Continuum modelling of explosive fracture in oil shale

Grady, D. E.; Kipp, M.E.

doi:10.1016/0148-9062(80)91361-3

Cited by 503 publications

(251 citation statements)

References 10 publications

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“…The fragment size is related to the crack size at coalescence. The observations confirm predictions by Grady and Kipp [15,16], that fragment size reduces with increasing strain rate.…”

Section: Failure Modessupporting

confidence: 89%

Dynamic compressive strength of silicon carbide under uniaxial compression

Sarva

Nemat‐Nasser

2001

Materials Science and Engineering: A

107

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SiC is used in impact related applications, such as integrated armor. This necessitates development of models which describe its dynamic behavior and failure modes. Experimental results, which relate the strain rate to the compressive strength of SiC under uniaxial loading are obtained. Quasi-static tests are performed using a hydraulically driven Instron universal testing machine. Dynamic tests are performed using a modified split Hopkinson pressure bar. A marked increase is observed in the compressive strength at strain rates greater than 10 2 s − 1 . The failure modes are similar in specimens loaded at both low and high strain rates. At the peak stress, the specimens fail by axial splitting. This paper compares the experimental results to those predicted by a simple model of interacting, dynamically growing, wing cracks which coalesce, leading to failure.

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“…The fragment size is related to the crack size at coalescence. The observations confirm predictions by Grady and Kipp [15,16], that fragment size reduces with increasing strain rate.…”

Section: Failure Modessupporting

confidence: 89%

Dynamic compressive strength of silicon carbide under uniaxial compression

Sarva

Nemat‐Nasser

2001

Materials Science and Engineering: A

107

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“…In order to extrapolate the present results for dynamic tensile str9ngth to other strain rates, ~e attempt to generalize our findings in terms of the continuum fracturing model of Grady and Kipp (1980). We estimated the value of the principal fragment size, 1m, for the totally fragmented target porUon of our snmpl"" the time, T m , at which maximum stress is reached in the sample, and the time, Tf' at which tensile failure conditions are satisfied (Table 4).…”

Section: B) Resultsmentioning

confidence: 98%

“…The size and velocity distribution of fragments in the resulting ejecta cloud also depend on these same dynamic strength characteristics of the target (Grady and Kipp, 1980;Melosh, 1983). Morreoveer, the recent dis~overy of lightly shocked meteorites, which apparently represent impact ejecta from the moon's (and posssibly Mars) surface have focused considerable interest on the spall phenomena as it occurs on planetary surfaces (Wasson and Wetherill, 1979;Stoloer et al, 1979;Wood and Ashwal, 1980;Melosh, 1983).…”

Section: Introductionmentioning

confidence: 99%

“…In the present study we have carried out several cratering experirflents in a we,ll-characterized gabbro in the 10 9 to 10 10 erg energy range, and performed measurements of the dynamic tensile strength in the samelaaterial at strain 'rates of 10 5 to 10 6 sec-I. We have applied the dynamic fracture data to the cratering results by employing Melosh's (1983) theory, as well as describing the dist.ribution -of compressive and shear failure fragments using the formulation of Grady and Kipp (1980) (Table T ... ~ Figure 1). …”

Section: Introductionmentioning

confidence: 99%

“…Attempts to generalize the description of fracturing and comminution processes and to obtain predictive capability for practical applications of breakage have been recently summarized by Grady and Kipp, 1980;Shockey et a1., 1979;and Curran at al., 1978.…”

Section: Introductionmentioning

confidence: 99%

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Impact cratering and spall failure of gabbro

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Boslough

1984

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Non-local effects on dynamic damage accumulation in brittle solids

Chen

1999

Int. J. Numer. Anal. Meth. Geomech.

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This paper presents a nonlocal analysis of the dynamic damage accumulation processes in brittle solids. A nonlocal formulation of a microcrack based continuum damage model is developed and implemented into a transient dynamic finite element computer code. The code is then applied to the study of the damage accumulation process ina concrete plate with a central hole and subjected to the action of a step tensile pulse applied at opposite edges of the plate. Several finite element discretizations are used to examine the mesh size effect. Comparisons between calculated results based on local and nonlocal formulations are made and nonlocal effects are discussed...

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Continuum modelling of explosive fracture in oil shale

Cited by 503 publications

References 10 publications

Dynamic compressive strength of silicon carbide under uniaxial compression

Dynamic compressive strength of silicon carbide under uniaxial compression

Impact cratering and spall failure of gabbro

Non-local effects on dynamic damage accumulation in brittle solids

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