Bending Strength of Cast Materials Reinforced with Hard Particles

2010 ◽  
Vol 457 ◽  
pp. 404-409
Author(s):  
Setsuo Aso ◽  
Hiroyuki Ike ◽  
Ken-Ichi Ohguchi ◽  
Yoshinari Komastu ◽  
Nobuo Konishi
Keyword(s):  
Composite Material ◽  
Bending Strength ◽  
Composite Layer ◽  
Cemented Carbide ◽  
Bending Test ◽  
Spheroidal Graphite ◽  
Four Point Bending ◽  
Hard Particles ◽  
Particle Reinforced Composite ◽  
Insertion Process

Particle reinforcement via the insertion of hard particles is a promising process in materials reinforcing. Particle-reinforced spheroidal graphite martensitic cast iron (SGMC), in which mixed particles of cermet and cemented carbide are dispersed, was achieved by an insertion process. A four-point bending strength test was applied to evaluate the particle composite material. An evaporative pattern process was used on the bending-test specimen to form a composite layer in the central part. Using a combination of three sizes of cermet particles and two sizes of cemented-carbide particles, the bending strength was found to increase with each small-particle combination. The Weibull coefficient m of the four-point bending strength of the particle-reinforced composite material (PRCM) ranged from 4 to 13, and m was large in the specimen with large bending strength.

Research on Damage and Bending Properties of AZ31 Magnesium Alloy

2012 ◽  
Vol 184-185 ◽  
pp. 1163-1166
Author(s):  
Xi An Xie ◽  
Gao Feng Quan
Keyword(s):  
Magnesium Alloy ◽  
Applied Load ◽  
Bending Strength ◽  
Az31 Magnesium Alloy ◽  
Bending Test ◽  
Bending Properties ◽  
Four Point Bending ◽  
Heat Treated ◽  
Four Point Bending Test ◽  
Initial Cracks

Through the four-point bending test of lath-shaped heat treated AZ31 magnesium alloy, the bending properties and damage characteristics were explored. The results show that the optimal bending strength of the magnesium alloy were 355.1MPa and 259.2MPa for extruded and cast samples, respectively, after corresponding heat treatment with 350°C, 90min and 400°C, 30min. The initial cracks both occurred at the loading point after applied load exceeded the yield limit of AZ31 magnesium alloy. Surface bump, cracks and other damage morphology accompanied by a large number of twinning organizations were found on the surface of the samples.

scholarly journals Structural Behavior of High Strength Laced Reinforced Concrete One Way Slab Exposed to Fire Flame

2019 ◽  
Vol 5 (12) ◽  
pp. 2747-2761
Author(s):  
Anas Ibrahim Abdullah
Keyword(s):  
Reinforced Concrete ◽  
Bending Strength ◽  
High Strength ◽  
Bending Test ◽  
Structural Members ◽  
Four Point Bending ◽  
Steady State Temperature ◽  
Average Residual ◽  
Fire Flame ◽  
Geometric Layout

In this study, an experimental investigation had conducted for six high strength laced reinforced concrete one-way slabs to discover the behavior of laced structural members after being exposed to fire flame (high temperature). Self-compacted concrete (SCC) had used to achieve easy casting and high strength concrete. All the adopted specimens were identical in their compressive strength of ( , geometric layout 2000 750 150 mm and reinforcement specifics except those of lacing steel content, three ratios of laced steel reinforcement of (0.0021, 0.0040 and 0.0060) were adopted. Three specimens were fired with a steady state temperature of  for two hours duration and then after the specimens were cooled suddenly by spraying water. The simply supported slabs were tested for flexure behavior with two line loads applied in the middle third of the slab (four-point bending test). The average residual percentage of cubic compression strength and splitting tensile strength were 57.5% and 50% respectively. The outcomes indicated that the residual bending strength of the burned slabs with laced ratios (0.0021, 0.004, 0.006) were (72.56, 70.54 and 70.82%) respectively. However; an increase in the deflection was gained to be (11.34, 14.67 and 17.22%) respectively with respect to non-burned specimens.

Waste size and lay up sequence strategy for reusing/recycling carbon fiber fabric in laminate composite: Mechanical property analysis

2021 ◽  
pp. 002199832110370
Author(s):  
Marcos Yutaka Shiino ◽  
Thais Carolina Gonçalves Cipó ◽  
Maurício Vicente Donadon ◽  
Alexei Essiptchouk
Keyword(s):  
Carbon Fiber ◽  
Mechanical Strength ◽  
Composite Structures ◽  
Bending Strength ◽  
Woven Fabrics ◽  
Bending Test ◽  
Four Point Bending ◽  
A Value ◽  
Strength Based ◽  
Pet Film

Carbon fiber fabrics have been largely used in composite structures as they provide high mechanical strength and potential weigh reduction, allowing more efficiency in product design. However, the production of the parts generates scraps that is discarded as a waste, becoming a challenge to recycle the carbon fiber with predictable mechanical strength. Within this context, this research analyzed strategies of laying up carbon woven fabrics based scraps, in order to reach a desirable mechanical properties in bending loading. Three types of laminates were manufactured using varied fabric size and number of discontinuities in the layup combined with polyethylene terephthalate (PET) film as a matrix. The obtained composites were tested under four-point-bending test and an energy-strength based analysis was conducted. This analysis explained a strategic position of fabric scrap to maximize the bending strength: providing a value of 106.33 MPa for a composite with high number of discontinuities against 83.11 MPa for another with less discontinuity.

EFFECTS OF BAMBOO ON FRACTURE CHARACTERISTICS OF BAMBOO REINFORCED CALCIUM CONCRETE MEMBER

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Atsushi Shimabukuro ◽  
Mitsuaki Yamato
Keyword(s):  
Bending Strength ◽  
Bending Test ◽  
Concrete Member ◽  
Engineering Material ◽  
Fracture Characteristics ◽  
Fracture Properties ◽  
Four Point Bending ◽  
Reinforcement Material ◽  
Four Point Bending Test ◽  
Environmental Burdens

The calcium-based solidification material enables us to expect the reduction of environmental burdens because it is near-neutral. We defined the concrete using this material as Calcium (Ca) concrete, and we have performed some experiments to investigate the properties of this concrete. From these results of previous experiments, we think that Ca concrete will be effective material on strength as a new civil engineering material. However, it is difficult to use steel as reinforcement material in Ca concrete due to near-neutral. Therefore, the bamboo is used as reinforcement material in this paper. And, the effect of bamboo as reinforcement material in Ca concrete is examined by investigating the fracture properties of Ca concrete reinforced by bamboo from four-point bending test. In particular, this investigation pays attention to the effect of the number of reinforcing bamboo. As a result, it becomes clear that the bending strength of Ca concrete with reinforcing bamboo is stronger than the strength of Ca concrete without reinforcing bamboo.

scholarly journals Assessment of Bending Properties of Sawn and Glulam Blackwood in Portugal

Forests ◽  
2020 ◽  
Vol 11 (4) ◽  
pp. 418 ◽  
Author(s):  
Carlos Martins ◽  
Sandra Monteiro ◽  
Sofia Knapic ◽  
Alfredo Dias
Keyword(s):  
Bending Strength ◽  
Longitudinal Vibration ◽  
Raw Material ◽  
Bending Test ◽  
Mean Values ◽  
Four Point Bending ◽  
Structural Applications ◽  
Four Point Bending Test ◽  
The University ◽  
Non Destructive

Portuguese forests have changed in recent years. These changes were mainly boosted by the wildfires that affected a significant percentage of the softwood area. Data from 2015, conveyed by the Portuguese Institute for Nature Conservation and Forests, indicates that hardwoods occupy 70% of the Portuguese forest area. This paper presents the Blackwood (Acacia melanoxylon R. Br.) species potential, focusing on construction applications, based on recent studies performed at the University of Coimbra and SerQ—Forest Innovation and Competences Center. The valuation of Blackwood for structural applications has been considered through the non-destructive and destructive assessment of their mechanical properties as sawn wood. Their potential was also assessed for a more technologically engineered wood product, the glulam. The dynamic modulus of elasticity (MOE) was estimated through the Longitudinal Vibration Method (LVM) and the Transformed Section Method (TSM); the static MOE and bending strength were assessed through a four-point bending test. Agreement was obtained between both approaches. Sawn Portuguese Blackwood showed a density of 647 kg/m3, 13,900 MPa of MOE and a bending strength of 65 MPa (mean values). The glulam beams fabricated with this raw material had improved properties relative to sawn wood, most obviously concerning the bending strength, with an improvement of 29%. This proves the significant ability and potential of these species to be used in construction products with structural purposes like sawn wood and glulam.

Bending Behavior of Glass Fiber Grid Reinforced Gussasphalt

2015 ◽  
Vol 744-746 ◽  
pp. 754-757
Author(s):  
Bo Gao ◽  
Min Wang ◽  
Zeng Heng Hao
Keyword(s):  
Composite Material ◽  
High Temperature ◽  
Glass Fiber ◽  
Bending Strength ◽  
Bending Test ◽  
Material Technology ◽  
Bending Performance ◽  
Three Point Bending ◽  
Bending Strain ◽  
Bending Behavior

In combination with the composite material technology, add the glass fiber grid into gussasphalt deck pavement system to form glass fiber grid reinforced gussasphalt. Analysis shows that adding the grid can increase the bending performance. Three point bending test was did to do verification and results were indicate that glass fiber grid can improve the anti-bending strength and anti-bending strain in high temperature.

scholarly journals Mechanical Characterization of DCPD and ENB Healing Systems in Glass Fibre Composites

2020 ◽  
Vol 57 (1) ◽  
pp. 278-289 ◽  
Author(s):  
Ionut Sebastian Vintila ◽  
Teodor Badea ◽  
Sorin Draghici ◽  
Horia Alexandru Petrescu ◽  
Andreia Cucuruz ◽  
...  
Keyword(s):  
Composite Material ◽  
Thermal Cycling ◽  
Glass Fibre ◽  
Bending Strength ◽  
Mechanical Characterization ◽  
Bending Test ◽  
Glass Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Glass Fibre Reinforced

The present paper is focused on evaluating the mechanical characterization of dicyclopentadiene (DCPD) and 5-ethylidene-2-norbornene (ENB) healing systems synthetized by in-situ polymerisation. Both healing systems were embedded in glass fibre reinforced polymer (GFRP) composite and subjected to three-point bending test regime. Microstructural and FT-IR analysis showed the formation of microcapsules and a successful integration in the composite material. To observe the influence of temperature variation, some specimens were exposed to thermal cycling (-20oC to +100oC) for 12 hours and tested in the same conditions. It was observed that the addition of microcapsules in the composite material decreased its mechanical properties by 8% and 10% for DCPD system and ENB system respectively. Thermal cycling suggested a drop of 24% on bending strength for DCPD system and 17% for ENB. Resting after 24 hours showed a healing recovery of 74% for DCPD healing system and of 97% for ENB system.

Cement Composite Reinforced with Synthetic Fibers: Comparison of Three-Point and Four-Point Bending Test Results

2016 ◽  
Vol 827 ◽  
pp. 332-335 ◽  
Author(s):  
Jaroslav Topič ◽  
Jan Bartoš ◽  
Lubomír Kopecký ◽  
Karel Šeps ◽  
Zdeněk Prošek ◽  
...  
Keyword(s):  
Bending Strength ◽  
Cement Composite ◽  
Bending Test ◽  
Test Results ◽  
Recycled Pet ◽  
Bending Tests ◽  
Synthetic Fibers ◽  
Four Point Bending ◽  
Pet Fibers ◽  
Four Point Bending Test

Presented article deals with the influence of PET fiber production on the bending strength of cement-based composite when incorporated into the fresh mortar, and comparison of results of 3-point and 4-point bending test. Cement paste samples were reinforced with 2 wt. % of primary or recycled PET fibers. The bending test was performed on prismatic samples with dimension of 40 × 40 × 160 mm. It was found that samples with recycled PET fibers, compared to primary ones, exhibit a decrease in bending strength. In the case of 4-point bending tests, the samples with recycled PET fibers exhibited higher bending strength than reference samples without any fibers. However, in the case of 3-point bending tests, the samples with recycled PET fibers had lower bending strength than the reference ones. The results suggest that recycled PET fibers could be used as an alternative to reinforce cement-based composites.

scholarly journals Composite Materials Characteristic Analysis of Marble Waste And Resin With Bending Test

2018 ◽  
Vol 3 (2) ◽  
pp. 93
Author(s):  
Ihsan Ihsan Ihsan ◽  
Nuzuli Fitriadi
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Bending Strength ◽  
Daily Life ◽  
Bending Test ◽  
Characteristic Analysis ◽  
Mixing Ratios ◽  
Natural Rock ◽  
Marble Powder ◽  
Marble Waste

Marble is a natural rock product that is widely used in daily life. There is a lot of marble powder as a by-product during the production process. This powder can be converted into valuable items. To transform this by-product to be economically valuable items, there is a way to propagate composite products from marble powder and resin. There are four composite mixing ratios carried out in this research, namely 50/50%, 40/60%, 30/70%, and 20/80%. The mixing composites test shows bending strength and elasticity of the composite material.

Increase of bending strength and maximum deflection of concrete reinforced with CFRP strips

2011 ◽  
Vol 18 (1-2) ◽  
pp. 93-97
Author(s):  
Goichi Ben ◽  
Kazuhiro Sakata ◽  
Kazuma Saito
Keyword(s):  
High Performance ◽  
Bending Strength ◽  
Concrete Beams ◽  
Beam Theory ◽  
Design Criterion ◽  
Test Method ◽  
Bending Test ◽  
Plastic Behavior ◽  
Four Point Bending ◽  
Miyagi Prefecture

AbstractIn 1981, many detached houses collapsed owing to the earthquake which took place at the coast of Miyagi Prefecture in Japan, because ferroconcrete was not used as the base of most of the collapsed houses. Therefore, the earthquake-proof design criterion was revised and it was obliged to use ferroconcrete as the base of detached houses ever since. However, there are still more than 10 million detached houses using aged concrete as the base in Japan. In this paper, a reinforcement method for the aged concrete is demonstrated by using the high performance carbon fiber reinforced plastic (CFRP) strips. Three kinds of concrete beams reinforced with the CFRP strips with different vertical insert positions and different numbers of the CFRP strips were tested by a four point bending test method. In order to clarify the effects of CFRP strips, a concrete beam without reinforcement was also tested. The results of the experiment showed that the maximum deflections of the concrete beams reinforced with the CFRP strip were more than 100 times larger than those of the concrete beams without reinforcement. Although the concrete beams without the CFRP strips collapsed instantly, the concrete beams reinforced with the CFRP strips gradually failed, which were similar to the plastic behavior of metals. This result means that the residents can afford to escape safely from the houses in the event of possible earthquakes. The experimental results were compared with the analytical ones obtained from the composite beam theory and the failure criterion. Both results showed good agreement and the effectiveness of base concrete reinforced with CFRP strips was demonstrated.

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