Experimental and numerical estimation of strength and fragmentation of different porosity alumina ceramics

Сапожников, С. Б.; Kudryavtsev, O. A.; Dolganina, N.Yu.

doi:10.1016/j.matdes.2015.08.117

Cited by 14 publications

(7 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The determination of mechanical properties of individual components of prepared composites is important for the evaluation of composites behaviour as well as structural parameters as mentioned above. Therefore the pure PUR matrices without GR were prepared in the 20 20-80 20-90 20-90 P 85 -G 5 -CO 10 20-90 20-90 20-90 P 65 -C 35 20-90 20-90 20-90 P 49 -CO 26 -LO 25 20-90 20-90 20-90 P 33 -CO 17 first phase whereas their composition was designed in order to achieve different mechanical properties and different bulk porosity. Values of mechanical properties, porosity and density of PUR matrices are listed in Table 3.…”

Section: General Relationship Between Structure Parameters and Mechanmentioning

confidence: 99%

“…wood, concrete, mineral castings). Recently, many researchers have attempted to examine the effect of porosity on material behavior, especially for one-component materials such as ceramics [1][2][3][4][5][6][7][8][9][10][11], natural materials [12], sintered metals [1,9,[13][14][15] and polymers [1,16]. The main effort has been developed in the field of mechanical properties mostly represented by elastic modulus and strength.…”

Section: Introductionmentioning

confidence: 99%

“…The main effort has been developed in the field of mechanical properties mostly represented by elastic modulus and strength. A lot of published relationships between porosity and mechanical properties have been proposed for one-component materials in the form of linear [1-3, 6-8, 12, 15], exponential [1,2,7,8,10], power [1, 2, 5, 7-9, 11, 13, 14, 16-18] and logarithmic functions [15]. The effect of porosity in one-component polymeric materials is well examined issue.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A new approach to the structure–properties relationship evaluation for porous polymer composites

et al. 2020

View full text Add to dashboard Cite

In proposed study the effect of the composition and structure of polyurethane/ground rubber (PUR/GR) composites on the mechanical behavior was evaluated. The structure-properties relationship was studied for PUR matrices with different polarity, porosity and mechanical properties. The morphology of PUR/GR composites was expressed by two structural parameters-interspace filling and interspace volume. Experimental data of mechanical testing were fitted by powerlaw functions containing mentioned structural parameters whereas exponents of these parameters reflect differences in mechanical properties and chemical composition of PUR matrices. Obtained equations describe the mechanical behavior with respect to the structure and morphology of porous PUR/GR composites consisting of one filler and different PUR matrices. Proposed study suggests new approach to the description of the relationship between mechanical behavior and structure of porous composite materials.

show abstract

Section: General Relationship Between Structure Parameters and Mechanmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A new approach to the structure–properties relationship evaluation for porous polymer composites

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The ballistic tests were performed using the 6.35 mm of diameter tempered steel ball accelerated (with LDPE small sabot) up to 900 m/s by the energy of standard civil dowel cartridge on special lab-scale stand (Sapozhnikov et al [11], Figure 1). Initial bullet velocity V i was measured by the optical chronograph and residual velocity V r (after penetration of target) was measured by special frictional trap.…”

Section: Modelling Materialsmentioning

confidence: 99%

Effective FEA design of hard face composite structures to stop armor piercing projectiles

Forental¹,

Сапожников²

2016

WIT Transactions on the Built Environment

View full text Add to dashboard Cite

Traditional ceramic/composite personal protective structures now are monolithic. In this case, the ceramic part is designed to shatter the high hardness core of the projectile into fragments and the role of the composite part is full dissipation of the residual energy of these fragments. In order to stop a 7.62 calibre armor piercing projectile (B-32), the current design of an alumina/aramid fibre reinforced plastic structure consists of 10 mm of alumina and 10 mm of composite backing, so the areal density is about 50 kg/m 2. In this work, we designed ceramics/sandwich composite protective structures, which have less weight and cost than traditional ones. To make the FEA optimization procedure of the new structure faster we developed novel low-parametric failure models of ceramics and FRPs. For alumina ceramic we proposed pseudo-brittle (with plasticity only at compression, strain rate insensitive tension strength) failure model. The failure model of a layered composite has two mechanisms: brittle fibre's breakage and delamination (breakable layer's contacts). We used ANSYS/AUTODYN-3D explicit code with a 'death of elements' approach and the remaining eroded element's inertia.

show abstract

“…conducted Split‐Hopkinson pressure bar (SHPB) experiments and finite element numerical simulations on alumina ceramic materials and found that the strain rate effects were significant. In other studies, 18–23 the dynamic responses of brittle materials, such as ceramics, under various loading conditions have been examined, and the failure processes of these materials were analyzed. Feng et al 24 .…”

Section: Introductionmentioning

confidence: 99%

Rapid geometric characterization of ceramics fragments through split Hopkinson pressure bar tests

Li,

Zhao,

Meng

2024

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

The research on fracture mechanisms of brittle materials is extremely difficult such as the determination of the energy absorption modes and the geometric characteristics of debris. In this paper, a dynamic experimental fragment recovery device was developed to study the facture characteristics of A99 ceramics (the mass of Al2O3 accounts for 99%) based on the Split‐Hopkinson pressure bar (SHPB) experiments, in which the energy absorption mechanism was revealed. A three‐view characterization method was developed to obtain the geometric characterization formula under various strain rate; therefore, the geometric parameters of the fragments can be quickly characterized. The failure mode was investigated in correlation between strain rate and micro‐cracks. It was found that the shape of the strain rate controlled the proportion of dissipated energy. At a lower strain rate the fragment was prone to needle shape, while at a higher strain rate (above 2001 s−1) the proportion of dissipated energy increased to 72% and the fragment shape tended to be nearly spherical. A formula based on strain rate was proposed to characterize the geometric parameters of the fragments without the need of geometry dimensions; therefore, the fragment rate can be quickly obtained, which could provide guidance for the design of ceramics parts.

show abstract

Experimental and numerical estimation of strength and fragmentation of different porosity alumina ceramics

Cited by 14 publications

References 28 publications

A new approach to the structure–properties relationship evaluation for porous polymer composites

A new approach to the structure–properties relationship evaluation for porous polymer composites

Effective FEA design of hard face composite structures to stop armor piercing projectiles

Rapid geometric characterization of ceramics fragments through split Hopkinson pressure bar tests

Contact Info

Product

Resources

About