Effect of impact angle and velocity on the fragment size distribution of glass spheres

Cheong, Y.S.; Salman, Agba D.; Hounslow, Michael J.

doi:10.1016/j.powtec.2003.09.010

Cited by 32 publications

(20 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Impact testing has been widely used to investigate the breakage behaviour of different materials such as polymethylmethacrylate [16,17], lactose [18], glass [19], sand [20], concrete balls [21,22], aluminium oxide particles [23], agglomerates of glass beads [24], detergents [25] and enzyme granules [26].…”

Section: Methodology and Materialsmentioning

confidence: 99%

Impact strength distribution of placebo enzyme granules

et al. 2015

View full text Add to dashboard Cite

Enzyme granules are used in laundry detergent formulations to improve washing quality at lower temperatures than commonly used with traditional formulations. However, any dust generated from their handling in manufacturing plants poses a health risk to operators. Therefore, current enzyme granule manufacturing produces strong granules that resist plant stresses and hence do not easily break. There are however indications that a very small number of granules are substantially weaker than the rest. This would have implications on the Coefficient of Variations (CV) of enzyme dust analysis. It is highly desirable to have a low value of Coefficient of Variation (CV) of enzyme dust to ensure confidence in the test results. The CV is largely influenced by the testing rig performance, but its minimum value is limited by the material characteristics. This work sets out to evaluate the minimum CV that is possible to get for the sample mass tested, by quantifying the number of outliers by impact testing using placebo granules. The outcome is a methodology for specifying the minimum possible CV that can be obtained from a given test material.

show abstract

Section: Methodology and Materialsmentioning

confidence: 99%

Impact strength distribution of placebo enzyme granules

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Cheong et al (2004) fitted experimental data to the two-parameter Weibull equation, for various velocity and impact angles. In all cases, the coefficients of determination were calculated to be greater than 0.98 (Cheong et al, 2003). Fundamental parameters contributing to post-fragmentation size distributions are impact velocity, impact angle, shape, scale, and material.…”

Section: Fragment Size Distributionmentioning

confidence: 99%

“…The critical normal impact velocity, v l , is the minimum required velocity to observe physical damage or failure. It is estimated with a static compression test, and is a function of material properties and failure loads (Cheong et al, 2003;Maxim et al, 2006). A second threshold velocity, v u , can be identified above which solids disintegrate into fine powder (Gorham and Salman, 2005;Salman et al, 2002).…”

Section: Impact Velocity and Anglementioning

confidence: 99%

“…Experiments on spherical samples have shown that under normal impact cracks propagate and divide the sphere symmetrically, while oblique impact results in the formation of unsymmetrical fracture about the impact axis (Cheong et al, 2003). In oblique impact, the normal component of impact velocity is responsible for rupture, while the tangential one only affects the symmetry condition of fragmentation (Gorham and Salman, 2005;Maxim et al, 2006;Salman et al, 2004).…”

Section: Impact Velocity and Anglementioning

confidence: 99%

“…The two main impact loading experiments reported in the literature are the drop-shatter and the double impact tests (Table 1). The drop-shatter test consists in impacting spherical solids on a target with different velocities (Cheong et al, 2003;Salman et al, 2004), whereas the double-impact test is the dynamic counterpart of the static diametral compression of spheres between two rigid platens (Chau et al, 2000;Wu et al, 2004). Experiments using non-spherical solids include the fragmentation of cubes (Giacomini et al, 2009), cylinders (Shockey et al, 1974), slabs (Grange et al, 2008), and beams (Riou et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A direct fragmentation method with Weibull function distribution of sizes based on finite- and discrete element simulations

Paluszny

Tang

Nejati

et al. 2016

International Journal of Solids and Structures

View full text Add to dashboard Cite

A direct method is proposed to rapidly fragment bodies during impulse-based discrete element method simulations of multiple body interactions. The approach makes use of patterns and size distributions obtained both from experiments, and from numerical models that rigorously compute fragmentation by growing fractures explicitly. Weibull parameters approximate the fragment size distributions as a function of body size and relative contact velocity. Structured domain decomposition is applied on the colliding bodies directly, resulting in a low-cost fragmentation calculation that depends on relative velocity, but which does not require the computation of fracture growth nor explicit element de-bonding, but instead classifies pre-existing mesh elements into the newly fragmented sub-domains. The method is applied to the fragmentation of a single spherical rock fragment, to an irregularly shaped rock fragment, and to the crushing of an array of spherical rock fragments.

show abstract

Particles in Diametral Compression

2023

Particle Strengths

View full text Add to dashboard Cite

Effect of impact angle and velocity on the fragment size distribution of glass spheres

Cited by 32 publications

References 16 publications

Impact strength distribution of placebo enzyme granules

Impact strength distribution of placebo enzyme granules

A direct fragmentation method with Weibull function distribution of sizes based on finite- and discrete element simulations

Particles in Diametral Compression

Contact Info

Product

Resources

About