Development of Brick and Mortar Material Parameters for Numerical Simulations

Meyer, Christopher S.

doi:10.1007/978-1-4614-0216-9_49

Cited by 5 publications

(4 citation statements)

References 8 publications

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“…As mentioned earlier, the modeling approach has been validated in prior work [20,21]. Most similar numerical work uses the Hanchak et al [3] residual velocity data for validation (cf.…”

Section: Methodsmentioning

confidence: 97%

“…The HJC model also uses a linked equation of state to compute pressure from volumetric compression. See also prior related work by the author for additional discussion on the HJC model [20,21]. Concrete material parameters were derived from mechanical characterization data for SAM-35 concrete [25] and for RTC concrete [26] provided by the U.S. Army Corps of Engineers, Engineer Research and Development Center, Geotechnical and Structures Laboratory.…”

Section: Modeling Approachmentioning

confidence: 99%

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Kinetic Energy Required for Perforating Double Reinforced Concrete Targets: A Parametric Numerical Study Considering Impact Velocity and Penetrator Presented Area

Meyer

2015

Procedia Engineering

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The U. S. Army's interest in breaching double-reinforced concrete (DRC) walls has revealed a need to better understand the energy required to perforate DRC. In an effort to determine the minimum kinetic energy required for perforating a DRC target, a parametric numerical study was conducted at the U. S. Army Research Laboratory. As an initial step in the exploration of minimum kinetic energy required for perforating DRC targets, large scale, high-fidelity, three-dimensional numerical simulations were conducted using an Eulerian shock physics code and an empirical concrete constitutive model. The parametric study investigated right cylindrical steel rods with masses of 500-2000 g and length-to-diameter ratios (L/D) of 1-10 impacting with velocities ranging from 500-2000 m/s, and perforating rebar reinforced concrete targets at three different impact locations with impact orientations to target of either end-on or side-on. This paper describes the modeling methodology used to generate the data, and then uses this data to consider the kinetic energy of perforation of DRC for the described range of conditions. Finally, an empirical fit to the data is reported, which may be used to estimate the conditions necessary for perforation of a DRC target of given parameters. Nomenclature v 0 initial velocity of projectile (m/s) v r residual velocity of projectile (m/s) ρ P projectile density (kg/m 3 ) ρ T target density (kg/m 3 ) C T speed of sound in target (km/s) A empirical parameter (m/s) B empirical parameter d projectile diameter (m) l projectile length (m) m projectile mass (kg) * Chrisopher S. Meyer. 382 Christopher S. Meyer / Procedia Engineering 103 ( 2015 ) 381 -388 h target thickness (m) L/D length-to-diameter ratio of projectile

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“…As mentioned earlier, the modeling approach has been validated in prior work [20,21]. Most similar numerical work uses the Hanchak et al [3] residual velocity data for validation (cf.…”

Section: Methodsmentioning

confidence: 97%

Section: Modeling Approachmentioning

confidence: 99%

Kinetic Energy Required for Perforating Double Reinforced Concrete Targets: A Parametric Numerical Study Considering Impact Velocity and Penetrator Presented Area

Meyer

2015

Procedia Engineering

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“…Wei, et.al., [20] studied numerically the blast response of unreinforced masonry brick-wall using strain-rate material models for both brick and mortar with good agreement with experiments. In recent past, [21] successfully attempted to develop the strength, damage and pressure behavior of brick and mortar for Holmquist-Johnson-Cook (HJC) model. Zhou, et.al., [7] proposed a dynamic continuum damage material model for both brick and mortar with their respective material properties and successfully implemented it in ASYS/Autodyn through user-subroutine.…”

Section: Plain Concrete Targetmentioning

confidence: 99%

Numerical Studies of Penetration in Light Armor, Concrete and Brick-Wall Targets

Zakir

Suo

et al. 2018

Matéria (Rio J.)

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The accurate numerical simulation of projectile penetration process is a complex challenge. Experimental investigation of these time-dependent non-linear events is expensive and time-consuming. In this paper, 3-D numerical simulations are carried out to estimate the penetration performance of designed penetrators against the double and triple brick-wall, plain concrete wall and light armor targets at impact velocities of 120 to 300 m/s, undergoing normal and oblique impacts. In all simulations, both the projectile and targets are modeled using Lagrange solver facility, available in ANSYS/Autodyn. During penetration process, targets experience severe grid deformation in the region local to the penetrator. Highly distorted elements are removed from the calculation using erosion strain algorithm. The simulation results suggest that at maximum velocity flat-nose (FN) projectile successfully perforate all the targets with significant residual velocity, for both normal and maximum oblique impact scenarios. For impact velocity of 120 m/s, the FN projectile perforated the armor and concrete targets but was not able to penetrate and cross through these targets. However, both brick-wall targets were perforated at normal and maximum oblique angle with sufficient residual velocity. The validation of the calculated results and numerical setup were made with experiments against double and triple brick-wall targets for impacting velocity of 170 m/s. Good agreement between the experimental and estimated projectile residual velocity has been achieved. In contrast to FN projectile, the ogive-nose penetrator calculated results has shown ricocheting behavior on impacting the light armor target at minimum velocity and maximum obliquity. The FN projectile has shown better perforation and penetration performance against light armor and domestic targets. The projectile minimum velocity is also estimated numerically to fully penetrate three different types of targets. These results would be beneficial for the designers and operators to get the desired performance against domestic and light armor targets with sureness.

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“…Shadlou et al [16] presented a brief discussion about the main challenges on modelling the reinforced concrete frames, masonry infills, and interaction between them for structures located in seismic zones. Some scholars [17][18][19][20] used brick masonry discrete model to explore the details of damage development process of the masonry and the damage phenomenon at the interface between the brick and the mortar. However, this method would consume lots of central processing unit (CPU) and memory resources of computer during calculations [21].…”

Section: Introductionmentioning

confidence: 99%

Research on Damage Characteristics of Brick Masonry under Explosion Load

Wei

Zheng

et al. 2021

Shock and Vibration

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As the main structural component of partition wall or load-bearing wall, brick masonry has been widely used in construction engineering. However, brick and mortar are all brittle materials prone to crack. Nowadays, fireworks, gas stoves, high-pressure vessels, and other military explosives may explode to damage nearby structures. Many explosion casualties had shown that the load-bearing capacity of brick masonry decreased dramatically and cracks or fragments appeared. Previous studies mainly focused on noncontact explosion in which shock wave is the main damage element. In fact, the response and damage effect of brick masonry wall under contact explosion are more complex, which attracts more attention now. In order to explore the damage characteristics of brick masonry under explosion load, a series of simulations and verification experiments are conducted. RHT and MO granular material models are introduced to describe the behaviour of brick and masonry, respectively, in simulation. The combination effect of front compressive wave and back tensile wave are main factors influencing the breakage of masonry wall. The experimental results are well in accordance with the simulation results. The front cross section dimension of crater is closely related to the radius of spherical explosive charge. A power function predictive model is developed to express the relationship between the radius of hole and the radius of explosive. Furthermore, with increasing the quantity of explosive charge, the number and ejection velocity of fragments are all increased. The relationship between maximum ejection velocity and the quantity of explosive also can be expressed as a power function model.

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Development of Brick and Mortar Material Parameters for Numerical Simulations

Cited by 5 publications

References 8 publications

Kinetic Energy Required for Perforating Double Reinforced Concrete Targets: A Parametric Numerical Study Considering Impact Velocity and Penetrator Presented Area

Kinetic Energy Required for Perforating Double Reinforced Concrete Targets: A Parametric Numerical Study Considering Impact Velocity and Penetrator Presented Area

Numerical Studies of Penetration in Light Armor, Concrete and Brick-Wall Targets

Research on Damage Characteristics of Brick Masonry under Explosion Load

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