{"title":"Corrosion Fatigue Testing of Propeller Alloys","authors":"T. P. May","doi":"10.5957/pss-1975-010","DOIUrl":"https://doi.org/10.5957/pss-1975-010","url":null,"abstract":"The test program is underway to obtain new S-n data at several mean stress level for ABS bronzes type 2, 4 and 5 plus type CA6NM stainless steel. The results at 100 megacycles will be used to compare the alloys through the use of modified Goodman diagrams. The test 200 cpm.in the sea water and extending up to 100 mc (nearly one year) duration shall provide a higher ratio of corrosion damage to fatigue damage than that obtained in short-term high-frequency testing. Heavy section castings to approximate the root section of a propeller blade are the source of material for Krouse type fatigue specimens.","PeriodicalId":386765,"journal":{"name":"Day 2 Wed, July 23, 1975","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1975-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117015314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Structural Analysis of Propellers Rotating Under Water Using Holography","authors":"J. Sikora","doi":"10.5957/pss-1975-012","DOIUrl":"https://doi.org/10.5957/pss-1975-012","url":null,"abstract":"A structural analysis has been performed on a marine propeller blade model operating under water. Holographic interferometry was used to measure the three-dimensional displacement components from which changes in the angle of attack, loads, and surface stresses were determined.","PeriodicalId":386765,"journal":{"name":"Day 2 Wed, July 23, 1975","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1975-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123306293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Factors Affecting Design Stresses in Marine Propellers","authors":"A. Webb, C. Eames, A. Tuffrey","doi":"10.5957/pss-1975-009","DOIUrl":"https://doi.org/10.5957/pss-1975-009","url":null,"abstract":"The paper is concerned with the development of a satisfactory basis for assessing design stresses. An attempt is made to trace the prime factors involved and details are given of corrosion fatigue tests at various mean stresses on propeller alloys in the form of heavy castings. A new philosophy of design stressing has been evolved taking these various factors into account.","PeriodicalId":386765,"journal":{"name":"Day 2 Wed, July 23, 1975","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1975-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115755465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Mechanical, Fatigue and Corrosion Properties of Propeller Bronzes","authors":"E. Czyryca, R. Niederberger","doi":"10.5957/pss-1975-008","DOIUrl":"https://doi.org/10.5957/pss-1975-008","url":null,"abstract":"This paper presents the results of tests on cast manganese bronze, manganese-nickel-aluminum bronze, and nickel-aluminum bronze which are extensively used in marine propellers. The mechanical, fatigue, and corrosion properties of the alloys in various size castings were studied. The strength, ductility, and toughness were measured and the fatigue and corrosion fatigue behavior of the alloys and weldments were determined. General corrosion, crevice corrosion, corrosion impingement, cavitation-erosion, impingement, and stress-corrosion test results in the sea water are presented. The relation of laboratory test data to pro-propeller performance is discussed.","PeriodicalId":386765,"journal":{"name":"Day 2 Wed, July 23, 1975","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1975-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129693267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Steady and Time-Dependent Propeller Blade Loading and Stress Analysis","authors":"S. Tsakonas, W. R. Jacobs","doi":"10.5957/pss-1975-007","DOIUrl":"https://doi.org/10.5957/pss-1975-007","url":null,"abstract":"The unsteady lifting surface theory has been utilized in evaluating the blade loading distribution at all shaft frequencies and the corresponding hydrodynamic forces and moments at multiples of blade frequency (thrust, torque, bearing forces and bending moments) taking into account as realistically as possible the geometry of the propeller and the inflow field stresses are determined by means of beam theory and the finite element technique, although the latter should be considered as a first attempt.","PeriodicalId":386765,"journal":{"name":"Day 2 Wed, July 23, 1975","volume":"38 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1975-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120925972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Wake, Speed and Structural Dynamics Related to Blade Stresses","authors":"R. Wereldsma, S. Hylarides","doi":"10.5957/pss-1975-011","DOIUrl":"https://doi.org/10.5957/pss-1975-011","url":null,"abstract":"Propeller blade stresses are calculated using the three-dimensional, unsteady lifting surface theory and the finite element technique. Correlation With full scale measurements is given.\u0000 Attention is paid to the dynamic aspects, especially with regard to the circumferential unsteadiness of the Wake field.\u0000 A model technique is suggested with regard to blade vibrations for a propeller operating in water.","PeriodicalId":386765,"journal":{"name":"Day 2 Wed, July 23, 1975","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1975-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123101235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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