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公开(公告)号:KR1020090042001A
公开(公告)日:2009-04-29
申请号:KR1020070107838
申请日:2007-10-25
Applicant: 서강대학교산학협력단
CPC classification number: G01N3/42 , G01L5/0047 , G01N2203/0033 , G01N2203/0078
Abstract: An indentation test system for residual stress evaluation based on FEA solutions is provided to predict minute elastic residual stress by evaluating the residual stress with the coefficient of the Kicks law without the measurement of the size of a dent in case material properties are known. An indentation test system for residual stress evaluation based on FEA solutions comprises: a measure system measuring the signal to the displacement of the indentation load and dent of an indenter; and a materials detection part(220) in which the measurement signal is input from the measure system. In the materials detection part, an algorithm producing the residual stress by the inputted measurement signals is mounted. The residual stress output algorithm comprises: a step for calculating indentation constant without the residual stress; a step for calculating the indentation constant with the residual stress; and a step for calculating biaxial equivalence residual stress.
Abstract translation: 提供了一种基于FEA解决方案的残余应力评估的压痕测试系统,用于通过用Kicks法的系数评估残余应力,而不用在材料性质已知的情况下测量凹坑的尺寸来预测微小的弹性残余应力。 基于FEA解决方案的残余应力评估的压痕测试系统包括:测量压痕位移和压头凹陷的信号的测量系统; 以及其中从测量系统输入测量信号的材料检测部分(220)。 在材料检测部中,安装通过输入的测量信号产生残余应力的算法。 剩余应力输出算法包括:计算残余应力的压痕常数的步骤; 计算残余应力的压痕常数的步骤; 以及计算双轴等效残余应力的步骤。
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公开(公告)号:KR1020160088756A
公开(公告)日:2016-07-26
申请号:KR1020150008245
申请日:2015-01-16
Applicant: 서강대학교산학협력단
CPC classification number: G01N3/42 , G01N2203/0062 , G01N2203/0078 , G06F17/10
Abstract: 본발명은 Hyun 등이제시한비경화재에대한기존평각식을활용함으로써적은횟수의해석으로졍화재의파괴인성을측정할유한요소해에기초한경화재의비커스압입파괴인성평가방법을제공하는것이그 기술적과제이다. 이를위해, 본발명의유한요소해에기초한경화재의비커스압입파괴인성평가방법은, 상기경화재를영률과푸아송비가같고항복변형률만다른비경화재로가정하는단계; 상기경화재의항복변형률과변형경화지수로부터상기비경화재의수정항복변형률을얻는함수식을제시하는단계; 및상기함수식에서얻은상기비경화재의수정항복변형률을이용하여상기비커스압입자에의해상기경화재에미치는압입하중과상기경화재에발생되는균열길이로부터상기경화재의파괴인성을평가하는단계를포함한다.
Abstract translation: 本发明涉及一种基于有限元解决方案评价维氏压痕断裂韧性的方法,所述有限元解决方案通过利用常规的直角公式来测量硬化剂中的断裂韧性,其中,所述非硬化剂由 铉等。 为了实现这一点,基于有限元解决方案评估维氏硬度剂中维氏压痕断裂韧性的方法包括:假定固化剂是具有与硬化剂相同的杨氏模量和泊松比的非硬化剂的步骤 并且具有与硬化剂不同的屈服应变速率; 提出功能公式从屈服应变率获得非硬化剂的改性屈服应变速率和硬化剂的应变硬化指数的步骤; 以及通过维氏压头对硬化剂上的压痕负荷和硬化剂中产生的裂纹长度来评价硬化剂中的断裂韧性的步骤,使用由功能式得到的非硬化剂的改性屈服应变速率。
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