The response of circular plates to repeated uniform blast loads: An experimental and numerical study

As consequence for increasing threats by IEDs (Improvised Explosive Devices) on vehicles, the blast resistance of the welded frames and bodies becomes increasingly important. Considering vehicle welds subjected to blasting, the real configurations of the joints in the structure and the position of the blast loads have to be considered. The present contribution thus focuses on a weld joint at the explosion endangered wheel well of a tactical truck. The high-strength steel welds were subsequently impacted by explosion loads within the upper range from those experienced in practical military operation to cause not only deformation, but also to investigate the ultimate fracture behaviour of the high-strength weld. The interaction between cooling time t 8/5 and displacement, crack path as well as fracture surface was analysed. The analyses of the fracture surfaces revealed ductile overload failure and also the size of the dimples was influenced by the cooling time t 8/5 . As a prominent feature, these investigations showed that the crack path of such high-strength steel welds under blasting is less influenced by the final hardness level in the respective weld microstructures but much more affected by the hardness gradient at the fusion line and inside the Heat Affected Zone (HAZ).

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“…Figure 6 shows [15]. The same effect of work hardening due to explosion was discovered by Henchie et al [16].…”

Section: Displacement After Blast Testingsupporting

confidence: 73%

Blast resistance of high-strength structural steel welds

Falkenreck

Boellinghaus

2016

Weld World

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“…Very good correlation is obtained with regards to midpoint deflection and deformation profiles. The plastic strain obtained numerically shows good qualitative correlation with the experimental Vickers hardness tests [2]. Chen ET.…”

Section: Literature Reviewsupporting

confidence: 53%

Evaluation of explosion loading effects on concrete infrastructures using ABAQUS software

Rahimi

2015

IJET

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One of the most important facilities of a country is Fluid Reservoirs which should be secured against different damage of explosion. Reservoir structural failure after explosion not only could lead to economic losses, but also could cause water shortage and toxic leakage. In this paper a reservoir is modeled in ABAQUS software. The results for displacements and deformations, energy dissipation of various forms and principal stresses are illustrated.

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“…The numerical study using ABAQUS and experimental study using ballistic pendulum were performed on circular steel plates for repeated uniform blast loads and excellent correlation is found for midpoint deflection and deformation profiles 64 . One similar fluid-structure interaction analysis was performed considering a spring-mass system (SDOF elastic structure) subjected to blast impulse generated by shock-tube to study the coupled response with FSI and without FSI 65 .…”

Section: Numerical Modellingmentioning

confidence: 97%

Blast Valve Design and Related Studies : A Review

2016

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The protective structures required for performing critical operations are vulnerable to the blast and shock loads of advanced weapons. A blast valve is an important component of such structures for ventilation during normal conditions and for protection from blast/ shock during explosion. In this paper, various aspects of blast valve design and related studies are briefly reviewed. The concept and effects of blast wave, blast impact, numerical modelling and deformation of circular plate (one of the critical components of blast valve) have been discussed. The merits and demerits of sensing mechanisms viz. remote and direct sensing are discussed. The leakage of blast pressure during finite closing period of the valve (one of the critical problems) and the shock tube as a major experimental facility for testing of blast valves are briefly discussed.Keywords: Blast valve, wave, leakage, closure mechanism, shock tube Figure 1. Schematic of blast closure valve.

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The response of circular plates to repeated uniform blast loads: An experimental and numerical study

Cited by 60 publications

References 32 publications

Blast resistance of high-strength structural steel welds

Blast resistance of high-strength structural steel welds

Evaluation of explosion loading effects on concrete infrastructures using ABAQUS software

Blast Valve Design and Related Studies : A Review

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