Influence of some test parameters on specimen loading determination methods in instrumented Charpy impact tests

Landrein, P; Lorriot, T.; Guillaumat, Laurent

doi:10.1016/s0013-7944(01)00062-5

Cited by 25 publications

(17 citation statements)

References 17 publications

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“…4 Without uniformity of test results, the impact tests are almost meaningless as comparisons cannot be made. 5 Therefore, it is vital to study the factors affecting the impact results scatter in order to have a better understanding of the test methods applied. 3 Impact properties are amongst the most important material behavior that needs to be known before deciding on an application for a specific purpose.…”

Section: Introductionmentioning

confidence: 99%

Impact properties of injection molded glass fiber/polyamide-6 composites: effect of testing parameters

Hassan

Rafiq

2011

Journal of Reinforced Plastics and Composites

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Reported data on impact properties show that wide discrepancies exist, although the same grade of materials was being used. In this article, we report some testing condition-property relationships of injection molded glass-fiber/polyamide-6 composites. It was found that an increase in specimen size/geometry leads to an increase in fracture energy and peak load; however, critical strain energy release rate and critical stress intensity factor decrease. Increase in impactor velocity, fracture energy, and peak load are all in mixed mode (increase and decrease). Similar to inconsistency obtained in fracture energy, critical strain energy release rate is also in mixed mode. However, critical stress intensity factor is marginally increased. Increases in impactor load weight and fracture energy at all notch to depth ratios are sensibly increased; however, critical strain energy release rate is marginally decreased at lower Vf and sensibly increased at higher fiber loading. With an increase in impactor load weight, changes in peak load are also in mixed mode, whereas critical stress intensity factor is marginally decreased.

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Section: Introductionmentioning

confidence: 99%

Impact properties of injection molded glass fiber/polyamide-6 composites: effect of testing parameters

Hassan

Rafiq

2011

Journal of Reinforced Plastics and Composites

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“…The average force‐displacement curves for each direction are shown in Figure . The displacement was calculated with Equation , where s(t) is the striker displacement, v 0 is the initial impact velocity, and m is the mass of the striker

s ((), t) = \int_{t_{0}}^{t} ([], v_{0} - \frac{1}{m} \int_{t_{0}}^{t} F ((), t)) italicdt

…”

Section: Resultsmentioning

confidence: 99%

Effect of microstructure and crystallographic texture on the toughness anisotropy of API 5L X46 STEEL

Zúñiga

González-Velázquez

Rivas-López

et al. 2018

Fatigue Fract Eng Mat Struct

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The combined effect of microstructure and crystallographic texture on the toughness anisotropy of API 5L X46 steel was studied. The steel exhibited microstructural banding along the 0° direction and near random texture in the material. The mechanical properties were characterized by the use of tensile and impact toughness samples oriented along the rolling direction (0°, 45°, and 90°). For impact toughness, anisotropic behavior was observed, where the 0° oriented samples showed lower impact toughness than the 90° and 45° directions, with differences of 25% and 31%, respectively, while the yield strength (YS) showed the lowest values in the 0° oriented samples. The relative variation coefficient (rrv) indicates significant correlation between microstructure, texture, and toughness anisotropy. It was observed that the banding degree and the amount of {110} and {111} oriented grains are directly related to the degree of anisotropy, which high values are the cause of lower mechanical properties.

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“…This vibration effect is also accentuated in the case of brittle materials tested at low temperatures, when the fracture time is very short, and in some cases, when the sample is improperly positioned on the support base. There is bibliography referring to studies related to the vibration modes on impact test system, and how these vibrations interfere with the load cell signal of the impact striker, which may compromise the load measurements in the tests [65][66][67][68][69].…”

Section: Characteristics Curves Of the Instrumented Charpy Testmentioning

confidence: 99%

“…A very efficient way to reduce oscillations is by adjusting the initial impact velocity (V o ), associated with the initial pendulum height (h o ), [23,65]:…”

Section: Characteristics Curves Of the Instrumented Charpy Testmentioning

confidence: 99%

Use of instrumented charpy testing on the fracture toughness characterization of metallic materials

Pereira¹,

Blas²,

Griza³

et al. 2021

Tecnol. Metal. Mater. Min.

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Influence of some test parameters on specimen loading determination methods in instrumented Charpy impact tests

Cited by 25 publications

References 17 publications

Impact properties of injection molded glass fiber/polyamide-6 composites: effect of testing parameters

Impact properties of injection molded glass fiber/polyamide-6 composites: effect of testing parameters

Effect of microstructure and crystallographic texture on the toughness anisotropy of API 5L X46 STEEL

Use of instrumented charpy testing on the fracture toughness characterization of metallic materials

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