Explanipedia

Rapid Evaluation of the Destructive Power Caused by Accidental Explosion of Space Launch Vehicles Open

Liangliang Ding, Xiaoxiao Cui, Liancheng Lu, Xufeng Yin, Xiaoguang Xue , et al. · 2024

Space launch vehicles are usually loaded with a large amount of propellant, and the destructive power caused by their explosion is significant. The altitude of an accidental explosion will lead to differences in the destructive power, beca…

Influence of carbide tooth grinding parameters on shaping efficiency of high steel grade tubing Open

Geng Tang, Qiang Liu, Xue Li, Liangliang Ding, Lin Zhang , et al. · 2024

Complex oil and gas well service conditions very easily trigger downhole casing deformation and failure, resulting in most of the oil and gas field casing shaping and repairing the difficulty of rising, casing micro-plasticity and micro-ex…

Research on the Penetration Characteristics of PELE Projectile with Reactive Inner Core Open

Jingyuan Zhou, Xianwen Ran, Wenhui Tang, Kun Zhang, Haifu Wang , et al. · 2023

With the improvement of protection technology, the damage power of conventional penetrators has become increasingly inferior. Reactive material is a new type of energetic material, which has strong energy release capabilities under high-ve…

Resection of the presacral cyst through the perineal arc incision Open

Liangliang Ding, Zhi Zhang, Cong Wang, Gangcheng Wang · 2022

Research on the Constitutive Model of PTFE/Al/Si Reactive Material Open

Liangliang Ding, Xiaoxiao Cui, Wenhui Tang, Xue Zhong, Yuli Zhao , et al. · 2022

As a new type of energetic material, reactive materials are widely used at present; in particular, the metal/polymer mixtures type reactive materials show great advantages in engineering applications. This type of reactive material has goo…

Analysis of Factors Affecting Sealing Performance of Subsea Wellhead Connector Open

Liangliang Ding, Miao Xian · 2022

Subsea wellhead connector is the key equipment for offshore oil and gas production. The working water depth is generally more than 500 m, so it has higher requirements for its sealing performance. In this paper, the VX gasket matched with …

The study on erosion of buckling tubing string in HTHP ultra-deep wells considering fluid–solid coupling Open

Jiangwen Xu, Yisheng Mou, Chengwen Xue, Liangliang Ding, Ruyan Wang , et al. · 2021

As the first barrier of wellbore integrity, tubing string is an important guarantee for safety production. However, with the rapid consumption of oil and gas, the mechanical environment in wellbore is becoming more and more harsh, which po…

Review for "Pioglitazone and bariatric surgery are the most effective treatments for non‐alcoholic steato‐hepatitis: a hierarchical network meta‐analysis" Open

Liangliang Ding · 2020

Prediction of casing wear depth and residual strength in highly-deviated wells based on modeling and simulation Open

Liangliang Ding, Miao Xian, Qiang Zhang · 2020

Casing wear is a serious problem in highly-deviated wells because serious wear will lead to casing deformation, drilling tool sticking and failure of subsequent operations. The purpose of this paper is to predict casing wear depth and eval…

Theoretical Model of Radial Scattering Velocity of Fragments of the Reactive Core PELE Projectile Open

Liangliang Ding, Jingyuan Zhou, Xianwen Ran, Wenhui Tang, Xiaoguang Xue , et al. · 2020

PELE projectile is a new type of armor-piercing warhead and has a more obvious fragmentation effect, which solves the problem of insufficient after-effects of conventional armor-piercing projectiles. Reactive material is a new type of ener…

Transient prediction of annular pressure between packers in high-pressure low-permeability wells during high-rate, staged acid jobs Open

Liangliang Ding, Rao Ji-yang, Chengyu Xia · 2020

For high-pressure low-permeability wells, wellbore temperature drops drastically in high-rate and multistage acid fracturing process. Under the combined action of the swelling of tubing string and the contraction of annular fluid between p…

Experimental Study of Mechanical Properties and Impact-Induced Reaction Characteristics of PTFE/Al/CuO Reactive Materials Open

Jingyuan Zhou, Liangliang Ding, Wenhui Tang, Xianwen Ran · 2019

Metal/fluoropolymer materials are typical reactive materials. Polytetrafluoroethylene (PTFE)/Al/CuO reactive materials were studied in this research. Scanning electron microscopy (SEM), quasi-static compression, the Split Hopkinson pressur…

Research on the Energy Release Characteristics of Six Kinds of Reactive Materials Open

Xianwen Ran, Liangliang Ding, Jingyuan Zhou, Wenhui Tang · 2019

Currently, PTFE/Al is widely used in the reactive fragmentation warhead. However, for the same explosive yield, the reactive fragments usually have a smaller damage-radius than the inert fragments because PTFE/Al has a poor penetration abi…

Damage Characteristics Analysis of the Truncated Cone-Shaped PELE Projectile Open

Liangliang Ding, Jingyuan Zhou, Wenhui Tang, Xianwen Ran · 2019

The PELE (penetrator with enhanced lateral efficiency) projectile is a new type of penetrator, which has both penetration and fragmentation effects. The damage characteristics of the PELE projectile have never been studied from the perspec…

Theoretical Model of the Axial Residual Velocity of PELE Projectiles Penetrating Thin Metal Targets Open

Liangliang Ding, Wenhui Tang, Xianwen Ran, Zijian Fan, Weike Chen · 2019

With the increase of battlefield target diversity and protection mobility, the disadvantages of traditional armor piercing warheads have gradually become prominent. The conception of the PELE (penetration with enhanced lateral efficiency) …

Impact Energy Release Characteristics of PTFE/Al/CuO Reactive Materials Measured by a New Energy Release Testing Device Open

Liangliang Ding, Jingyuan Zhou, Wenhui Tang, Xianwen Ran, Yuxuan Hu · 2019

Metal/polymer reactive materials have been studied and applied in a wide range of ways in recent years. This type of material is insensitive under normal conditions but reacts violently and releases a large amount of chemical energy under …

FURTHER IMPROVEMENT OF FINITE-TIME CONSENSUS PROTOCOLS FOR DETAIL-BALANCED NETWORKS Open

Cheng Ye, Ke Shi, Wenfei Zhao, Liangliang Ding · 2019

This paper presents a new class of protocols to solve finite-time consensus for multi-agent systems. The protocols are induced from the classical finite-time consensus algorithm by using the so-called protocol function. Sufficient conditio…

Damage Characteristics of PELE Projectile with Gradient Density Inner Core Material Open

Liangliang Ding, Jingyuan Zhou, Wenhui Tang, Xianwen Ran, Cheng Ye · 2018

The PELE (penetration with enhanced lateral efficiency) projectile is a new type of safe ammunition which can form a large number of fragments after perforating the target, and does not depend on any pyrotechnics. The damage characteristic…

Research on the Crushing Process of PELE Casing Material Based on the Crack-Softening Algorithm and Stochastic Failure Algorithm Open

Liangliang Ding, Jingyuan Zhou, Wenhui Tang, Xianwen Ran, Cheng Ye · 2018

In order to more realistically reflect the penetrating and crushing process of a PELE (Penetration with Enhanced Lateral Efficiency) projectile, the stochastic failure algorithm and crack-softening algorithm were added to the corresponding…

Rapid Evaluation and Analysis of the Deformation of Filled Cylindrical Casing with Deforming Charge Width Based on Self-Compiled MATLAB Program Open

Liangliang Ding, Zhenduo Li, Fangyun Lu, Xiangyu Li · 2018

The casing of deformable warheads warps under the action of deforming charges. The deformation profiles may be concave-, convex-, or D-shaped, but they are all symmetrical. The D-shape is considered the optimal deformation profile. The wid…

Rapid assessment of the spatial distribution of fragments about the D-shaped structure Open

Liangliang Ding, Zhenduo Li, Fangyun Lu, Xiangyu Li · 2018

The deformable warhead is a common type of anti-missile warheads, and the geometric configuration of deformable warhead is close to D shape under the lateral blast loading of auxiliary charge. In this article, the spatial distribution of f…

Research into the Energy Output of Asymmetric Cylindrical Structure under Internal Explosion Loading Open

Liangliang Ding, Zhenduo Li, Fangyun Lu, Xiangyu Li · 2018

The energy output characteristic of an asymmetric cylindrical structure under internal explosion loading has significant research value in the field of the national defense industry. This paper took the D-shaped structure as the research o…

Simulation Study on Jet Formability and Damage Characteristics of a Low-Density Material Liner Open

Liangliang Ding, Wenhui Tang, Xianwen Ran · 2018

The shaped charge tandem warhead is an effective weapon against the ERA (explosive reactive armor). Whether the pre-warhead can reliably initiate the ERA directly determines the entire performance of the tandem warhead. The existing shaped…

Research on Subsidence Intervention of Planet Rover Based on Wheel Soil-bin Test Open

Dawei Han, Liangliang Ding, Liu Dian-fu, Xiaoqing Yang, Wenbo Feng · 2017

It may encounter many unexpected events when the rover moving on the surface of the planet.Subsidence is fatal for the impact of mobile performance.It's very important to research on subsidence prediction and intervention measures when enc…

The Dispersion Rule of Fragments about the Asymmetric Shell Open

Liangliang Ding, Zhenduo Li, Minzu Liang, Xiangyu Li, Fangyun Lu · 2017

In order to obtain the dispersion rule of fragments about the asymmetric shell subjected to internal blast loading, two different cross section structures, concave-shaped and convex-shaped, were carried out by experimental and numerical me…

Prediction of pressure between packers of staged fracturing pipe strings in high-pressure deep wells and its application Open

Fuxiang Zhang, Liangliang Ding, Xiangtong Yang · 2015

Addressing to the deteriorated load conditions of working string and packers caused by annular pressure drop between packers during the staged stimulation of high-pressure deep well, one 2D temperature field transient prediction model for …

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