Shear characteristics of powder compact by using improved single shear test
Shear characteristics of powder compact by using improved single shear test
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使用改进的单剪切试验研究粉末压块的剪切特性
DOI：
10.1299/kikaic.70.2555
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
Zhr
中科院分区：
文献类型：
--
作者：
Y. Taniguchi;K. Dohda;Zhr
进行改进的单剪切试验来研究金属粉末压块的剪切特性。通过该实验过程，可以通过在具有各种法向应力的单个平面上剪切粉末压块来直接测量剪切面处的法向应力和剪切应力之间的关系。对铁粉和不锈钢粉进行了测试并研究了它们的剪切断裂。剪切特性通过临界标称摩擦系数和相对法向应力之间的近似关系来评估，其中相对法向应力由成形压力与法向应力之比导出。结果，剪切破坏平面处的临界标称摩擦系数随着压实密度的增加而增加，但它可以在不依赖于密度的情况下表达为相对法向应力的函数。因此，具有不同压坯密度的粉末压坯的剪切特性可以通过该近似来表示。
An improved single shear test is carried out to investigate shear characteristics of metal powder compact. By this experimental procedure, relation between the normal stress and shear stress at shear plane can be measured directly by shearing the powder compact at single plane with various normal stresses. Iron powder and stainless powder are tested and their shear fractures are investigated. Shear characteristics are evaluated by approximating relation between critical nominal friction coefficient and relative normal stress, where the relative normal stress is derived as the ratio with forming pressure and normal stress. As the result, the critical nominal friction coefficient at shear failure plane increases with increasing compact density, but it can be expressed without density dependence as a function of relative normal stress. Therefore the shear characteristics of powder compact with various compact densities can be expressed by this approximation.