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Open Access Article
1 - Investigation of physical issues of the initial conditions of free water surface due to underwater disturbances on the basis of SPH numerical simulation of the phenomenon
Omid Reza Safiyari Mahmood Reza Akbarpour Jannat Babak Banijamali -
Open Access Article
2 - Low and high frequency instabilities in an explosion-generated-plasma and possibility of wave triplet
O. P. Malik Sukhmander Singh Hitendra K. Malik A. Kumar -
Open Access Article
3 - High-frequency instabilities in an explosion-generated relativistic plasma
O. P. Malik Sukhmander Singh Hitendra K. Malik A. Kumar -
Open Access Article
4 - Dispersion modeling of propane leakage from an industry
Farideh Golbabae Nooroddin Avar Iraj MohammadfamAbstract Leakage of toxic، flammable and dangerous materials in process and chemical industries has always been one of the hazardous for working people and residents around these industries and damaging the environment as well. Propane and combustion gas are important MoreAbstract Leakage of toxic، flammable and dangerous materials in process and chemical industries has always been one of the hazardous for working people and residents around these industries and damaging the environment as well. Propane and combustion gas are important hazardous materials in these kinds of industries. because of its special condition of maintenance, environment`s and storage in big tanks for consumption into production units, have chance bring about tens of people death from leakage and explosion of this gas. Although special precautions are considered to prevent release of material and occurring such incidents but releases, explosion and non stochastic incident `s occur mostly because of human errors during the unit control or during repairing. Therefore, the study of incident consequences using risk assessment procedures and atmospheric diffusion models is one of influential method in doing preventive measures. Today to quantitating of risk ( QRA), different software models such as SLAB-DEGADIS-PHAST and ALOHA Have been provided for modeling the release of toxic, flammable and hazardous materials. Each of these software has certain properties appropriate to its own applications. Additionally, By modeling of material release using reliable software, not only the affected area by release of toxic، flammable and hazardous materials could be determined, but emergency response program (proactive, in process and reactive) could also be planned with use conclusion of modeling. This case study is, an industry of Tehran. given input `s element of software according to weather and obtained concentration in 1 Km is17times of TLV and that`s limit of effectiveness explosive ment. because that cause to 916 human personal and 130 passenger are die, also sustain a loss approximate at least 4/010/000/000/000 rial. that explain recommend` s e. g construction and equipped of crisis management station, rescue and resuscitation center, construction of dick, barrier and control of automobile`s, EX proofing of equipment`s near to tank to prevent and control of incident from release Manuscript profile -
Open Access Article
5 - Geometric Optimization of APCs anti Explosion Blades using LS-DYNA Finite Element Software
Jalil Jamali alireza rezaie -
Open Access Article
6 - Analysis of FGM Cylindrical Shell under Impact Loading of Explosion
reza azarafza puya pirali Ali Javadi -
Open Access Article
7 - Design and Analysis of Graded Honeycomb Shock Absorber for Increasing the Safety of Passengers in Armored Vehicles Exposed to Mine Explosion
S. A Galehdari H Khodarahmi A Atrian -
Open Access Article
8 - Investigating the potential of convergence and rock explosion and comparing via the Finite Element numerical Method
Aref Jaberi Fooad Zamanion of the efficacious parameters in sketching elements is evaluating the geology dangers of underground excavations including squeezing and rock explosions in tunnels. the water transmission system was constructed from azad dam to degolan- ghorveh plain in o Moreon of the efficacious parameters in sketching elements is evaluating the geology dangers of underground excavations including squeezing and rock explosions in tunnels. the water transmission system was constructed from azad dam to degolan- ghorveh plain in order to supply water to dehgolan - ghorveh plains. The squeezing and rock e xplosion phenomena were predicted considering the weekness of rock mass of the tunnel track, the overburden thickness and its settlement in the active zone. in the present research, the tunnel was initialy divided in to 5 zones by using the results of geological and borehole drillings. The squeezing and rock explosion in these 5 zones will be discussed later. The tunnel was situated in non squeezing and extreme squeezing zone. Regarding the previous investigations and also the emorical and semi empirical metheds. The tunnel had low potentidity in the view of rock explosion. finally, the Hook and Marinos and critical strain methods were compared via the Finite Element numerical Method using phase2 software. in order to investigate the occured replacement in the tunnel. based on the previous analysis , it was realized that the critical strain method had the most similarities with the numerical method. as for as the results of numerical and critical strain methods are matched, S3 and S5 zone can be the most unstable zones Manuscript profile -
Open Access Article
9 - Experimental and Numerical Investigation of Explosive Wave blasting on the Aluminum Plate
shahram yareiee majid GanjiExplosion is fast chemical reaction that alters primary explosive material to gas. Explosion process include two general part of starting explosion and interaction between environment and explosion products. Study of plate performance and investigation elastic – p MoreExplosion is fast chemical reaction that alters primary explosive material to gas. Explosion process include two general part of starting explosion and interaction between environment and explosion products. Study of plate performance and investigation elastic – plastic behavior and plate rupture is essential to determine relation of those with plate geometric parameter. Shock tube is used for modeling and simulation of loading explosion. In this paper, Experimental and FEM modeling are used to Investigation of Explosive Wave blasting on the Aluminum Plate. Simulation is done by ANSIS Autodyn software. Shock tube was designed and fabricated in order to experimental study. Manuscript profile -
Open Access Article
10 - Assessment of Subsurface Explosion caused by Tunnel Construction in Urban Areas
Hossein Haghighimanesh Mohammad Azadi -
Open Access Article
11 - Investigation of the dynamic response of the subsea transmission pipeline under explosion impact using experimental and numerical methods
Hamid nasiri mohammad asadian ghahferokhi Madjid Ghodsi Hassanabad amin bahmanpourSea and high seas are very important, which can be considered in two aspects. On the one hand, the seas have economic, commercial, logistical, military, and geopolitical advantages, in addition, they pave the way for increased maritime diplomacy. In addition to these ad MoreSea and high seas are very important, which can be considered in two aspects. On the one hand, the seas have economic, commercial, logistical, military, and geopolitical advantages, in addition, they pave the way for increased maritime diplomacy. In addition to these advantages, the harsh natural conditions at sea, such as the presence of high waves, tsunamis, sea ice, as well as ammunition and unused military equipment buried under water left over from the First and Second World Wars, also from the imposed war, which could impose a lot of potential human and financial risks due to explosions. In this paper, using the Abaqus finite element software, the dynamic response of a cylindrical tube buried in the sea subjected to the explosion is investigated applying numerical and experimental methods. Finite element models based on the experimental models were examined and the numerical results were compared with the experimental data. The results indicated that the maximum impact wave pressure, bubble propagation duration and displacement due to the cylinder deformation in the experimental and finite element analysis were well compatible Manuscript profile -
Open Access Article
12 - Numerical Study of the Effect of Sacrificial RC Slab on the Performance of Underground Arc Shaped Structures under the Explosion Load
seyyed safar saleh kutah esmaeil izadi zaman abadiWith the increasing expansion of the technology for the production of high-tech military equipment, the need to build structures with acceptable resistance against explosion in vital centers increasingly felt. These structures as the facilities in times of peace an MoreWith the increasing expansion of the technology for the production of high-tech military equipment, the need to build structures with acceptable resistance against explosion in vital centers increasingly felt. These structures as the facilities in times of peace and in times of war and natural disasters are contributing to saving lives. Due to the lack and limitation of experimental data for explosion problems, numerical modeling based on finite element method can help in designing and estimating the loads exerted on structures. In this research, the effects of sacrificial RC slab on the performance of underground arched shape RC structures with practical details under explosion load were studied. Ls-Dyna finite element software was used to solve the problem and optimized concrete arches under different levels of explosives were investigated. Results show that, if a sacrificial RC slab is placed on the crown of the study structure, no damage will occur in structure and structural damages will be concentrated in RC slab. However these damages will be increased with increasing of the explosives. On the other hand, sacrificial slab distributes the blast waves at a higher level of soil which in turn shield the structure against explosion. Consequently, the safety of the structure in terms of performance against blast loading will be increased significantly. Manuscript profile -
Open Access Article
13 - The Effect of Simultaneous and Multi-Stage Explosions on the Response of Structures Buried in Soil
Saeid Firouzabadi Hadi Dashti Alireza FiouzUnderground structures are the best options to build command posts, shelters, weapons depots, important equipment, and defense industries. The manner in which a loading is caused by launch of airplane bombs on buried underground structures is among major issues on which MoreUnderground structures are the best options to build command posts, shelters, weapons depots, important equipment, and defense industries. The manner in which a loading is caused by launch of airplane bombs on buried underground structures is among major issues on which relatively few studies have been carried out, and may not be considered in design of such structures. The simultaneous and Multi-step explosions of missile launches from aircraft and drones also affect the buried structural response. Therefore, in the present study, after verifying the validity of the numerical model with a real model, a comparative study on the effect of simultaneous and multi-stage bombs on response of secure buried structures in soil was carried out using finite element method. This issue has been investigated in four cases with constant burial depth and different explosion location. The results of maximum stresses presented that, in the case of multiple-stage bombing loads, underground structures under study, in all considered situations, experienced more stress than the simultaneous explosive loading mode. The difference of these changes has been observed in some places up to about 15%. Manuscript profile -
Open Access Article
14 - Numerical investigation of a new structural configuration of a concrete barrier wall under the effect of blast loads
Ahmed K. Taha Zhengguo Gao Dahai Huang M. S. Zahran -
Open Access Article
15 - A novel mathematical model of formulation design of emulsion explosive
Ming Lu Qifa Liu -
Open Access Article
16 - Influence of mechanical alloying and preheating on fabrication of NiTi alloy by combustion synthesis
Ali Reza Sadegi Aval Shahr Hassan Mostajab o daveh Abolfazl Babakhani Mojtaba Zebarjad Akram SalehiIn this study Ni and Ti with 50 at. % Ni powders were milled and the cylindrical performs obtained by uniaxial cold compaction under 150 MPa pressure. Porous Ni/Ti specimens were synthesized by thermal explosion (TE) at different preheating temperatures (350 °C, 400 MoreIn this study Ni and Ti with 50 at. % Ni powders were milled and the cylindrical performs obtained by uniaxial cold compaction under 150 MPa pressure. Porous Ni/Ti specimens were synthesized by thermal explosion (TE) at different preheating temperatures (350 °C, 400 °C, 500 °C and 600 °C) and milling times (0.5, 1 and 2h). The effect of preh­­­eating temperatures and milling times on microstructure of final products were investigated by X-ray diffraction analysis (XRD), optical microscopy and scanning electron microscopy (SEM). NiTi shape memory alloy with other secondary intermetallic compounds and elemental powders were observed in the final products. Results showed the dominant phase was NiTi in the sample that milled for 1h and preheated at 400 °C. Manuscript profile -
Open Access Article
17 - Assessing the vulnerability of Shiekh Bahaei’s bath under the blast wave
Melika Honary Abdollah Vaez Shoushtari Erfan Jaberzadeh -
Open Access Article
18 - Risk analysis of ammonia release in food refrigeration Using FTA technique and fuzzy logic
Leily Asghariazim