232 Fatigue Behavior of Unidirectional Jute Spun Yarn Reinforced PLA

Katogi, Hideaki; Shimamura, Yoshinobu; Tohgo, Keiichiro; Fujii, Tomoyuki

doi:10.1299/jsmemp.2010.18._232-1_

Cited by 6 publications

(9 citation statements)

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“…Jute fibers are typical examples of natural fibrous reinforcement extracted from the stem of Jute plants, and are one of the most affordable natural fibers available in the market, second only to cotton in terms of amount produced and varieties of applications (baskets, carpets, shoes, cloths and ropes). Several research groups have carried extensive studies on the mechanical properties of jute fibers and its derived plastic composites [18][19][20][21][22][23][24][25]. Katogi et al [21] tested unidirectional jute spun yarn reinforced biodegradable resin under static and fatigue tensile loading.…”

Section: Introductionmentioning

confidence: 99%

“…Several research groups have carried extensive studies on the mechanical properties of jute fibers and its derived plastic composites [18][19][20][21][22][23][24][25]. Katogi et al [21] tested unidirectional jute spun yarn reinforced biodegradable resin under static and fatigue tensile loading. They reported an ultimate tensile strength of 60.9 MPa and an endurance limit of 55% for their composite material.…”

Section: Introductionmentioning

confidence: 99%

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Multi-axial mechanical characterization of jute fiber/polyester composite materials

Dobah

Bourchak

Bezazi

et al. 2016

Composites Part B: Engineering

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The work describes the mechanics of novel woven jute fibers reinforced polyester (JFRP) laminates under uniaxial and multi-axial static and fatigue loading cases. JFRP laminates with 25 % fibre volume fraction (FVF) have been manufactured using a hand-layup molding technique at a low pressure. Static uniaxial tests have shown that these novel bio-reinforced laminates have an ultimate tensile strength around 42 MPa under tensile loading and 7.5 N-m under torsional loading. The Multi-axial (tension/torsion) static tests yield an ultimate strength of 21.7 MPa and 5 N-m for tensile and torsion loading conditions, respectively.Fatigue tests have been carried out under displacement and angular control at three different loading levels with a frequency of 5Hz. The fatigue tests results are extensively analyzed using stiffness degradation behavior, hysteresis loops, energy dissipation and strain versus number of cycles (ɛ-N) diagrams. The fatigue endurance limit (over one million cycles) for JFRP is achieved at a stress level of 65% of ultimate displacement. The implication of this work is the use of these materials in areas such as car and aircraft interiors promises to significantly reduce weight, cost and carbon footprints without sacrificing performance.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multi-axial mechanical characterization of jute fiber/polyester composite materials

Dobah

Bourchak

Bezazi

et al. 2016

Composites Part B: Engineering

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“…Tensile strength of the green composite using unidirectional flax sliver was found similar to that of aluminum. Katogi et al [13] reported on the fatigue properties of unidirectional jute spun yarn, a reinforced green composite. The fatigue strength at 1 million cycles of the green composite was similar to that of glass-fiber-reinforced plastic.…”

Section: Introductionmentioning

confidence: 99%

Creep Rupture of Water-Absorbed Green Composite

Katogi¹,

Takemura²

2017

Materials and Contact Characterisation VIII

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The creep rupture properties of a water-absorbed green composite were examined and assessed for long-term safety. Plain woven jute fiber cloth was used as a reinforcement and a poly-lactic acid (PLA) resin sheet was used as a matrix. A water-absorption test of this green composite was conducted at room temperature, for 24 hours: The water absorption rate at 24 hours was 8%. Quasistatic tensile tests of water-absorbed green composites were conducted at a crosshead speed 0.1, 1.0 and 10 mm/min; as well as on non-water-treated control material. Tensile creep tests of the nonwater-treated and 8% water-absorbed green composites were conducted. The environmental temperature was room temperature. The maximum test time was 100 hours. We found that Young's modulus and tensile strength of the non-water-treated and the 8% water-absorbed green composite increased with an increase in the strain rates. Young's modulus and tensile strength of the 8% waterabsorbed green composite were lower than those of the non-water-absorbed green composite, under all strain rates. Creep rupture strengths of the non-water-absorbed and the 8% water-absorbed green composites decreased with an increase of loading time. The creep rupture life of the 8% waterabsorbed green composite was lower than that of the non-water absorbed green composite. Generally, the glass transition temperature of PLA resin was decreased by water absorption; therefore, the creep rupture property of the green composite studied was mainly affected, due to a decrease of the viscoelasticity of the matrix by water absorption.

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“…There are some reports about the molding condition [2][3][4] and mechanical properties [5][6][7][8][9] of green composites. And the design and fabrication of a micro EV (Electric Vehicle) made of green composites have been studied [10].…”

Section: Introductionmentioning

confidence: 99%

The effect of soil on the biodegradable behavior of green composites under various environmental (ambient) temperatures

Katogi¹,

Takemura²

2015

Materials Characterisation VII

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In this study, the biodegradable behavior of green composites under different pH (concentration of hydrogen ion) soil and environmental temperature was investigated. The biodegradation test was conducted in 90 days. The environmental temperatures were room temperature (RT) and 50°C. The acid soil (pH 4.2), neutral soil (pH 5.5) and alkali soil (pH 7.4) were used as environmental soil. A quasi-static tensile test was conducted after the biodegradation test. As a result, the mass rate of green composites in all soils at RT almost did not change by 60 days. After that, their mass rates decreased. The mass rates of green composites in all soils at 50°C moderately decreased with an increase of biodegradation time by 60 days. After that, their mass rates rapidly decreased. In the case of all soils at RT and 50°C, the tensile strength and Young's modulus of green composites decreased with an increase of biodegradation time by 60 days. After that, they did not change any more. The tensile strength of the composites in all soils at 50°C decreased with an increase of biodegradation time by 60 days. After that, they moderately decreased except for acid soil. Young's modulus of composites in all soils for 30 days at 50°C rapidly decreased. After that, their Young's modulus moderately decreased. Their results implied that the tensile property of green composites decreased due to the biodegradation of PLA resin in soils at environmental temperatures.

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232 Fatigue Behavior of Unidirectional Jute Spun Yarn Reinforced PLA

Cited by 6 publications

References 0 publications

Multi-axial mechanical characterization of jute fiber/polyester composite materials

Multi-axial mechanical characterization of jute fiber/polyester composite materials

Creep Rupture of Water-Absorbed Green Composite

The effect of soil on the biodegradable behavior of green composites under various environmental (ambient) temperatures

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