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The design and construction of a high‐pressure bursting strength tester is described.

The tester has a large aperture and is intended to operate with coated industrial fabrics. To ensure safe operation, since the tester is capable of operating up to pressures of 5,000 kPa, water is used as the inflation medium and all tests are conducted under water. The tester is designed to operate on both flat specimens and cylindrical specimens.

Sample results are reported to demonstrate the successful operation of the tester on plain specimens and on specimens with welded and taped seams. The tester has demonstrated that it is capable of yielding reproducible and useful results on coated industrial fabrics of the type used to manufacture inflatable boats.

The low‐cost, high pressure bursting strength tester can be used for lightweight, coated industrial fabrics of the type commonly used in the construction of inflatable boats and liferafts.

The tester was developed to support a programme of work to develop a lightweight, collapsible decompression chamber. Although the parameters of the tester were chosen to meet the needs of the decompression chamber project, the tester has wider application and may, therefore, be of wider interest.

The aim of this study is to assess the opportunity for the development of hydrocarbon transportation using high-strength steel (HSS) in pipeline construction in terms of cost savings and reliability.

Several optimizations of pipeline design and operations were performed to estimate the total life-cycle cost variation associated with different grades of high-strength steel. The generalized reduced gradient (GRG) method was used in an Excel table to determine optimal total life cycle each pipeline. Variables used in this optimization with respect to each steel grade were as follows: pipeline external diameter, wall thickness, number of compression stations and installed power in each compression station. The reliability of a pipeline with optimal cost was assessed to highlight the impact of steel grade on pipeline reliability.

The study showed that the cost reduction is strongly dependent on the adopted gas pipeline configuration. The number of compression stations and external diameter are the main factors influencing the pipeline total life cycle cost, while the steel price seems to have a minor effect, the reduction of the gas pipeline total life cycle does not exceed 5% even with a 50% difference in pipe steel prices between X70 and X100 steels. On the other side, for the same external diameter, X100 steel presents better pipeline reliability against carbonic corrosion compared to X70 steel.

The main contribution of this study is to provide a decision-support tool to help pipeline constructors enhance the profitability of natural gas transmission pipelines. The optimization method used is simple to use for design engineers during a feasibility study.

The present study presents one step to fill the gap concerning the question of balancing the trade-off between cost savings and structural reliability in high-strength steel pipelines during the early stages of feasibility studies. The optimal design and operations parameters ensuring cost savings on total life cycle costs are identified via an optimization method. The impact of selected optimal parameters on the long-term pipeline service life was estimated via a structural reliability analysis.

The purpose of this paper is to gain an in-depth understanding of the research progress, hotspots and future trends in the field of functional clothing.

The records of 4,153 pieces of literature related to functional clothing were retrieved from Web of Science by using a comprehensive retrieval strategy. A piece of software, CiteSpace was used as a tool to visualize the results of specific terms, such as author, institution and keyword. By analyzing the knowledge maps with several indicators, the intellectual basis and research fronts for the functional clothing domain could then be demonstrated.

The result indicated that functional clothing was a popular research field, with approximately 500 papers published worldwide in 2020. Its main research area was material science and involved public environmental and occupational health, engineering, etc. showing the characteristic of multi-interdisciplinary. Textile Research Journal and International Journal of Clothing Science and Technology were the top two journals in this field. The USA, China, Australia, England and Germany have been active and frequently cooperating with each other. Donghua University, the Hong Kong Polytechnic University and NASA, with the largest number of publications, were identified as the main research drivers. According to the co-citation analysis, thermal stress, nanogenerator and electrospinning were the topics of most cited articles during the past 20 years.

The findings identified smart clothing and protective clothing to be the research frontiers in the field of functional clothing, which deserved further study in the future.

The outcomes offered an overview of the research status and future trends of the functional clothing field. It could not only provide scholars with convenience in identifying research hotspots and building potential cooperation in the follow-up research, but also assist beginners in searching core scholars and literature of great significance.

AN attempt has been made to include most of the major aspects of the subject and to provide material for discussion by both maker and user of flexible pipe assemblies. Such an assembly is a complete unit consisting of both hose and end couplings for conveying liquids and gases between component parts of an airframe or engine under widely varying conditions.

A description of how oxygen pressure vessels for the prototype B.A.C./Sud Concorde are manufactured from seamless steel tubing produced by the Weldless works of Tubes Limited and an outline of the salient features of the Concorde's oxygen system for crew and passengers. On February 28, 1968—just fourteen months hence—the first prototype Concorde supersonic airliner (FIG. 1) will make its maiden flight from the Toulouse‐Blagnac airfield in France. Six months later the second prototype will make its first flight from British Aircraft Corporation's airfield at Filton, Bristol. In September 1969, and November 1969, respectively, two pre‐production aircraft will fly for the first time—these having a longer fuselage, higher gross weight, additional fuel capacity and higher payload capacity than the prototype aircraft. Apart from the fact that the pre‐production types will carry full flight test instrumentation, they will be fully representative of production Concordes—60 of which have already been ordered for service with thirteen leading world airlines.

Developed in the U.S.A., the collapsible aluminium tube now represents over 60% of the collapsible tubes made in the U.K. The metal is resistant to a wide range of products and where necessary it readily takes protective and decorative coatings. This article considers the tube in relation to content and environment and also covers test procedures.

The Cryofit Fitting System achieves its novel abilities from a property called “shape memory”. Materials that have this property become weaker and more malleable when cooled below a certain critical temperature. In this state, they can be deformed easily and will remain deformed and relatively weak as long as they are kept below the critical temperature. When warmed above that temperature, they regain their original strength and return to their original shape with tremendous force.

IN 1966 the Drägerwerk AG got an enquiry to offer an oxygen system for the new short range passenger jet aircraft VFW 614. Up to this time the Drägerwerk AG delivered oxygen system components for existing military and civilian aircraft and even mountain climbers. So it was the first opportunity to equip a newly developed modern commercial passenger jet aircraft with a breathing oxygen system.

Details of Some Components Used for Subsidiary Services in Aircraft, Missiles and Space Vehicles. Now accepted as standard for the Concorde by British Aircraft Corporation is the Voi‐Shan range of Taper‐Lok aerospace fasteners recently introduced into the U.K. by Douglas Kane (Sealants) Ltd. The Taper‐Lok is a patented fastener which has been proved by certain airframe manufacturers to increase the fatigue strength of structural joints by giving a more balanced stress pattern—as shown in fig. 3. This eliminates the points of high stress associated with plain shank bolts since it spreads the stress loading equally over the entire length of the shank.

The high-pressure accumulator has been widely used in the hydraulic system. Failure pressure prediction is crucial for the safe design and integrity assessment of the accumulators. The purpose of this study is to accurately predict the burst pressure and location for the accumulator shells due to internal pressure.

This study concentrates the non-linear finite element simulation procedure, which allows determination of the burst pressure and crack location using extensive plastic straining criterion. Meanwhile, the full-scale hydraulic burst test and the analytical solution are conducted for comparative analysis.

A good agreement between predicted and measured the burst pressure that was obtained, and the predicted failure point coincided very well with the fracture location of the actual shell very well. Meanwhile, the burst pressure of the shells increases with wall thickness, independent of the length. It can be said that the non-linear finite element method can be employed to predict the failure behavior of a cylindrical shell with sufficient accuracy.

This paper can provide a designer with additional insight into how the pressurized hollow cylinder might fail, and the failure pressure has been predicted accurately with a minimum error below 1%, comparing the numerical results with experimental data.