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Home >> News >>新聞動態 >> 測試材料伸長率爲什麽要用大變形延伸計測量？

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測試材料伸長率爲什麽要用大變形延伸計測量？

在橡膠、薄膜、樹脂、泡棉等産品的拉力測試中，需要測試産品的最大力，抗拉強度，伸長率等數據，目前市面上的機器配置還不能做到統一，在測量産品的數據上就會産生差異性，在測量過程中産生了差異性時候就需要熟悉各自的測試方法。

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目前很多廠家在測試伸長率的時候都會出現比較大的差異性，很多廠家的機器上也沒有安裝伸長率測量工具大變形延伸來測量，這是最直接導致數據差異的，下面思泰儀器爲您講解什麽是大變形延伸計和爲什麽要使用大變形延伸計來測量延伸率？

1，大變形延伸計是用于更能精確測量産品延伸率的一種測量治具，機器本身就是一個測試位移的傳感器，兩個彈簧夾持片將産品夾持住，拉力試驗機向上拉伸中拉斷産品，從而計算出伸長率。

2，在測量過程中我們都采用啞鈴型測試樣條，即是兩邊大中間測量是小的，如果不適用大變形延伸計測量爾直接拉斷，在這個過程中就把周邊寬度的也在拉伸範圍內，從而延伸率就會相對應的偏大，在使用大變形測量就是把上下夾具夾持在中間小條的樣品上，向上拉伸中大變形延伸計只會記錄中間的産品伸長，從而精確測量出産品的伸長率。

Last電子拉力試驗機出現異常震動、雜音、數據異常等故障的處理方法Next電子萬能拉力試驗機量程的選擇方法

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[Pg 73] They had a walk of several hours, and on their return to the hotel were quite weary enough to rest awhile. Frank and Fred had a whispered conversation while the Doctor was talking with an old acquaintance; and as soon as he was at liberty they told him what they had been conversing about. We leave the green fields far below; "One day a favorite lady of the emperor's palace persuaded the emperor to give the signal, to see how long it would take for the generals and the army to get to Pekin. He gave the signal, and the army came, but the generals were very angry when they found they had been called together just to amuse a woman. They went back to their homes, and the affair was supposed to be forgotten. Even in the character of the goods there was eloquence, and not a drollery in the scene, not even an ugliness, but was touched, was rife, with the woe of a war whose burning walls were falling in on us. And outward, too, upon others; a few up-ended cottonbales leaned against each other ragged and idle, while women and babes starved for want of them in far-away Lancaster. He was within easy range and was still trotting nearer. I snatched up my carbine, aimed, and then recovered, looking sharply to my left as if restrained by the command of some one behind the canes. The Federal's cool daring filled me with admiration. Had the foes he was looking for been actually in hiding here they could have picked him out of his saddle like a bird off a bush. His only chance was that they would not let themselves be teased into firing prematurely on any one man or six. Ferry beckoned me. I mounted and trotted down the woods side of the fence, at the same time the Federal's six men approached from three directions, and down the road the main column entered upon the scene. "She told us about it. And you needn't look so disturbed; she only praised you." "Part with it? Oh, not for the world beside!" XXXIX CHARLOTTE SINGS THE COMING OF THE CLOCKWORK MAN Rose considered. "That's not as good as making runs though." Bruce shut his teeth tightly and nodded. Still, in Prout's evidence he seemed to hear the voice of his judge passing sentence. But the Countess did not heed. Absolutely worn out in mind and body she had fainted. The woman's eyes flashed again. All this was taking time. Balmayne would wonder what had happened to her. From the bottom of her heart she was praying that he might come up and see. Not that there was much real hope of that--physical courage was not one of Louis Balmayne's strong points. In the use of hydraulic apparatus for transmitting and applying power, there is, however, this difficulty to be contended with: water is inelastic, and for the performance of irregular duty, there is a loss of power equal to the difference between the duty that a piston may perform and what it does perform; that is, the amount of water, and consequently the amount of power given off, is as the movement and volume of the water, instead of as the work done. The application of hydraulic machinery to the lifting and handling of weights will be further noticed in another place. At seven o'clock in the morning I was taken to the commanding officer, and was glad to see him again. He jumped up immediately and came to me with a charming smile, when I pointed to my escort and explained that I was a prisoner. "1. Commit a punishable offence mentioned in Clause 90 of the German Penal Code. They yelled and shouted and said that Bilsen and the whole district must be burned down, that the major was far too kind, that they were cowardly soldiers who hid themselves in houses and dared not fight an honest fight in the open, that civilians189 had also been shooting, and so on. I pointed out that the firing did not come from the house, but from the shrubbery near the house; that nobody could have seen a civilian shooting. As they insisted, I said with a laugh that they had seen ghosts. That excited them so, that they came on to me in a rage, and asked whether this was a laughing matter? And they would surely have used violence had not the sergeant intervened. The same, in self-same place, and by itself III. Here, as elsewhere, we shall employ the genetic method of investigation. Aristotle’s writings do not, indeed, present that gradual development of ideas which makes the Platonic Dialogues so interesting. Still they exhibit traces of such a development, and the most important among them seems to have been compiled from notes taken by the philosopher before his conclusions were definitely reasoned out, or worked up into a consistent whole. It is this fragmentary collection which, from having been placed by some unknown editor after the Physics, has received a name still associated with every kind of speculation that cannot be tested by a direct or indirect appeal to the evidence of external sense. IV. Holy Dêmêter’s fruit it gave them; the sweet spring Dear Daddy-Long-Legs, out from Bonnyrigg Four Corners. Amasai stayed up all night to I hope you appreciate the fact that this is a long letter from High on a hill, one with the rock, are built the temples, up to which is a flight of steps hewn in the stone itself. At every stage, or nearly, are little shrines with images of Ganesa, the elephant-headed god, or of Ananta, the sacred serpent, decked with flowers, the mindi flower, which has[Pg 108] a strong scent of pepper. In some places the whole temple, as vast as a cathedral, is hewn out of the hillside; the columns in elaborate and intricate patterns, the niches and altars wrought with inconceivable toil and patience, not a scrap added or stuck on. In the dim distance is a huge red statue of Siva, wreathed with flowers. CAWNPORE AT SEA The lines are as follows, and refer to a chateau then being built by Louis for the Marquise de [6] Pompadour, whose original name was Jeanne Antoinette Poisson: “I wonder who’s in it?” Dick mused as Jeff cut the gun and went into a glide, the better to get a look at the oncoming craft low over the seashore. Their own airplane had been headed south, down the coast. To their left, as they sped on, the lighthouse poked its tower out of the drifting, dispelling fog. The drone of an incoming airplane took them racing to the landing spot where Jeff came down to report that he had taken the unconscious seaplane pilot to a hospital where it was declared that he had a bad blow on his temple and might not recover his mental clearness for many days. The only reason Jeff would swing toward the water and give up working with the stick must be that the stick would not operate the elevators. “That wire, being twined around the other, makes me think it was added—after the first one was put in,” he declared. He watched her as she went out of the tent, and the surgeon and steward worked with the shining little instruments. To add to the fame of Frederick, news arrived that Marshal Lewald, with twenty thousand Prussians, had beaten the great horde of Russians at J?gerndorf, and driven them out of Prussia, with the single exception of Memel; that Lewald and Manteuffel had swept the Swedes out of Pomerania, taking three thousand prisoners; and that Prince Henry of Prussia and Prince Ferdinand of Brunswick, to whom Frederick, at the urgent request of England, had entrusted the command of the Hanoverian and Hessian troops which Cumberland had abandoned, had, with these very troops, driven the French from Lüneburg, Zell, and Hanover. These troops, it is true, were bound by the Convention of Closter-Seven not to fight again during the war; but the generals pleaded that the cruelties and rapacity of the French in Hanover were such as set aside all compacts. The Publishers. "But even if he does send them at once, they can't git here till evenin', and I hate powerfully to let him and the rest know that we didn't have sense enough to take care o' our victuals after we'd drawed 'em," said Si. "How, mad?" "Oh, will you?—Then I'll love you!" There was something in the depths of him that cried for her, something which had never moved or cried in him before. In spite of her lack of beauty and beguilement, in spite of her hostility to all his darling schemes, there was something in him to which Alice actually and utterly belonged. He did not understand it, he could not analyse it, he scarcely indeed realised it—all he felt was the huge upheaval, the conflict that it brought, all the shouting and the struggling of the desperate and motiveless craving that he felt for her—a hunger in him calling through days and nights, in spite of her insignificance, her aloofness, her silences, her antagonism. She had slid back to his knee, and the weight and warmth of her comforted him a little. He lifted his head quickly at her words. She flushed at his audacity. "No w?onder as she cudn't stick to him—hard, queer chap as he be." "I tell you, steward," said the smith who had before spoken, and stepping so near Calverley that he involuntarily drew back, "if you prize your life, you will call no man here a bondman. I am free—that man is free—" pointing to Holgrave, "and we are all free—all sworn brothers; and no one shall dare," raising his voice, "to brand, with such a name, a mother's son among us! You have received fair warning, and leave to go: retire now—instantly, if you are wise! Clear a passage there for my Lord de Boteler's steward! There is now room for you to pass—your retainers are waiting without—and now take the man you call a bondman, and away with you all. What! you will not lay hold of him? Take him, I say!" elevating his voice—"seize the villein, and drag him back to his bondage! What! not a finger, after all the trouble you have taken?—then, away with you alone!—away!" And Calverley, from the mere instinct of obedience to a superior power, moved towards the door. "And if ever," continued the smith, "you are found hunting in this forest again for bondmen, as you call them, we may chance to give you a lodging where you will have little reason to complain that the sun shines too brightly!"

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