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警用防刺服的准靜態抗穿刺試驗機測試

作者：來源：发布日期： 2020.11.04

信息摘要：

警用防刺服的准靜態抗穿刺試驗機測試,深圳大學化學系曾提交一種警用防刺服平紋織物材料，需定制夾具進行穿刺試驗，以求取最大力、應力應變曲線，以便對材料各項性能做進一步分析研究。

深圳大學化學系曾提交一種警用防刺服平紋織物材料，需定制夾具進行穿刺試驗，以求取最大力、應力應變曲線，以便對材料各項性能做進一步分析研究。

這種警用防刺服材料是超高分子量聚乙烯UHMWPE，這是一種抗沖擊性能極佳的高強高模纖維，兼具低密度的優勢，被廣泛地用于制作防彈防刺服、擊劍服、漁網等功能性材料。

利用标准GA 68—2008《警用防刺服》中规定的测试刀具，参照ASTM Standard F1790-05和ISO Standard 13997对试样进行准静态穿刺试验。在三思泰捷萬能試驗機上对UHMWPE织物试样进行准静态刺破实验，刺破过程尽量均匀缓慢，以保证各时刻冲击系统的状态接近平衡态。用自制的正方形夹具夹住布样，实验前将刀头下降到与布样表面刚好接触，布样有效受力范围为8 cm×8 cm，设置实验过程中刀具下降速度为10 mm/min后开始实验，得到刀具的典型刺破力曲线。如图：

並使用顯微鏡對織物的損傷情況進行觀察，結合試驗數據分析處理方式對損傷形式的影響，以及因此對抗穿刺性能的影響。

我國在警用及軍用防護材料方面的研究已經邁入了快車道，這極大提升了相關領域的戰力，進而保障了國家安全。

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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. The manner in which he did this is289 characteristic of his singular gentleness and unwillingness to give offence. It was understood that the choice must lie between his two most distinguished pupils, Theophrastus of Lesbos, and Eudêmus of Rhodes. Aristotle asked for specimens of the wine grown in those islands. He first essayed the Rhodian vintage, and praised it highly, but remarked after tasting the other, ‘The Lesbian is sweeter,’ thus revealing his preference for Theophrastus, who accordingly reigned over the Lyceum in his stead.179 Abibulla saw them off with great deference and a contrite air, and watched their retreat; then, as[Pg 260] I was about to send him to despatch the message, he was indignant. The police! What could they do to a sahib like me? It was all very well to frighten poor folks—it was a sin to waste money in asking for a reply which I should never be called upon to show—and so he went on, till I made up my mind to think no more of the matter. 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