The Structural Design and Experimental Research of Multi-Level Cushioning Packaging Storage Box

2013 ◽  
Vol 655-657 ◽  
pp. 207-210
Author(s):  
Ming Xi Hu ◽  
Sheng Jun Liu ◽  
Yan Jun Zhang ◽  
Zhen Jie Du ◽  
Feng Tian ◽  
...  
Keyword(s):  
Experimental Research ◽  
Structural Design ◽  
Impact Force ◽  
Steel Wire ◽  
Wire Rope ◽  
Hydraulic Damper ◽  
Emergency Rescue ◽  
Multi Level ◽  
The Moment ◽  
The Impact

Aiming at the damage of package caused by emergency rescue and other severe transportation environment, a multi-level cushioning packaging storage box is proposed in this paper, the precise instrument is fixed in the box, which achieves the box-instrument integration. At the moment when air-dropped box touches the ground, the impact force is absorbed and cushioned through plastic cork base, rubber absorber, box body, steel wire rope spring, hydraulic damper for five times, which could provide effective cushion protection for the precise instrument which fragility value is not less than 15G. Simulation airdrop tests are performed to the storage box with different cushion levels, and the test shows that the result of five-level cushion method proposed in the paper is the best, and overload values are all within 12G, which could provide enough cushion space for precise instrument to avoid touchdown damage.

Wire Cable Failures in Climbing Anchor Chocks

2007 ◽  
Vol 348-349 ◽  
pp. 165-168
Author(s):  
Jeffrey Vogwell ◽  
Jose Maria Minguez
Keyword(s):  
Failure Modes ◽  
Impact Force ◽  
Steel Wire ◽  
Research Programme ◽  
Wire Rope ◽  
Rock Climbing ◽  
Light Weight ◽  
Secure Attachment ◽  
Rock Face ◽  
The Wire

Anchor chocks are used in the sport of rock climbing for providing secure attachment to a rock face. They are used at regular intervals and must be light weight (since many are carried) and also sufficiently strong to withstand an impact force should a climber fall from a height. In chock design, steel wire cable is widely used for connecting the nut component, which is wedged into a rock crevice, to the free end which attaches, via a karabiner link, to the safety rope. However, the wire cable is vulnerable to failure as it can fray with use at exposed ends - especially when folded into a loop using tight bends. Also, the ferrule end connections are considered a potential design weakness. In a research programme tests have been carried out on new and also some well used anchor chocks and has revealed very different, and some unpredicted, failure modes – depending on the state of the wire rope and whether the applied load at failure was static or impact. This paper presents the results of test failures for a range of chocks and discusses the benefits of using single lengths of wire cable with suitably swaged end ferrules.

scholarly journals INCREASED VIBRATION ON REFRIGERATOR SHIPS OF B437/11 PROJECT AND TECHNICAL PROPOSALS ON ITS REDUCTION

2018 ◽  
pp. 58-69
Author(s):  
Minas Armenakovich Minasyan ◽  
Aung Myo Thant ◽  
Armen Minasovich Minasyan
Keyword(s):  
Service Life ◽  
Vibration Isolation ◽  
Steel Wire ◽  
Modern Technology ◽  
Wire Rope ◽  
Diesel Generator ◽  
Vibration Isolators ◽  
Wide Range ◽  
Isolation Systems ◽  
The Impact

The paper considers the causes of increased vibration of four auxiliary diesel-generator sets of "Sulzer" 5АL25 type on board nine refrigerated vessels of B437 / 11 project after 15 years of operation. The proposed wide range of possible applications to address the problem of high vibration of diesel generators and motor vessels there were generally implemented upgraded turbocharger brackets, engine sub-frame and supporting spiral-rope vibration isolators in the shock absorption system of the diesel-generator. Four original patented technical solutions have been presented, among which one solution is implemented in 5AL25 diesel generator and 2H 8.5/11 diesel damping systems. There has been offered wide application both wire rope vibration isolators and combined isolators, in which elastic elements are made of nonflammable materials. Wire rope vibration isolators combine high bearing capacity (static loads within 1 N - 50 kN) with high elasticity under dynamic effects; their natural frequencies can drop to 2.5 Hz. Under the worst conditions 75% of the free moving weakens the impact to values that ensure the necessary safety of the object. Experience in designing vibration isolation systems allows to set the maximum range of loads within 15 - 25 g. The vibration isolators made of steel wire rope are practically not affected by the environment, they are made of stainless steel. They effectively operate at temperatures -200°C - +370°C in the presence of oil, dirt, sand, salt fog, etc. They usually have a service life comparable with the service life of the insulated object. Wire rope vibration isolators and combined vibration isolators can be used in all fields of modern technology: shipbuilding, power engineering, automotive, aviation and space industries, etc.

scholarly journals The Influence of an EPS Concrete Buffer Layer Thickness on Debris Dams Impacted by Massive Stones in the Debris Flow

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Xianbin Yu ◽  
Xiaoqing Chen ◽  
Wanyu Zhao ◽  
Jiangang Chen
Keyword(s):  
Debris Flow ◽  
Buffer Layer ◽  
Structural Design ◽  
Impact Force ◽  
Three Dimensional ◽  
Time History ◽  
Expanded Polystyrene ◽  
Debris Dams ◽  
The Impact ◽  
Debris Dam

The failure of debris dams impacted by the massive stones in a debris flow represents a difficult design problem. Reasonable materials selection and structural design can effectively improve the resistance impact performance of debris dams. Based on the cushioning properties of expanded polystyrene (EPS) concrete, EPS concrete as a buffer layer poured on the surface of a rigid debris dam was proposed. A three-dimensional numerical calculation model of an EPS concrete buffer layer/rigid debris dam was established. The single-factor theory revealed change rules for the thickness of the buffer layer concerning the maximal impact force of the rigid debris dam surface through numerical simulation. Moreover, the impact force-time/history curves under different calculation conditions for the rigid debris dam surface were compared. Simulation results showed that the EPS concrete buffer layer can not only effectively extend the impact time of massive stones affecting the debris dam but also reduce the impact force of the rigid debris dam caused by massive stones in the debris flow. The research results provide theoretical guidance for transferring the energy of the massive stone impact, creating a structural design and optimizing debris dams.

scholarly journals The Analysis of Mechanical Structure of a Robotic Leg in Running for Impact Mitigation

2020 ◽  
Vol 10 (4) ◽  
pp. 1365
Author(s):  
Jungsoo Cho ◽  
Kyoungchul Kong
Keyword(s):  
Impact Force ◽  
Legged Robots ◽  
Component Level ◽  
Impact Mitigation ◽  
Mechanical Structure ◽  
Total Length ◽  
The Moment ◽  
Robotic Leg ◽  
The Impact ◽  
Impact Experiments

Legged robots suffer from the impact due to the consistent collisions with the ground. At the moment of collision, the sudden impact force not only causes the legs to lose contact off the ground, but can also reduce controllability and durability. This phenomenon becomes worse for the robots in running. In order to mitigate such an impact effectively, this study focuses on the mechanical structure of the legs, unlike the previous studies, which focused on the component level. The mechanical structures include actuator configuration, segment ratio, total length, and flexion direction. Contact inertia (CI), closely related to the impact, is derived and utilized to analyze the mechanical structure in terms of impact mitigation. A series of impact experiments with a fabricated leg verify that the mechanical structure affects mitigating the impact.

Impact Analysis of Different Cable Types on Saddle-Shaped Cable-Net in Construction Process

2012 ◽  
Vol 479-481 ◽  
pp. 190-193
Author(s):  
Zhan Sheng Liu ◽  
Ran Zhang
Keyword(s):  
Mechanical Properties ◽  
Impact Analysis ◽  
Steel Wire ◽  
Steel Structure ◽  
Element Model ◽  
Wire Rope ◽  
Construction Process ◽  
New Type ◽  
Prestressed Steel Structure ◽  
The Impact

Cable is widely used in the actual project of prestressed steel structure for its mechanical properties can be fully used. Saddle-shaped cable net is a new type of large-span prestressed structure, but there is little study on the impact of different cable types on the mechanical properties of saddle-shaped cable net during the construction. In order to meet the thought of integration of design and construction, a finite element model of saddle-shaped cable net has been established. The four types of cables such as semi-parallel steel tendon cable, steel wire rope cable, steel strand cable and full-locked coil rope are chosen. The impact on mechanical properties of the structure was analyzed by different cable types.

scholarly journals PENGARUH CAIRAN ALUMINIZING TERHADAP KEKERASAN KAWAT BAJA

2017 ◽  
Vol 3 (2) ◽  
Author(s):  
Dwi Putranto N ◽  
Dody Prayitno
Keyword(s):  
Room Temperature ◽  
Steel Wire ◽  
Intermetallic Layer ◽  
Hardness Test ◽  
Wire Rope ◽  
Heavy Load ◽  
Steel Wires ◽  
The Wire ◽  
Wire Strand ◽  
The Impact

Wire rope is made from several steel  wires a combined form a strand, a couple of strands twisted around the core to form a steel rope. One example of its usage is on the bridge to provide support for a heavy load. The steel wire is composed of several parts that is, steel wire, core and wire strand. Increasing the hardness of steel wire have the impact, the hardness of the steel wire. In an effort to improve the hardness of steel wire, there are opportunities to increase the hardness of steel wire with aluminizing method. The aim of this research is to find out the hardness of Wire in aluminizing process with alloys Al - Cu - Sn. Moreover to the research also aims to focus on the addition of Sn element in Al - Cu liquid. The methodology research was preceded by spliting wires from the wire rope. After that cut the wire into the sample wire. Then soak the wire into Al - Cu – Sn liquid at a temperature of 700ºC for ± 3 minutes. Elements of Sn which contained in the composition of Al - Cu - Sn vary from 0 % , 10 % and 20 % , while for CU’s component is 10 % and the rest of is Al, and the latter only elements of Al - Sn, without adding Cu element. Wire samples were then take away and cooled at room temperature, then test the wire by using micro hardness test, the test data was analyzed with Anova and finally made a conclusion. The results of this of this research showed that for the violence that occurs in the intermetallic layer shows the increase in value of hardness obtained on steel wire.

The Application of UG Finite Element Analysis on Dynamic Load Analysis of Cable Pendulum Bar

2014 ◽  
Vol 1006-1007 ◽  
pp. 331-335
Author(s):  
Xiao Qing Wu ◽  
Ji Ming Xue ◽  
Ying Qiang Zheng ◽  
Huan Gong Wang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Impact Load ◽  
Steel Wire ◽  
Wire Rope ◽  
Shearing Stress ◽  
Element Analysis ◽  
Locking Mechanism ◽  
Load Analysis ◽  
The Impact

Cable pendulum bars need to withstand not only the gravity of ripe plug and cable but also the impact load of the shedding of ripe plug. In this paper, the cable pendulum bar was modeled and analyzed using finite element analysis by UG NX4, and stiffness strength check was carried out on cable pendulum bar. On this basis, the impact load were calculated and analyzed. The shearing stress of forced off cylinder’s block, strength of steel wire rope and the force of cable pendulum bar’s locking mechanism were checked with the shock loads, and the basic theory to design and development cable pendulum bar were provided.

Structural design and mechanical performance evaluations of flexible and lightweight belt by CFRP

2020 ◽  
Vol 34 (07n09) ◽  
pp. 2040034
Author(s):  
Sung-Youl Bae ◽  
Yun-Hae Kim
Keyword(s):  
Performance Evaluation ◽  
Structural Design ◽  
Mechanical Performance ◽  
Steel Wire ◽  
Load Condition ◽  
Mechanical Tests ◽  
Wire Rope ◽  
High Rise ◽  
Reinforced Plastic ◽  
And Performance

This research presents the structural design and mechanical performance evaluation results of a lightweight belt for high-rise elevators. Weight reduction of elevator components is indispensable in developing ultra-high-rise elevators. In this study, the structural design and performance evaluation of high-rise elevator ropes were carried out. The weight of the newly designed Carbon Fiber Reinforced Plastic (CFRP) belt was reduced by 30% compared with the original steel wire rope. The structural analysis results of the CFRP belt showed that the design criteria were met on the design load condition of the belt. Also, mechanical tests were executed to verify the mechanical characteristics of the newly developed belt, with the results showing that the belt had sufficient structural performance compared with conventional steel wire rope.

Numerical Calculation and Analysis of Mechanical Strength of Steel Wire Product

2011 ◽  
Vol 228-229 ◽  
pp. 1022-1028
Author(s):  
Dao Ming Wang ◽  
You Fu Hou ◽  
Qing Rui Meng
Keyword(s):  
Finite Element ◽  
Mechanical Strength ◽  
Steel Wire ◽  
Element Model ◽  
Wire Rope ◽  
Element Analysis ◽  
Wire Ropes ◽  
Tensile Experiment ◽  
The Impact ◽  
Better Than

To obtain the influence law of laying combination and lay pitch multiple on mechanical strength of steel wire product, we took 6×19IWS right lang lay and right regular lay wire ropes as examples, combining with the strength theory, nonlinear finite element analysis were carried out with ANSYS software. The simulation results show the mechanical strength of the lang lay wire rope is better than that of the regular lay at the same lay pitch multiple; the lay pitch multiple of rope has a great impact on mechanical strength of steel wire product, however, the impact trend is similar among difference laying combinations, meanwhile the effect of the lay pitch multiple of strand is relatively small. Finally, finite element model for wire rope was verified reasonable through tensile experiment. Research results have important applications value for structural design and rational use of wire rope.

scholarly journals Elements to improve theory of roller cutter bit with chisel teeth

2019 ◽  
pp. 42-47
Author(s):  
M. S. Vorobiov ◽  
B. S. Berezhnytskyi
Keyword(s):  
Impact Force ◽  
Interaction Force ◽  
Oblique Impact ◽  
Drill String ◽  
Tangential Component ◽  
Moment Of Inertia ◽  
The Moment ◽  
Maximum Impact Force ◽  
The Impact

The article deals with solving the problem of determination in the first approximation of the time of the interaction of tricone bit tooth with the rock and the maximum dynamic impact force. Considered the roller bit teeth are of types Sh and B. The shape of the bottom hole after the previous penetration the rock is adopted as having spherical mounds between paths. It is believed that deformations during the impact of the tooth occur only in the area of ​​the mounds, neglecting the masses of the rock material being deformed. The concept of the consolidated mass of the part of the rock, which is disintegrated and sections of the mass of the drill string with a roller bit is introduced. Separate consideration is given to determining the time and maximum impact force at the stages of sinking the rock and the raising of the tooth from it. In raising the plastic deformation of the material of the rock and its elastic return are taken into account. The determination of these parameters is carried out both without considering the moment of inertia of the roller bit, as well as taking into account this moment. It is shown that during the oblique impact of the tooth on the mound, taking into account the moment of inertia of the roller bit, it is necessary to know the coefficient of friction of the rocks over the tooth and the initial acceleration of the roller bit. In this case, the normal and the tangential component of the force of the specified impact of the tooth on the mound is considered separately. Were suggested analytical dependences for determination of the normal and tangent component of the shock interaction force module, as well as their maximum value.

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