拉伸過度 的英文怎麼說
中文拼音 [lāshēnguòdù]
拉伸過度
英文
overstretching-
The results from x - ray diffraction demonstrated that pp / mmtome was a fully intercalated nanocomposite, pp / mmtom and pp / ommt were partly intercalated nanocomposites, but the intercalation effect of pp / mmtom nanocomposite was better ; the crystallization characteristics of pure pp and pp / mmt nanocomposites were investigated by dsc, waxd and pom. the result of these testing showed that mmt nano - layers acted as nucleating agents for the crystallization of pp, the addition of mmt had effect on the crystallization process, leading the increasing of crystallization temperature crystallization rate and crystallinity, but also the dimension of spherulite reduced. but the formation of pp crystal did n ' t change, the formation of pp crystal in three pp / mmt nanocomposites and pure pp were a - form on the whole ; influences of three sorts of mmt on mechanical properties of pp / mmt nanocomposites were studied, as a result, the addition of mmt comprehensively improved mechanical properties of pp : notched impact strength, tensile strength and flexural properties were all increasing, but the extent of increasing were n ' t large
通過xrd分析比較這三種pp mmt納米復合材料微觀結構得到, pp mmt _ ( ome )屬于完全插層, pp mmt _ ( om )與pp ommt的插層程度相近,但是pp mmt _ ( om )相對較好;通過對純pp和三種pp mmt納米復合材料的結晶性能研究發現,蒙脫土納米片層對pp結晶產生明顯的異相成核作用,結晶能力增強,使pp的結晶溫度和結晶速率提高,結晶度增加,球晶晶粒細化,但是沒有改變pp的結晶形態,三種pp mmt納米復合材料的結晶形態都屬于晶;通過對pp mmt納米復合材料的力學性能測試得知,蒙脫土的加入全面提高了pp的力學性能,缺口沖擊強度、拉伸強度和彎曲性能都有一定程度的提高,浙江{ _業大學碩十學位論文摘要但是提高幅度都不是很大,不過ommt 、 mmtom和mmtc ) me三種蒙脫土對pp力學性能有著不同的改性作用,其中pp / mmtom最好, pp月邊mto崛次之, pp / ommt最低,這種情況主要是由蒙脫土對pp結晶性能的影響和蒙脫土的納米改性作用造成的。Adhesives for load - bearing timber structures - test methods - determination of the effect of acid damage to wood fibres by temperature and humidity cycling on the transverse tensile strength
承重木結構用膠粘劑.試驗方法.通過溫度和濕度循環試驗測定木纖維酸性腐蝕對橫向拉伸強度的影響The v was tested by yjy stress transducer with mvad card by the methods of recording the deformation in the wideness and thickness direction of the specimens during the tensile test. a stable auxetic polyolefin blend with the minimal value - 1. 4 was observed after repeated test
採用附有mvad通道卡的yjy型片式傳感器,記錄試樣在拉伸過程中寬度和厚度方向的形變並根據泊松比的定義進行計算,反復實驗后獲得最小值為- 1 . 4的負泊松比烯烴共混體系。The leahteroid using this new kind of stuff, the function is as three times as nation s norm the radial tensile strength is 754, transverse strength is 698 and peel strength is 23 ; at the same time, it produces the pvc soft and hard boards and products which can stand acid and alkali, and the stuff is as twice as light calcium, all the guidelines reach the requirements of national gb4454 - 8
使用這種新型填料生產人造革,其性能為國家標準的兩倍徑向拉伸強度達754緯向強度698剝離度23生產耐酸堿pvc硬軟板及製品,填料用量為輕鈣的兩倍,其各項性能均達到或超過國家標準gb4454 - 84的要求。Characteristics : as a result of cold processing aging heat treatment, this product has a tensile strength of over 1100mpa
特性:通過冷間加工時效熱處理,拉伸長度達到1100mpa以上This article performed an application of such means as modern test technology, computer processing system, serial ports communication and electrohydraulic proportional control technology to reform the sheetmetal combined testing machine, so that the stretching force, clamping force and the stretching length can be tested and controlled by the computer system, which greatly improved the stability and testing precision of the testing machine
摘要通過應用現代測量、微處理、串口通信、電液比例控制等技術,對自行研製的鈑金綜合試驗機進行了改造,實現了對拉伸力、夾緊壓力和拉伸長度的計算機數據採集和控制,大大提高了原系統穩定性和測試精度。Developing a software for the testing machine measuring and controlling system. the software can automatically switch control mode according to standard in the process of tensile testing and automatically judge constitutive mode of material. at the same time, it can automatically measure elastic modulus e, yield strength o s, proof strength, non - proportional extention o 0. 2, percentage extention 8, tensile strength o b, etc. it can applied in industry practice
在經典pid控制與模糊控制的基礎上,設計了模糊自適應pid控制應用於試驗機的應力、應變及位移控制; 3 、開發了一套完整的試驗機測控系統軟體,能在試樣拉伸過程中按標準自動切換控制方式並自動判別材料本構模式,能夠自動測定彈性模量e 、屈服限_ s 、條件屈服限_ ( 0 . 2 ) 、延伸率、強度限_ b等,應用於工程實際。The fiber tensile strength is affected by concentration, temperature and minus stretch during coagulation, while the fiber structure and performance are obviously in fluenced by stretch temperature, medium and ratio
纖維的拉伸強度在凝固成形過程中受到凝固浴濃度、溫度和負拉伸的影響,同時在纖維的拉伸中拉伸的倍數、溫度和介質等也影響著纖維的結構和性能。Abstract : coagulation and stretch are two crucial working procedures during precursor fabrication, which play important roles in precursor structure and performance. the fiber tensile strength is affected by concetration, temperature and minus stretch during coagulation, while the fiber structure and performance are obviously influenced by stretch temperature, medium and ratio
文摘:凝固成形和拉伸是原絲生產過程中兩個十分關鍵的工序,它們對聚丙烯腈原絲的結構和性能有著重要的影響.纖維的拉伸強度在凝固成形過程中受到凝固浴濃度、溫度和負拉伸的影響,同時在纖維的拉伸中拉伸的倍數、溫度和介質等也影響著纖維的結構和性能On the basis of the research by former people, the work of this paper includes several aspects as follow : throughout a great deal of experiment of the mechanics performance of 2d weave c / sic composite materials laminated plate, we simulated the nonlinear relationship between a and e in the tensile course ; and we inspected the original damages and the damages evolvement ; and we made the statistic analyses of the tensile strength. some important conclusions have been given in the paper
主要有以下幾個方面:在大量二維編織c sic復合材料力學常規性能的實驗基礎上得到了拉伸實驗中卸載點和卸載模量,卸載模量和加載斜率,加載斜率和應力等之間的關系,並在此基礎上得到了模擬同種材料拉伸曲線的非線性的應力?應變關系;配合我們的實驗過程進行初始損傷和缺陷的檢測以及實驗過程中材料損傷演化過程的動態無損檢測;對我們現有的二維編織c sic復合材料拉伸強度數據進行了分佈擬合。The results showed that there was anomalistic crystal whose size reached nanometer grade in fine pvc ; it ' s about 80nm. the crystal structure was damaged by jet - milling, which induced the melting point of nanocrystal pvc decreased from 210 " c to 128 擄 c. the nanocrystal pvc induced the decrease. of plasicizing time and equilibrium torque and the increase of maximal torque, which showed that the nanocrystal pvc had self - plasticization in pvc composites
通過sem 、 tem 、 ftir和dsc測試表明:氣流粉碎制得的pvc微粉中具有不規則納米晶體,尺寸在80nm左右;氣流粉碎破壞了pvc的晶體結構,使納米晶pvc的熔點從210下降到128 ;納米晶pvc使體系塑化時間、平衡轉距降低、最大轉距升高,具有自增塑作用;納米晶pvc的加入使pvc的沖擊和拉伸強度都有大幅度上升。We also found that the rheological behavior of single layer gmt is isotropic. temperature and pressure method has great affection on the distribution of the fiber. second, we measure the pressure change under different molding rate and use extensional viscosities model and shear force model to analysis the data
研究表明: gmt材料具有很好的充模流動性,流動過程中纖維氈保持一個整體; gmt材料擠壓流動行為表現為各向同性;溫度、壓力制度對纖維的均勻分佈影響很大: 2 )通過測量不同合模速率下壓力變化,採用拉伸粘度模型( extensionalviscositiesmodel )和純剪切流動模型( shearforcemodel )對數據進行分析,導出了描述gmt材料宏觀行為的流變學參數。The cracks extend along the matrix / strengthening - phases interfaces and form the cleavage steps and tear ridges. there appear some very small dimples on the fracture surfaces of the directionally solidified samples, which come from the nb - based solid solution particles in the big plates of the strengthening phases, but no dimples on the fracture surfaces of the as - cast sample. it can be concluded from above results that niobium - niobium silicide based in - situ composites ( rmics ) with a uniformly orientated microstructure can be produced by the ebfzm with high temperature gradient, and their mechanical properties can be increased
隨著抽拉速率的提高和硅化鈮強化相間距與尺度的減小,材料的室溫拉伸強度和斷裂韌性均有提高, _ b最高可達778 . 4mpa , k _ ( ic )達到了46 . 3mpa ? m ~ ( 1 / 2 ) ;試樣的拉伸斷口基本表現為脆性解理斷裂的花樣,裂紋沿基體強化相界面繞過強化相進行擴展,在裂紋擴展方向存在解理臺階,並形成撕裂棱。We first expand the nonlinear temperature - dependent convective and radiative heat transfer coefficient about the ambient temperature by taylor - series method, and then the crystal temperature and the pull rate as well as the bulk melt temperature are determined by the perturbation techniques in a simply analytical manner
分析之過程為首先將隨溫度變化之對流系數及輻射系數做泰勒級數展閉,再以攝動理論之技巧,同時求解晶圓棒之溫度、拉伸速度及溶解液之溫度。Adhesives for load - bearing timber structures - test methods - part 3 : determination of the effect of acid damage to wood fibres by temperature and humidity cycling on the transverse tensile strength
承重木結構用粘合劑.試驗方法.第3部分:通過溫度和濕度循環試驗測定木纖維酸性腐蝕對橫向拉伸強度的影響Through the strong pulling tests of four kinds of synthetic fiber filter cloth, the mechanical performance index of the filter cloth in dry and wet conditions were measured, the influence of various pulling speeds on the fracture strength and the fracture tensile rate of the filter cloth was derived. it was concluded that the stress of the filter cloth could relax when it was beyond the yield point
通過4種合成纖維濾布的強力拉伸試驗,測得了濾布在干、濕兩種狀態下的力學性能指標,得出了不同拉伸速度對濾布斷裂強度和斷裂伸長率的影響,同時指出當濾布的應力超過屈服點時,會出現應力松馳現象。The test result of the rene95 sample showed that the maximum ultimate tensile strength can be as high as 1400mpa and has reached 97. 9 % of that of the sample fabricated by powder metallurgy ( pm ). the plastic elongation of the test sample can even exceed that of pm. the ultimate tensile strength of the test sample grown from single crystal substrate has surpassed 6 % of that of grown from the stainless steel substrate, at the same time the plastic elongation surpassed 40 %
對成形試樣的力學性能測試結果表明,強度方面_ b最大為1400mpa ,已經達到了粉末冶金的97 . 9 ,塑性方面甚至超過了粉末冶金的水平;以單晶為基材的成形試樣其最大拉伸強度要比不銹鋼為基材的試樣高6 ,延伸率要高40 。By the analysis, it was found out that the key control factor determined the speed limit and storage energy was the poor transverse tension strength of the composites. therefore, if only fibers of high longitudinal tension strengths were used in the rim, high rotate speed and high energy storage density of flywheel rotor would not be achieved
經過理論推導及程序優化比較,發現,影響飛輪轉子極限轉速和儲能量的主要控制因素,恰好是其復合材料輪環較為薄弱的橫向拉伸強度,因此單純地通過採用高縱向拉伸強度的高強碳纖材料來製造飛輪轉子,並不能得到期望的高轉速和儲能密度。The calculated value of shear force model fit well with the experimental results. it means that compare to the tensile stress during squeeze flow the shear stress can be omitted especially when the molding rat e is low and distortion rate is low
拉伸粘度模型的計算結果與實驗結果吻合得相當好表明:在合模速率不大或變形率不是很大的情形下,擠壓流動過程中剪切力相對于拉伸應力可以忽略。Simultaneity, various single fiber strength tests ( sft ) and the single fiber fragmentation techniques were discussed, and the influence of fiber surface treatment on the single fiber strength and the interface load - transfer were discussed in detail. the two parameters weibull statistic theory was used to evaluate the scattering of the tensile strength test results of three types of single fibers with different surface treatments. the following conclusions can be drawn based on the analysis of the results
同時,文中詳細討論了單纖維強度測試實驗( sft )和單纖維復合材料斷裂實驗( sfc ) ,重點討論了纖維表面處理對單纖維拉伸強度和界面載荷傳遞能力的影響;採用兩參數weibull統計理論對經過三種不同表面處理的單纖維拉伸強度的測試結果的分散性進行了評價,獲得了理想的實驗結果;分析實驗結果可得到如下結論, sft實驗與sfc實驗獲得的界面剪切強度吻合良好;經過表面處理的玻璃纖維的界面粘結情況較未經處理的玻璃纖維好;經過表面處理的玻璃纖維的界面粘結強度和單纖維拉伸強度均高於未經表面處理的玻璃纖維。分享友人