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?GB/T1452-2005夾層結構試驗機平拉測試

作者：來源：发布日期： 2020.10.20

信息摘要：

?GB/T1452-2005夾層結構試驗機平拉測試

夹层结构，是一种由高强度的蒙皮表层与轻质芯材组成的结构材料。常见的有泡沫夹层结构、波板夹层结构、蜂窝夹层结构等，面层采用有金屬、玻璃钢、绝缘纸、胶合板、塑料板等材质。夹层结构被广泛应用于军事、航空工业、船舶、车辆、建筑、轻工、交通灯领域。

夾層結構的力學性能，直接關系到材料的使用性能，國標GB/T1452~1457就是有關夾層結構力學性能檢測的方法。

GB/T1452修改采用了美国ASTM C297-94《夹层结构平拉强度的标准试验方法》标准，由上海玻璃钢研究所负责起草。最新版为2005年修订。

GB/T1452-2005適用于測定夾層結構中芯子平拉強度與面板與芯子膠接的平拉強度。使用拉力試驗機來完成測試。

通過帶有萬向節的專用拉伸夾具在垂直夾層結構面板方向施加拉伸載荷，發生芯子拉伸破壞，或面板與芯子間膠接拉伸破壞，從而測定抗拉性能參數。

帶有萬向節拉伸夾具示意圖見圖：

試驗機加載速度爲1~2mm/min。

平拉試樣組合件的效果如圖：

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The Curate, of course, had heard nothing about the Clockwork man's other performances; he had scarcely heeded the hints thrown out about the possibility of movement in other dimensions. It seemed to him, in the uncertain light of their surroundings, that the Clockwork man's right arm gradually disappeared into space. There was no arm there at all. Afterwards, he remembered a brief moment when the arm had begun to grow vague and transparent; it was moving very rapidly, in some direction, neither up nor down, nor this way or that, but along some shadowy plane. Then it went into nothing, evaporated from view. And just as suddenly, it swung back into the plane of the curate's vision, and the hand at the end of it grasped a silk hat. Good fitting is often not so much a question of skill as of the standard which a workman has fixed in his mind, and to which all that he does will more or less conform. If this standard is one of exactness and precision, all that is performed, whether it be filing, turning, planing, or drawing, will come to this standard. This faculty of mind can be defined no further than to say that it is an aversion to whatever is imperfect, and a love for what [171] is exact and precise. There is no faculty which has so much to do with success in mechanical pursuits, nor is there any trait more susceptible of cultivation. Methodical exactness, reasoning, and persistence are the powers which lead to proficiency in engineering pursuits. I was the only civilian in that road, and the soldiers, with much curiosity, stared at me. Whenever I noticed an officer, I gave an elaborate military salute, and with such an air that the officers, although hesitating at first, did not fail to return the salute. The reformed system of education was to be not only moral and religious but also severely scientific. The place given to mathematics as the foundation of a right intellectual training is most remarkable, and shows how truly Plato apprehended the conditions under which knowledge is acquired and enlarged. Here, as in other respects, he is, more even than Aristotle, the precursor of Auguste Comte. He arranges the mathematical sciences, so far as they then existed, in their logical order; and his remarks on the most general ideas suggested by astronomy read like a divination of rational mechanics. That a recommendation of such studies should be put into the mouth of Socrates is a striking incongruity. The older Plato grew the farther he seems to have advanced from the humanist to the naturalistic point of view; and, had he been willing to confess it, Hippias and Prodicus were the teachers with whom he finally found himself most in sympathy. We are told that when his end began to approach, the dying philosopher was pressed to choose a successor in the headship of the School. 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