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木材硬度的試驗機測試GB/T1941-2009

作者：來源：发布日期： 2020.10.19

信息摘要：

木材硬度的試驗機測試GB/T1941-2009

木材的靜力硬度試驗，按國標GB/T1941-2009要求，用于木材無疵小試樣面硬度的測定。使用試驗機來完成檢測。

木材具有抵抗其他剛體壓入的能力，用規定半徑的半球型鋼壓頭，在靜載荷下壓入木材以表示其硬度。

试样要求尺寸为70mm*50mm*50mm，长度为顺纹方向，试样支座要求和检查、试样含水率的调整，应分别负荷GB/T 1928-2009的规定。

將試樣放于試驗機支座上，以3~6mm/min的均勻速度將半球型鋼壓頭壓入試樣的試驗面，直至壓入5.64mm深爲止，載荷讀數精確至10N.對于加壓過程中易裂的試樣，半球型鋼壓頭的壓入深度允許減至2.82mm。

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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. 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