固体火箭技术
固體火箭技術
고체화전기술
JOURNAL OF SOLID ROCKET TECHNOLOGY
2014年
5期
729-733
,共5页
赵丽娜%贺平照%邢树根%嵇阿琳%周绍建%程文%梁晋
趙麗娜%賀平照%邢樹根%嵇阿琳%週紹建%程文%樑晉
조려나%하평조%형수근%혜아림%주소건%정문%량진
炭/炭复合材料%高温%数字散斑%应变
炭/炭複閤材料%高溫%數字散斑%應變
탄/탄복합재료%고온%수자산반%응변
carbon/carbon composites%high temperatures%digital speckle correlation method%strain
主要介绍了炭/炭( C/C)复合材料在高温下(最高至2600℃)利用数字散斑技术进行的应变测量。试样表面喷涂钨粉作为目标散斑。在试验环境箱中将试样升温至试验温度。在拉伸过程中,对C/C复合材料试样及喷涂其上的钨粉散斑进行窄带滤光,并对滤除炭纤维发出光线后的图像进行采集,对图像中的散斑点进行计算区域的选取,通过散斑点的位移来确定试样在散斑喷涂区域内材料的变形,进而得到在2600℃温度条件下试样有效段的应变。测量结果表明,该方法可直观准确地反映出C/C复合材料试样在2600℃应变状态,对于需要测量的关键点可实现重点跟踪,动态测量出该点在任意时刻任意位移的应变。该测试方法精度高,并可应用到不同受力方向的应变测试场合。
主要介紹瞭炭/炭( C/C)複閤材料在高溫下(最高至2600℃)利用數字散斑技術進行的應變測量。試樣錶麵噴塗鎢粉作為目標散斑。在試驗環境箱中將試樣升溫至試驗溫度。在拉伸過程中,對C/C複閤材料試樣及噴塗其上的鎢粉散斑進行窄帶濾光,併對濾除炭纖維髮齣光線後的圖像進行採集,對圖像中的散斑點進行計算區域的選取,通過散斑點的位移來確定試樣在散斑噴塗區域內材料的變形,進而得到在2600℃溫度條件下試樣有效段的應變。測量結果錶明,該方法可直觀準確地反映齣C/C複閤材料試樣在2600℃應變狀態,對于需要測量的關鍵點可實現重點跟蹤,動態測量齣該點在任意時刻任意位移的應變。該測試方法精度高,併可應用到不同受力方嚮的應變測試場閤。
주요개소료탄/탄( C/C)복합재료재고온하(최고지2600℃)이용수자산반기술진행적응변측량。시양표면분도오분작위목표산반。재시험배경상중장시양승온지시험온도。재랍신과정중,대C/C복합재료시양급분도기상적오분산반진행착대려광,병대려제탄섬유발출광선후적도상진행채집,대도상중적산반점진행계산구역적선취,통과산반점적위이래학정시양재산반분도구역내재료적변형,진이득도재2600℃온도조건하시양유효단적응변。측량결과표명,해방법가직관준학지반영출C/C복합재료시양재2600℃응변상태,대우수요측량적관건점가실현중점근종,동태측량출해점재임의시각임의위이적응변。해측시방법정도고,병가응용도불동수력방향적응변측시장합。
A method of strain measurement at high temperatures ( up to 2 600 ℃) for carbon/carbon composites by digital speckles was introduced. The samples in the test were sprayed with tungsten powder as the target speckles. Then the samples were heated to the test temperature. The samples emitted bright light by carbon/carbon composites and tungsten. After the narrowband fil-tered the light in the tension test, the light by carbon fiber was filtered and the light by tungsten was reserved. Then the image ac-quisition was performed. It is found that the image processing can reflect the strain state, reconstruct the profile of the specimen sur-faces vividly and reproduce the deformation field of the strain field. For critical points, the image processing can also track their trajectory and calculate their strain at any time and arbitrary displacement. It also shows that the digital speckle correlation method is an accuracy measurement. Furthermore the method can be utilized to various mechanical sites.