Reduced ballistic limit velocity of graphene membranes due to cone wave reflection

Meng, Zhaoxu; Singh, Amit; Qin, Xin; Keten, Sinan

doi:10.1016/j.eml.2017.06.001

Cited by 45 publications

(35 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In region II, deformation propagation phenomena, like cone wave formation and interference in graphitic barriers, can be important drivers for overall impact resistance. 53,55 With still greater initial velocities (region III), V r linearly depends on V 0 , with lms experiencing immediate, local perforation and ber fragmentation at the impact site.…”

Section: Resultsmentioning

confidence: 99%

“…51 With the advent of small-scale ballistic experiments, such as laser-induced projectile impact tests (LIPIT), 52,53 MD simulations have successfully been used to explain the failure mechanisms of nanomaterials subjected to ballistic impacts. MD simulations have also quantied the dependence of ballistic properties on specimen dimensions and projectile geometries, [54][55][56] complementing experimental studies at the microscopic scales. 53 In particular, they have elucidated mechanisms associated with cone wave reections and spalling effects in graphene membranes.…”

Section: Introductionmentioning

confidence: 90%

“…Other lm sizes were also tested and no qualitative differences in the deformation mechanisms were found in lms with larger radii, although geometric effects should play a role when the span to projectile radius ratio becomes sufficiently small. 55 In addition, the ratio between projectile radius and lm thickness is relatively small compared to standard thin lm LIPIT. 53,62,63 The small ratio in this work was purposely chosen to investigate and highlight the frictional effects in the thickness direction on the impact response of lms, similar to a previous experimental study on high strain rate deformation of layered nanocomposites using LIPIT.…”

Section: Methodsmentioning

confidence: 99%

“…53 In particular, they have elucidated mechanisms associated with cone wave reections and spalling effects in graphene membranes. [55][56][57]…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Impact resistance of nanocellulose films with bioinspired Bouligand microstructures

et al. 2019

Self Cite

View full text Add to dashboard Cite

The Bouligand structure features a helicoidal (twisted plywood) layup of fibers that are uniaxially arranged in-plane and is a hallmark of biomaterials that exhibit outstanding impact resistance. Despite its performance advantage, the underlying mechanisms for its outstanding impact resistance remain poorly understood, posing challenges for optimizing the design and development of bio-inspired materials with Bouligand microstructures. Interestingly, many bio-sourced nanomaterials, such as cellulose nanocrystals (CNCs), readily self-assemble into helicoidal thin films with inter-layer (pitch) angles tunable via solvent processing. Taking CNC films as a model Bouligand system, we present atomisticallyinformed coarse-grained molecular dynamics simulations to measure the ballistic performance of thin films with helicoidally assembled nanocrystals by subjecting them to loading similar to laser-induced projectile impact tests. The effect of pitch angle on the impact performance of CNC films was quantified in the context of their specific ballistic limit velocity and energy absorption. Bouligand structures with low pitch angles (18-42 ) were found to display the highest ballistic resistance, significantly outperforming other pitch angle and quasi-isotropic baseline structures. Improved energy dissipation through greater interfacial sliding, larger in-plane crack openings, and through-thickness twisting cracks resulted in improved impact performance of optimal pitch angle Bouligand CNC films. Intriguingly, decreasing interfacial interactions enhanced the impact performance by readily admitting dissipative inter-fibril and inter-layer sliding events without severe fibril fragmentation. This work helps reveal structural and chemical factors that govern the optimal mechanical design of Bouligand microstructures made from high aspect ratio nanocrystals, paving the way for sustainable, impact resistant, and multifunctional films.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 90%

Section: Methodsmentioning

confidence: 99%

“…53 In particular, they have elucidated mechanisms associated with cone wave reections and spalling effects in graphene membranes. [55][56][57]…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Impact resistance of nanocellulose films with bioinspired Bouligand microstructures

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…Moreover, they have investigated the particular projectile size effect because of the reflection of the cone wave. The critical size relationship provides guidelines for the future microscale ballistic testing using 2D nanomaterials [ 27 ].…”

Section: Dynamic Mechanical Behaviours Of Multilayer Graphene Sheetsmentioning

confidence: 99%

Advancement in Graphene-Based Materials and Their Nacre Inspired Composites for Armour Applications—A Review

et al. 2021

View full text Add to dashboard Cite

The development of armour systems with higher ballistic resistance and light weight has gained considerable attention as an increasing number of countries are recognising the need to build up advanced self-defence system to deter potential military conflicts and threats. Graphene is a two dimensional one-atom thick nanomaterial which possesses excellent tensile strength (130 GPa) and specific penetration energy (10 times higher than steel). It is also lightweight, tough and stiff and is expected to replace the current aramid fibre-based polymer composites. Currently, insights derived from the study of the nacre (natural armour system) are finding applications on the development of artificial nacre structures using graphene-based materials that can achieve high toughness and energy dissipation. The aim of this review is to discuss the potential of graphene-based nanomaterials with regard to the penetration energy, toughness and ballistic limit for personal body armour applications. This review addresses the cutting-edge research in the ballistic performance of graphene-based materials through theoretical, experimentation as well as simulations. The influence of fabrication techniques and interfacial interactions of graphene-based bioinspired polymer composites for ballistic application are also discussed. This review also covers the artificial nacre which is shown to exhibit superior mechanical and toughness behaviours.

show abstract

Experimental Analysis of High Velocity Impact Properties of Composite Materials for Ballistic Applications

Nayak

Samant

Shenoy

et al. 2021

Impact Studies of Composite Materials

View full text Add to dashboard Cite

Reduced ballistic limit velocity of graphene membranes due to cone wave reflection

Cited by 45 publications

References 29 publications

Impact resistance of nanocellulose films with bioinspired Bouligand microstructures

Impact resistance of nanocellulose films with bioinspired Bouligand microstructures

Advancement in Graphene-Based Materials and Their Nacre Inspired Composites for Armour Applications—A Review

Experimental Analysis of High Velocity Impact Properties of Composite Materials for Ballistic Applications

Contact Info

Product

Resources

About