Experimental Methods for Characterization and Evaluation of Transparent Armor Materials

Straßburger, E.; Hunzinger, M.; McCauley, James W.; Patel, Parimal

doi:10.1002/9780470944004.ch16

Cited by 11 publications

(16 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We measured 1.92 ± 0.03 km/s. Strassburger et al . used the edge‐on‐impact experimental technique on various transparent materials, and they report a crack velocity of 2.03 km/s for Borofloat 33, which is within 6% of the value measured here.…”

Section: Crack Velocitysupporting

confidence: 79%

“…These experiments were first developed by Senf et al . and then further work has been performed by Strassburger et al . In the EOI experiments, Cranz–Schardin high‐speed cameras are used to visualize dynamic fracture during approximately the first 20 μs after impact.…”

Section: Introductionmentioning

confidence: 99%

“…Several studies, however, have focused on damage in transparent materials; in particular, edge-on-impact (EOI) experiments to investigate fracture/failure of brittle materials. These experiments were first developed by Senf et al 18,19 and then further work has been performed by Strassburger et al [20][21][22][23][24] In the EOI experiments, Cranz-Schardin high-speed cameras are used to visualize dynamic fracture during approximately the first 20 ls after impact. The projectile (either flat-nosed or a hemispherical nose) impacted the edge of the target for the EOI experiments and the camera recorded damage as it propagated away from the impact point.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Crack and Damage Velocities in Ballistic Experiments

Anderson

Bigger

Weiss

2014

Int J of Appl Glass Sci

View full text Add to dashboard Cite

A series of ballistic impact experiments were conducted against a borosilicate glass (Borofloat®33) bonded to a polycarbonate substrate. Two of the objectives of the experiments were to measure crack velocities in the glass, and to measure the damage velocity in the glass. The speed of distinct propagating cracks was found to be 1.92 ± 0.03 km/s, independent of impact velocity. The maximum rate of damage propagation was found to be a function of impact velocity, but the damage velocity plateaued at 2.07 ± 0.04 km/s.

show abstract

Section: Crack Velocitysupporting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Crack and Damage Velocities in Ballistic Experiments

Anderson

Bigger

Weiss

2014

Int J of Appl Glass Sci

View full text Add to dashboard Cite

show abstract

“…Terminal crack velocities are of importance in some applications such as ballistic impact testing . The 1st and 2nd editions of my Guide to Fractography of Ceramics and Glasses cover the topic to some degree, but the next edition will expand on the topic.…”

Section: Introduction and Reviewmentioning

confidence: 99%

On terminal crack velocities in glasses

Quinn

2018

Int J of Appl Glass Sci

View full text Add to dashboard Cite

A review of the literature shows that terminal crack velocity, vct, should be correlated with the longitudinal elastic wave velocity, and the structure and density of glasses. Theoretical predictions of vct by the Mott‐Roberts‐Wells model match experimental measurements for some key glasses, including fused silica and low‐density borosilicates. It is suggested that the slower vct results obtained for many other glasses are due to structural variations that cause crack front perturbations. The conclusions of this paper are most likely applicable to ceramics as well.

show abstract

“…To this end, the experimental examination of dynamic fracture modes, damage front velocities, and associated deformation mechanisms is crucial for material development and computational models. Studies on the impact and penetration response of transparent materials have been conducted by numerous researchers . However, there are limited studies on the high velocity impact behavior of strengthened glasses .…”

Section: Introductionmentioning

confidence: 99%

Ball Impact Response of Unstrengthened and Chemically Strengthened Glass Bars

Jannotti

Subhash

Varshneya³

2013

J. Am. Ceram. Soc.

View full text Add to dashboard Cite

Ball impact experiments were conducted at impact velocities of 52–345 m/s on unstrengthened and chemically strengthened lithium aluminosilicate glass bars to assess the damage propagation characteristics. The damage was captured by high‐speed imaging at frame rates up to 500 000 frames per second (fps). Upon impact, the damage front in the unstrengthened glass reached a maximum velocity of 1626–2135 m/s, and rapidly fell to zero within a short distance. On the contrary, the damage front in the strengthened glass reached an initial velocity of 1791–2275 m/s, but then stabilized to a constant velocity of 1920 m/s until the entire glass bar was consumed. In addition, the cascading release of stored energy due to strengthening led to self‐sustained damage propagation preferentially within the outer layers of the glass bar (predominantly within the compressive zones) at a higher rate than in the interior region (dominated by residual tension). This is counter to what has been traditionally reported in the literature. Stress wave reflection from the rear of the unstrengthened bar caused tensile cracking (i.e., spallation), but the ultrahigh residual compression in the strengthened bar prevented similar damage initiation. Finally, it is suggested that strengthened glasses are most suitable as intermediate layers in laminate window panels for impact applications.

show abstract

Experimental Methods for Characterization and Evaluation of Transparent Armor Materials

Cited by 11 publications

References 8 publications

Crack and Damage Velocities in Ballistic Experiments

Crack and Damage Velocities in Ballistic Experiments

On terminal crack velocities in glasses

Ball Impact Response of Unstrengthened and Chemically Strengthened Glass Bars

Contact Info

Product

Resources

About