改进的断裂力学残余特性模型

IF 0.6 4区 工程技术 Q4 MECHANICS Mechanika Pub Date : 2023-04-19 DOI:10.5755/j02.mech.31339
Goksel Saracoglu
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引用次数: 0

摘要

本文将基于递减指数函数的剩余性能模型的应用需求简化为只有一个力学试验数据。为此,通过在钝椭圆孔前使用Creager和Paris的弹性应力场方程,选择了尖端弯曲的理论半径,并确保尖端载荷方向上的最大应力等于断裂韧性。因此,通过使e-u函数中的u指数取决于几何校正因子和裂纹长度,减少了模型的工作量。将其应用于具有三点弯曲的层合复合材料试件和包括圆孔的试件,获得了接近实际值的临界断裂应力值。
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Modified Residual Property Model For Fracture Mechanics
In this paper, the application requirement of the Residual Property Model based on the decrescent exponential function is reduced to only one mechanical test data. For this, by using Creager and Paris's elastic stress field equation in front of the blunt elliptical hole, the theoretical radius was chosen for the tip curvative and the maximum stress in the load direction at the tip is ensured to be equal the fracture toughness. Thus, the workload of the model is reduced by making the u exponent in the e-u function dependent on the geometric correction factor and the crack length. It was applied to the laminated composite specimens with three-point bending and the specimens including circular hole, and critical fracture stress values close to actual values were achieved.
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来源期刊
Mechanika
Mechanika 物理-力学
CiteScore
1.30
自引率
0.00%
发文量
50
审稿时长
3 months
期刊介绍: The journal is publishing scientific papers dealing with the following problems: Mechanics of Solid Bodies; Mechanics of Fluids and Gases; Dynamics of Mechanical Systems; Design and Optimization of Mechanical Systems; Mechanical Technologies.
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