Analytical and Statistical Evaluation of FRC Bending Tests Layouts

2015 ◽  
Vol 1106 ◽  
pp. 118-121 ◽  
Author(s):  
Adam Podstawka ◽  
Martin Kovar ◽  
Marek Foglar ◽  
Vladimir Kristek
Keyword(s):  
Statistical Evaluation ◽  
Bending Test ◽  
Experimental Program ◽  
Bending Tests ◽  
Fracture Properties ◽  
Three Point Bending ◽  
Four Point Bending ◽  
Mechanical And Fracture Properties ◽  
Four Point Bending Test

Paper compares and discusses two different layouts of testing of mechanical and fracture properties of FRC, the three-point bending test and four-point bending test. The basis is extensive experimental program and analytical and statistical evaluation.

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 Four-Point Bending Tests to Study the So-Called Plasticity Effect on the Residual Stress Results Determined by the Hole-Drilling and Ring-Core Methods

2014 ◽  
Vol 996 ◽  
pp. 319-324
Author(s):  
David von Mirbach
Keyword(s):  
Residual Stress ◽  
Bending Test ◽  
Hole Drilling ◽  
Test Machine ◽  
Bending Tests ◽  
Hole Drilling Method ◽  
Four Point Bending ◽  
Drilling Method ◽  
Four Point Bending Test ◽  
Ring Core

The hole-drilling method (HDM) and ring core method (RCM) are limited to low residual stresses under 60% of the yield stress. This issue will experimentally analyze the method of adaptive calculation function, presented by the author on the ICRS9. With a four-point-bending test machine, a defined stress can be triggered between the middle bending. In this defined loading area, the strains in two load cases with the HDM and the RCM configuration were measured. With these measured strains the residual stress calculation will be analysed.

Analysis of iron aluminide coated beams under creep conditions in high-temperature four-point bending tests

2018 ◽  
Vol 53 (4) ◽  
pp. 255-265 ◽  
Author(s):  
Joachim Nordmann ◽  
Philipp Thiem ◽  
Nuria Cinca ◽  
Konstantin Naumenko ◽  
Manja Krüger
Keyword(s):  
High Temperature ◽  
Creep Behaviour ◽  
Substrate Material ◽  
Iron Aluminide ◽  
Bending Test ◽  
Bending Tests ◽  
Four Point Bending ◽  
Wear And Corrosion ◽  
Four Point Bending Test ◽  
Wear And Corrosion Resistance

Recent research is focused on the possibility to coat a metallic alloy with intermetallics or ceramics to improve wear and corrosion resistance, as well as creep behaviour at high temperatures, next to other properties of the alloy. Nowadays, this gains importance due to stricter environment guidelines. Here, we present a model to describe a non-symmetric compound in a high-temperature four-point bending test, performed at [Formula: see text]. The substrate material is an aluminium alloy AlSi10MgT6, and the coating material is the iron aluminide Fe24Al0.6Nb. Up next, a layer-wise theory is introduced to calculate the forces between substrate and coating. Furthermore, required material parameters are identified, and a new procedure to determine Young’s modulus of a coating is presented. Finally, simulation results are compared to experimental data, illustrating that the presented model is able to describe the material behaviour accurately.

Coupled Nanoscratch and 4-Point Bending Evaluations of Adhesion in SiCN/Cu/Ta/TaN/SiO2/Si Stacked Layers

2008 ◽  
Vol 1086 ◽  
Author(s):  
Kouji Yoneda ◽  
Satoshi Shimizu ◽  
Nobuo Kojima ◽  
Chikai Sato ◽  
Jiping Ye
Keyword(s):  
Thin Film ◽  
Plastic Deformation ◽  
Small Area ◽  
Bending Test ◽  
Adhesion Properties ◽  
Bending Tests ◽  
Four Point Bending ◽  
Quantitative Measurements ◽  
Similarities And Differences ◽  
Four Point Bending Test

AbstractNanoscratch test used for small area measurements and four-point bending test applied for quantitative measurements were coupled to evaluate the adhesive strengths of SiCN/Cu/Ta,/TaN/SiO2/Si stacked layers. The similarities and differences of the two methods concerning adhesion, position of the delamination interface, and plastic deformation of the delaminated film were estimated. It was found that the nanoscratch test gave similar adhesion properties when the delamination interface was the same as that formed by the four-point bending test. The four-point bending test displayed clearer results compared to the nanoscratch test because energy for delamination was not used in plastic deformation and the crack could propagate further. These results suggest that coupling the nanoscratch and four-point bending tests is powerful way to estimate and understand adhesion of thin film materials.

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 MEASURMENT OF BENDING PROPERTIES OF RHIZOPHORA TROPICAL WOOD

2017 ◽  
Vol 27 (2) ◽  
pp. 73-84
Author(s):  
Sinin Hamdan ◽  
Mahbub Hasan ◽  
Yoann Nohe
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Bending Test ◽  
Proportional Limit ◽  
Bending Properties ◽  
Bending Tests ◽  
Four Point Bending ◽  
Limit Stress ◽  
Four Point Bending Test ◽  
Proportional Limit Stress

The Young’s modulus, load at the yield point and proportional limit stress from the compression bending (cb) test were compared with the four point bending tests (4pb). The theoretical Young’s modulus are larger than the real reading for 5mm and 10mm thick specimens, except for 200mm long specimens due to specimen nonlinearity. The experimental results for the short specimens are slightly high compared to the theory due to uniaxial compression in both tensile and compressive planes. Since the additional deflection produced by the shearing force and the stress concentration at the loading point was smaller with the compression bending test compared to the conventional four point bending test the values of Ecb are larger than E4pb. It is noted that when length/thickness (l/t)>80, the values of Ecb are scattered. In addition, Ecb decrease sharply when l/t<30. In order to obtain a stable Young’s modulus value, it is suggested that the l/t should be 30~80.

scholarly journals Measurement of the Shear Properties of Extruded Polystyrene Foam by In-Plane Shear and Asymmetric Four-Point Bending Tests

Polymers ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 47 ◽  
Author(s):  
Hiroshi Yoshihara ◽  
Makoto Maruta
Keyword(s):  
Shear Strength ◽  
Shear Modulus ◽  
Shear Test ◽  
Bending Test ◽  
Polystyrene Foam ◽  
Plane Shear ◽  
Bending Tests ◽  
Four Point Bending ◽  
Four Point Bending Test ◽  
Extruded Polystyrene Foam

The shear modulus and shear strength of extruded polystyrene foam were obtained by the in-plane shear and asymmetric four-point bending tests. In addition, the test data were numerically analysed, and the effectiveness of these tests was examined. The numerical and experimental results suggest that the shear modulus and shear strength obtained from the in-plane shear test are significantly smaller than those obtained from the asymmetric four-point bending test because the influence of the stress concentration was less significant. Although the in-plane shear test is standardised in ASTM C273/C273M-11, it is considerable to adopt the asymmetric four-point bending test as another candidate for obtaining the shear properties of extruded polystyrene foam.

scholarly journals Measurment of bending properties of rhizophora tropical wood

2017 ◽  
Vol 26 (2) ◽  
pp. 73-84
Author(s):  
Sinin Hamdan ◽  
Mahbub Hasan ◽  
Yoann Nohe
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Bending Test ◽  
Proportional Limit ◽  
Bending Properties ◽  
Bending Tests ◽  
Four Point Bending ◽  
Limit Stress ◽  
Four Point Bending Test ◽  
Proportional Limit Stress

The Young’s modulus, load at the yield point and proportional limit stress from the compression bending (cb) test were compared with the four point bending tests (4pb). The theoretical Young’s modulus are larger than the real reading for 5mm and 10mm thick specimens, except for 200mm long specimens due to specimen nonlinearity. The experimental results for the short specimens are slightly high compared to the theory due to uniaxial compression in both tensile and compressive planes. Since the additional deflection produced by the shearing force and the stress concentration at the loading point was smaller with the compression bending test compared to the conventional four point bending test the values of Ecb are larger than E4pb. It is noted that when length/thickness (l/t)>80, the values of Ecb are scattered. In addition, Ecb decrease sharply when l/t<30. In order to obtain a stable Young’s modulus value, it is suggested that the l/t should be 30~80.

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