Particle arrangement effects on the stress intensity in composite material

Wakeel, Shahlaa Al; Ghanbari, Farshad; Hubler, Mija H.

doi:10.1016/j.engfracmech.2018.09.014

Cited by 6 publications

(4 citation statements)

References 19 publications

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“…Initially, the amounts of resin and reinforcement were weighed, taking as a reference a percent of 10% p/p of sintered clay powder and 2% p/p of catalyst. Later, mixing was done with the aid of magnetic stirring at a temperature of 80°C, in order to achieve optimum dispersion of the particles in the polymer matrix [11].…”

Section: The Manufacturing Processmentioning

confidence: 99%

Composite materials reinforced with ceramic waste and matrix of unsaturated polyester for applications in the automotive industry

Parra

Valencia

Espinosa

2020

DYNA

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In the present investigation an alternative of recycling was evaluated for the residues derived from defective pieces of the ceramic industry, harnessing them as reinforcement in composite materials for the manufacture of parts used in the automotive sector. Sintered clay microparticles to 10% p/p were mixed in an unsaturated polyester resin matrix, through the cast molding technique. Bending tests were performed that showed an elastic-linear behavior, typical of a fragile material. The structure was analyzed through scanning electron microscopy, checking the fragile failure mechanism and a good dispersion of the microparticles. A simulation was carried out with the finite element method, for the design of a motorcycle brake lever, with results that demonstrate a better distribution of stresses and reduction in mass with respect to the original part. Finally, a prototype brake lever was manufactured using computationally validated geometry.

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Section: The Manufacturing Processmentioning

confidence: 99%

Composite materials reinforced with ceramic waste and matrix of unsaturated polyester for applications in the automotive industry

Parra

Valencia

Espinosa

2020

DYNA

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“…It was found that the stress concentrations occurred in composite regions where the particles were closely packed. Previous theoretical and computational studies by Al Wakeel et al [4] of glass spherical inclusions in a brittle polymer matrix revealed that toughness correlates to the degree of inclusion order. Huang et al [5] numerically investigated the effect of coarse aggregate distribution in a two-phase composite material that consisted of cement mortar and coarse aggregate.…”

Section: Introductionmentioning

confidence: 98%

Improving Concrete Toughness by Aggregate Arrangement

2020

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The focus of this research is to address the following open question: Can we engineer the distribution of coarse aggregate in concrete to improve crack growth resistance? A finite element study of aggregates distributed in a notched 3-point bending concrete sample shows that the stress field in front of the crack tip and in the entire concrete beam is carried differently when the aggregate is arranged in a more orderly manner. Based by this, the impact of coarse aggregate arrangement is confirmed experimentally. Fracture toughness is determined from notched 3-point bending samples prepared from the same mix with three types of casting approaches: One following ASTM C31, and two following the standardized casting method with raking and shear mixing to arrange particles in a more ordered manner. To evaluate the impact of these added casting steps to alter aggregate arrangement, X-ray computed tomography (XCT) data is collected of the particle positions for statistical analysis. XCT data shows that added raking and mixing during casting adjusts the arrangement of coarse aggregate with respect to each other in a systematic manner. The mechanical tests show increased toughness can be achieved when raking and shear mixing steps are added following the ASTM C31 casting process.

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“…Hydraulic fracturing is a fundamental production enhancement measure to transform low-permeability coal reservoirs. , The production enhancement effect of hydraulic fracturing in CBM wells depends on the reservoir modification area and fracture conductivity, , and the optimization of proppant performance, especially the selection of its type, size, and concentration, is crucial. , At present, quartz sand, ceramsite, and coated proppant are mainly used in hydraulic fracturing . Quartz sand is the most widely used proppant material in the fracturing process .…”

Section: Introductionmentioning

confidence: 99%

Coalbed Methane Enhancement in Low-Permeability Reservoirs by Hydraulic Fracturing with Coated Ceramsite

Guo

Song

et al. 2023

Energy Fuels

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The overall fracturing stimulation effect using quartz sand as a proppant is poor, resulting in no breakthrough in the production of coalbed methane (CBM) wells in the low permeability coal reservoir of Lu’an Mining Area. In this study, the mixed coated ceramsite of three particle sizes (40–60, 16–40, and 12–20 mesh) was selected as a proppant to conduct a hydraulic fracturing field experiment on CBM wells, located near the three wells fractured with quartz sand in the study area. The drainage and production effects of mixed particle size-coated ceramsite and quartz sand fractured wells in the area were compared. The results show that the cumulative gas production from the coated ceramsite fractured CBM well was approximately 93,004 m3 in 238 days of gas production, with a maximum daily gas production of 825 m3/d, approximately 3.3 times that of the quartz sand fractured wells. After 400 days of gas production, the two types of proppant-fractured CBM wells differed notably, the daily gas production of the coated ceramsite-fractured well being 450–825 m3/d and that of the quartz sand-fractured wells being only 150–250 m3/d. In the stable production stage, the coated ceramsite-fractured well displayed a better gas production potential. Therefore, in view of the low permeability of the coal reservoir, the use of coated ceramsite to fracture CBM wells can achieve a more satisfactory production enhancement effect. The research findings can provide a reference for fracturing-induced production enhancement of low-permeability reservoirs.

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Particle arrangement effects on the stress intensity in composite material

Cited by 6 publications

References 19 publications

Composite materials reinforced with ceramic waste and matrix of unsaturated polyester for applications in the automotive industry

Composite materials reinforced with ceramic waste and matrix of unsaturated polyester for applications in the automotive industry

Improving Concrete Toughness by Aggregate Arrangement

Coalbed Methane Enhancement in Low-Permeability Reservoirs by Hydraulic Fracturing with Coated Ceramsite

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