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公开(公告)号：US20050154540A1
公开(公告)日：2005-07-14
申请号：US10756298
申请日：2004-01-14
申请人： Dejun Ma , Chung-wo Ong
发明人： Dejun Ma , Chung-wo Ong
CPC分类号： G01N3/42 , G01N2203/0075 , G01N2203/008 , G01N2203/0212
摘要： Errors in current methods of determining elastic modulus through depth-sensing indentation may be resulted from three major factors: 1. error in estimating the projected contact area A(hc) by indirect means such as from the unloading curve, especially in the cases where “piling-up” occurs; 2. reliance on the use of the initial unloading slope Su, which in some cases is not easily determined reliably; and 3. insufficient consideration on the influences due to indenter bluntness in some important models based on numerical treatments. This invention provides a new method of determining elastic modulus of an indented material, which overcomes the above deficiencies. The maximum load and the total displacement of the indenter (to give a nominal hardness defined in this invention), elastic work and total work are measured. From these data, the reduced elastic modulus is thus determined through a set of function-like relationships established in this invention, which is then used to calculate the elastic modulus of the indented material.
摘要翻译： 目前通过深度感测压痕确定弹性模量的方法中的错误可能是由三个主要因素引起的：1.通过间接方式估计投影接触面积A（h C c）的误差，例如从卸载 特别是在“堆积”发生的情况下; 2.依赖使用初始卸载斜坡S ，这在某些情况下不容易确定; 并且在基于数值处理的一些重要模型中，对于压扁钝性的影响不足。 本发明提供了一种确定缩进材料的弹性模量的新方法，其克服了上述缺点。 测量压头（给出本发明中定义的标称硬度）的最大载荷和总位移量，弹性功和总功。 根据这些数据，通过本发明中建立的一组类似功能的关系来确定降低的弹性模量，然后将其用于计算缩进材料的弹性模量。
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公开(公告)号：US20220031736A1
公开(公告)日：2022-02-03
申请号：US17502105
申请日：2021-10-15
申请人： Dejun MA
发明人： Dejun MA , Xinqi CHEN , Feng HAN , Renjie YAN
摘要： Disclosed is a new medicinal use of anionic clay, and particularly to a use of anionic clay in preparing a lead-removing medicine. The described medicinal use of the anionic clay is capable of effectively preventing and treating lead poisoning and excessive lead, has significant lead-removing effects and little side effects, and has positive clinical significance.
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公开(公告)号：US07149634B2
公开(公告)日：2006-12-12
申请号：US10756298
申请日：2004-01-14
申请人： Dejun Ma , Chung-Wo Ong
发明人： Dejun Ma , Chung-Wo Ong
IPC分类号： G01L1/00
CPC分类号： G01N3/42 , G01N2203/0075 , G01N2203/008 , G01N2203/0212
摘要： A method and apparatus of determining an elastic modulus of a material having a Poisson's ratio v by a Berkovich indenter having an elastic modulus E; a Poisson's ratio v, and a cross sectional area A(h) as a function of depth are provided. The method and apparatus model the Berkovich indenter with a conical shape and a spherical cap.
摘要翻译： 通过具有弹性模量E的Berkovich压头确定具有泊松比v的材料的弹性模量的方法和装置; 提供泊松比v和作为深度的函数的横截面积A（h）。 该方法和设备对Berkovich压头进行了模拟，其具有圆锥形和球形盖。
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