H - hopkinson 中文 - EN166

hopkinson n.霍普金森〔姓氏〕。

hoplite
To set up reasonable designing and manufacturing techniques and accurate calibration system and to speed up forming the native pvdf pressure sensors is the direction of this project . first , based on the piezoelectric theorem , the theoretic support of pvdf pressure sensors is deduced . according to purposes of practical projects , special purpose sensor configurations are designed and the corresponding calibration system based on shpb ( split hopkinson pressure bar ) technique is built in succession 本文從壓電材料的一般壓電控制方程開始，導出了pvdf壓電薄膜測壓技術的相關論據；根據測試目的以及被測結構的特點，設計了多種夾心式的傳感器構造形式；摸索出了一套基于國產pvdf壓電薄膜制作壓力計的加工、安裝工藝；建立了一套基于系統集成技術的多點pvdf壓力測試的數據采集、處理系統；建立了一套基于shpb技術、適用于實際工程應力范圍的pvdf壓力計的動態標定方法，并對兩種厚度的國產pvdf壓電薄膜進行了標定。
The effects of reinforcing particle size on deformation strengthening and localization behavior of sicp / 2024al composites are investigated by making use of split hopkinson compression bar and hopkinson torison bar . the experimental results demonstrate that the strengthening effect for the small - size particle - reinforced composite is higher than that for the large - size particle - reinforced composite 實驗表明：這類復合材料無論是在沖擊壓縮還是沖擊扭轉載荷下其變形強化和局部化行為都具有明顯的顆粒尺寸效應，即增強顆粒尺寸越小，變形強化效果越好，越易發生絕熱剪切變形局部化失穩。
In order to proof the program ' s effectiveness , we made some experiments on ly - 12a1 by shpb . in addition , based on the pochhammer - chree ' s theoretical solution about the stress wave propagation in infinite cylindrical bar , a numerical approach for analyzing dispersion in shpb experiments is developed 由于應力波在桿中傳播時存在彌散效應，在hopkinson桿實驗中，采用桿中某處的應變來代替桿與試件接觸端面處的應變，這必然會因為應力波的彌散效應給實驗結果帶來偏差。
Most researchers working in rock field proposed that the hopkinson system be a ideal dynamic - loading equipment and the brazilian disc be a novel specimen . according to the above , this paper suggests a new method to test the dynamic strength and dynamic fracture toughness , firstly leads the cracked chevron notched brazilian disc ( ccnbd ) which was recommended by international society for rock mechanics ( isrm ) in 1995 in testing dynamic fracture toughness , which brings in a new way in dynamic testing for rock . it is expected that the work of this dissertation will provide important basis for the further research and application of mechanical behavior of rock 結合巖石動力學領域普遍采用的動態加載設備即分離式hopkinson壓桿裝置和新穎的平臺巴西圓盤試樣，本文提出了一套測試巖石動態強度和動態斷裂韌度的新方法，并首次將國際巖石力學學會( internationalsocietyforrockmechanics ? isrm )于1995年推薦的人字形切槽巴西圓盤( crackedchevronnotchedbraziliandisc ? ccnbd )試樣引入動態斷裂韌度的測試中，為巖石的動態斷裂力學參數的測試找到了一條新的途徑。
The experiment of falling bar and hopkinson bar were carried out , useful conclusions were made , and good datum was obtained . in chapter 6 , based on the results of chapter 5 , some improved schemes were put forward , and designed a new structure . the performance of the new structure would be improved greatly 第六章在根據第五章測試結果中發現的問題，提出了一些改進的方案，對原雙薄板梁島結構進行了改進，在此基礎上提出了一種新的結構，新的結構在性能上要比原有結構有了很大的改善。
Sicp / al matrix composites , with 5 , 15 and 25 % volume fraction of sic particles , were prepared by vacuum hot - pressing sintering processing in this paper . based on mechanics properties , sem observation and energy dispersive x - ray analysis , the interface reaction phenomenon of sicp / al composites made by vacuum hot - pressing sintering , as well as the reinforcement and fracture mechanisms of this composite were analyzed . the dynamic responses of sipc / al composites were studied by a split hopkinson high - speed pressure bar impact system which strain rate was from quasistatic state strain rate ( 3 . 3 10 - 3s - 1 ) to dynamic state strain rate ( 5 . 2 103 s - 1 ) 本研究以武裝直升飛機防護裝甲材料為研究對象，采用真空熱壓粉末冶金燒結工藝制備了含sic顆粒體積分數分別為5 、 15和25的sic顆粒增強鋁基復合材料，結合其力學性能、掃描電鏡和界面微區能譜分析結果，分析了sic _ p al復合材料的真空燒結過程中的界面現象，以及材料增強和斷裂機理，并利用hopkinson高速壓桿沖擊實驗系統對其從靜態到動態(應變率為3 . 3 10 ~ ( - 3 ) s ~ ( - 1 ) 5 . 2 10 ~ 3s ~ ( - 1 ) )的壓縮破壞響應進行了研究，分析了不同體積分數sic _ p al復合材料高應變率壓縮載荷下，材料的變形和微觀損傷機理，以及利用高速沖擊空氣炮測定了改復合材料制備剃度復合板的穿透性能。
Based on the literature exploration , the developments of split - hopkinson pressure bar ( shpb ) techniques and its principles are introduced in this paper . in the present paper , an application of data acquisition by gpib in the hopkinson bar experiments is provided 在文獻調研的基礎上，本文首先對分離式hopkinson (霍普金森)壓桿( shpb )實驗裝置的發展和現狀、實驗裝置的特點和原理進行了綜述。
The bar - bar impact apparatus of split hopkinson tensile / pressure bar for high strain rate tests of fiber reinforced composites is developed . the components of this apparatus , the data sampling method and software are introduced in details 研制用于纖維束和纖維復合材料高應變率下力學性能測試的桿桿型沖擊測試裝置?分離式hopkinson桿，描述該測試裝置的硬件構成、信號采集和分析計算。
Two programs named test . c and testl . c for acquiring wave data from tektronix 2440 oscilloscope and lecroy 9370 oscilloscope by gpib are presented in this paper , respectively 對gpib標準數字接口在hopkinson桿實驗數據采集中的應用作了比較深入的分析，編寫了test和test1采集程序并已在實驗中得到較好的應用。 2
In this paper , the split hopkinson pressure bar ( shpb ) was used to study the compression mechanical behavior of al / sicp mmcs under the high strain rate 本文用自行研制的分段式霍布鑫森壓桿( splithopkinsonpressurebar )研究al / sic _ p復合材料在高應變率下壓縮的力學行為。
The dynamic compression and torsional experiments are done for tungsten - molybdenum alloys through split hopkinson pressure bar and torsion hopkinson bar in this paper 本文利用分離式hopkinson桿對鎢鉬合金進行了動態壓縮和扭轉試驗。
A data processing program for shpb experiments is setup to enhance efficiency of data processing 根據hopkinson桿實驗數據處理的特點編寫了專用程序dataprocess 。
Dynamic behavior of reactive powder concrete in split hopkinson pressure bar testing 試驗對活性粉末混凝土動力性能的研究
Analysis on stress uniformity of viscoelastic materials in split hopkinson bar tests 試驗中粘彈性材料的應力均勻性分析
A novel experimental method of hopkinson pressure bar system for brittle material 壓桿動態實驗新方法