in the automotive and packaging fields. Woven fabrics are commonly favored for reinforcing composites due to their elevated specific strength and dimensional stability. In pursuit of this context, we have developed a unique woven fabric using 100% okra fiber and utilized it in the production of PLA biocomposites. This approach was made due to the unexplored potential of okra woven fabric in the field of composite manufacturing. To optimize the performance of the composites, three distinct weight proportions of okra woven fabric (OWF) were chosen, including 20%, 30%, and 40%. The obtained composites were mechanically, morphologically, and thermally characterized. The manufactured composite's maximum tensile and thermal property was attained by adding 20% OWF to the PLA. Scanning electron microscopy analysis revealed that 20% OWF composite possessed superior fiber‐matrix adhesion, improving all properties' efficacy. The overall findings reveal that the OWF/PLA composites are promising as a green material for applications in the automotive and packaging industries.Highlights A novel class of composite has been created using 100% okra woven fabric. The composite with 20% fabric content showed the best mechanical properties. Thermal properties of composites are also optimized using 20% fabric content. SEM confirms the strong fiber‐matrix bonding of 20% OWF/PLA composites. The composites are suitable for automotive and packaging applications.

“…5 The process takes a relatively long time to complete the thermoset curing and ensure the high-performance of aircraft components. 5,10 However, when FMLs are used in mass production and applied in the civil field, efficiency and low cost must be considered. Continuous fiber-reinforced thermoplastic (FRTP) composites display excellent fracture toughness in contrast with fiber-reinforced thermoset counterparts.…”

Section: Introductionmentioning

confidence: 99%

Investigation of structure–flexural response relations in thermoplastic carbon/glass fiber‐metal laminates

Sang,

Xing,

et al. 2024

In the current work, fiber‐metal laminates (FMLs) consisting of alternated continuous fiber‐reinforced thermoplastic composite layers and aluminum alloy sheets were proposed by the hot‐pressing method. Carbon fiber‐reinforced polyamide 6 (PA6/CF) and glass fiber‐reinforced polypropylene (PP/GF) prepregs were selected as composite layers. The effect of the assembly method between composite prepreg and aluminum sheets as well as the stacking configurations on the flexural response of FMLs were investigated. Meanwhile, the macro and micro‐structural observations were performed to characterize failure mechanisms in these structures. Experimental results revealed that the strength and stiffness of hybrid FLMs depended on the material property on the surface layer. With the stacking sequence of aluminum sandwiched by PA6/CF achieved the highest flexural strength of 535.3 MPa and modulus of 63.6 GPa in the series of FMLs, which could achieve satisfied lightweight and strength‐stiffness properties. The ductile deformation of aluminum sheets and fracturing and pulling out of the fibers were the main characterized failure mechanisms of thermoplastic FMLs. For glass fiber‐metal laminates, stacking configurations of three aluminum sheets alternation with four PP/GF intermediate layers achieved a favorable flexural property. Above all, the proposed thermoplastic FMLs have great potential in civil applications especially in the automobile industry as structural parts.Highlights Thermoplastic fiber‐metal laminates are designed and fabricated. The assembly method and stacking sequences influence the flexural property. FMLs with PA6/CF and aluminum achieve satisfied strength stiffness. PP/GF prepreg and aluminum layer display ductile deformation mode.