Showing papers in "Ocean Engineering in 1969"

TL;DR: A brief review of titanium physical metallurgy is given and related to alloy development work based on modification of the Ti6Al-4V alloy in this paper.

TL;DR: In this paper, the development of composites such as aggregates of small hollow spheres embedded in a matrix of syntactic foam is discussed. But these composites are not suitable for a wide variety of deep submergence vehicles and deep ocean installations.

TL;DR: In this article, a description of two short-range developments aimed at providing weldable heavy-plate titanium alloys for structures in weight-critical marine applications is given, and the rationale for compositional control to avoid stress-corrosion susceptibility is described.

TL;DR: In this article, the basic strength of various crystalline engineering materials depends in a sensitive way on the imperfection structure which exists in the nature and arrangement of the atoms composing them.

TL;DR: In this paper, the results of structural research program to investigate glass-reinforced plastic materials for pressure hulls of deep-submergence vehicles are summarized and the design concepts and problem areas for fiber reinforced plastic materials are discussed.

TL;DR: In this paper, the relevance of different mechanical and corrosion factors to the selection of materials for ocean engineering is discussed, and the potential uses of these and established alloys in ocean engineering are considered.

TL;DR: In this paper, an energy method solution for the general instability of orthotropic ring-stiffened cylinders subjected to external hydrostatic pressure is presented. But the authors do not consider the longitudinal buckling.

TL;DR: In this article, the types of deterioration and the circumstances under which it occurs for the several classes of material employed in ocean engineering applications are discussed and suggestions as to how difficulties may be avoided are given equal attention.

TL;DR: In this paper, methods for corrosion or deterioration protection and fouling prevention for all types of marine surfaces through the use of coatings and encapsulants are described, based on the research and development efforts of the United States Navy laboratories to cope with the destructive elements of marine environments.

TL;DR: In this article, it was shown that a metal which is brittle at ambient pressure may become ductile when a hydrostatic pressure is applied, i.e., the ductile-brittle transition temperature may be lowered.

TL;DR: In this article, the concept of crack toughness based on linear elastic fracture mechanics and characterized by a critical value of K or G is introduced and the influence of geometry of member and geometry of crack on crack toughness is discussed.

TL;DR: A wide variety of studies relating to fouling and antifouling problems are now possible with the recent development of techniques for hatching, feeding, and maintaining large quantities of barnacle larvae under controlled laboratory conditions as mentioned in this paper.

TL;DR: In this paper, a preliminary study has been made of the effects of hydrostatic pressures up to 10·3kb on the tensile properties of polysulfone, and it was found that increasing the pressure caused tensile strength to increase and the ductility to decrease.

TL;DR: An overview of the state of the art for reinforced plastic materials related to the ocean engineering field is given in this paper, where fabrication and properties of high-strength, filament-wound plastic materials, pertinent to deep-depth pressure hull and bouyancy applications are discussed.

TL;DR: The development of steel weldment systems for hydrospace applications has been concentrated on meeting the requirement for civilian and military hydrospace vehicles because these requirements are the most demanding among the various applications.

TL;DR: In this paper, the authors examined sub-marine cable failures from representative marine environments and found that chafe by bottom currents is a potential danger to a depth of 300 fathoms in certain locales.

TL;DR: In the area of developing ocean technology, the focus of concern with respect to corrosion has shifted from general wastage to critically localized corrision as discussed by the authors, where one of the most important forms of critical corrosion is stress-corrosion cracking.

TL;DR: In this paper, the relevance of different mechanical and corrosion factors to the selection of materials for ocean engineering applications is discussed, and the potential uses of these and established alloys in ocean engineering application are considered.

TL;DR: In this article, some of the more important basic concepts regarding ceramics are presented primarily for engineers with relatively limited knowledge of such materials, and some properties which are of particular importance to ocean engineering and some practical results of applications in ocean environment are also discussed.

TL;DR: In this article, the authors describe the physical principles used in image converter systems and present a critical discussion of each theoretical treatment made, and a criterion for the evaluation of image convertors for underwater viewing is given.

TL;DR: In this article, the authors developed certain viewpoints which arise from experiments which have been carried out at the Naval Construction Research Establishment, to assess the low cycle fatigue properties of high yield, low alloy steel structures using standard and specially devised type tests.

TL;DR: Investigations currently under way at Naval Applied Science Laboratory and Osborn Lab of Marine Sciences, New York Aquarium are discussed in this paper, including new bioassay approach for evaluating toxic coatings, discussion of some factors that may influence marine fouling, and program of research on adhesive substances produced by metamorphosed and growing barnacles and by barnacle larvae.