深海载人潜水器载人球备选钛合金的断裂韧性试验结果分析(英文)  

Analysis on Fracture Toughness Test Results of Candidate Titanium Alloys Used in Deep Manned Submersibles

作　　者：王芳[1] 崔维成[1] 沈允生[1] 潘彬彬[1] 潘彬彬(1982-),男,中国船舶科学研究中心工程师. 

机构地区：[1]中国船舶科学研究中心,江苏无锡214082

出　　处：《船舶力学》2012年第9期1056-1063,共8页Journal of Ship Mechanics

基　　金：supported by High-tech 863 Program under the project of “Development of a 4 500 m deep manned submersible” (Project No. 2009AA093303);Fourth Term of “333 Engineering” Program of Jiangsu Province under the project of “Fatigue and fracture performance of domestically produced high strength titanium alloys for the 4 500 m deep manned pressure hull” (Project No.BRA2011116)

摘　　要：为提高结构的可靠性,深海载人潜水器载人球的设计标准越来越重视材料的综合性能,因此钛合金成为广泛应用于潜水器耐压球壳的理想材料。基于断裂韧性指标的损伤容限设计原则将在未来的结构优化方案中得到体现,其中断裂韧性是重要的材料损伤容限特性之一。为研制4500m载人潜水器,文中对两种备选钛合金的多组非标试样断裂韧性试验结果进行了分析,重点考察了相同韧带尺寸下试件厚度的效应,对非标试样KQ和P_max/P_Q随着厚度的变化趋势进行了解释,为修改现行断裂韧性试验标准提供了建议。The current material selection and design rules for the spherical pressure hull of manned submersibles pay more attention to the synthetic properties of materials of interest for high safety and reliability. Several types of titanium alloys are developed for this purpose. Damage-tolerant proper- ties will be considered for more optimized design principle in the future. Fracture toughness is one of the main damage-tolerant properties. For the material selection and design of a 4 500 m depth manned submersible in China, tests using non-standard specimens are conducted on two types of candidate ti- tanium alloys. Thickness effect is specifically investigated using specimens with similar ligament size. Analysis on the tendency of KQ and P/PQ data with increasing specimen thickness will be conduct- ed in this paper. This will be useful for modifying the current test standard for thinner specimens.

关 键 词：钛合金 深海载人潜水器 断裂韧性试验 韧带尺寸 试件厚度 

分 类 号：U661.4[交通运输工程—船舶及航道工程]