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ASTM D6682-2008 用Peschl旋转分层剪切试验器测量粉末剪切应力的标准试验方法

ASTM D6682-2008 用Peschl旋转分层剪切试验器测量粉末剪切应力的标准试验方法

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【英文标准名称】: Standard Test Method for Measuring Shear Stresses of Powders Using Peschl Rotational Split Level Shear Tester
【原文标准名称】: 用Peschl旋转分层剪切试验器测量粉末剪切应力的标准试验方法
【标准号】: ASTM D6682-2008
【标准状态】: 现行
【国别】: 美国
【发布日期】: 2008
【实施或试行日期】:
【发布单位】: 美国材料与试验协会(US-ASTM)
【起草单位】: D18.24
【标准类型】: (Test Method)
【标准水平】: ()
【中文主题词】:
【英文主题词】: bulk density; bulk solids; cohesive strength; degradation; flowability; internal friction; Peschl shear tester; rotational shear tester; shear stress; wall friction; Bulk density; Cohesive strength; Degradation--environmental materials/applicatio
【摘要】: The test method is useful for the following: Classification of Powders8212;The cohesion and angle of internal friction are flowability indicators of powders and can be used to classify the powders. Quality Control8212;For a number of industrial applications flowability factors are used to compare the material flowability at different times during production. The material produced has to be held within given limits for each application and each powder so as to ensure trouble-free operation. Material Engineering8212;Powder properties are influenced by particle size, particle size distribution, fat content, humidity and other parameters. By selecting the correct parameters and the correct mixtures of powders, the required mechanical properties of the product are achieved. Design of Handling Equipment8212;For certain storage and conveyor equipment mathematical models exist which require the mechanical properties of powders. Note 28212;The quality of the result produced by this standard is dependent on the competence of personnel performing it, and the suitability of the equipment and facilities used. Agencies that meet the criteria of Practice D 3740 are generally considered capable of competent and objective testing/sampling/inspection/etc. Users of this standard are cautioned that compliance with Practice D 3740 does not in itself assure reliable results. Reliable results depend on many factors; Practice D 3740 provides a means of evaluating some of those factors. Practice D 3740 was developed for agencies engaged in the testing or inspection (or both) of soil and rock. As such it is not totally applicable to agencies performing this standard. However, users of this standard should recognize that the framework of Practice D 3740 is appropriate for evaluating the quality of an agency performing this standard. Currently there is no known qualifying national authority that inspects agencies that perform this standard.1.1 This test method is applied to the measurement of the mechanical properties of powders as a function of normal stress. 1.2 This apparatus is suitable measuring the properties of powders and other bulk solids, up to a particle size of 5000 micron. 1.3 This method comprises four different test procedures for the determination of powder mechanical properties: 1.3.1 Test A8212;Measurement of INTERNAL FRICTION as a function of normal stress. 1.3.2 Test B8212;Measurement of WALL FRICTION as a function of normal stress. 1.3.3 Test C8212;Measurement of BULK DENSITY as a function of normal stress and time. 1.3.4 Test D8212;Measurement of DEGRADATION as a function of normal stress. 1.4 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D 6026. 1.4.1 The procedures used to specify how data are collected/recorded or calculated in this standard are regarded as the industry standard. In addition, they are representative of the significant digits that generally should be retained. The procedures used do not consider material variation, purpose for obtaining the data, special purpose studies, or any considerations for the userx2019;s o......
【中国标准分类号】: H70
【国际标准分类号】: 77_160
【页数】: 13P.;A4
【正文语种】: 英语

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