Novel method for measurement of pipeline materials fracture resistance-examination on selective laser sintered cylindrical specimens

IF 1.4 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS

Science of Sintering Pub Date : 2022-01-01 DOI:10.2298/sos2203373t

Isaak Trajković, M. Milosevic, M. Travica, M. Rakin, G. Mladenović, L. Kudrjavceva, B. Medjo

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引用次数: 4

Abstract

This paper presents a part of development of a non-standard method for testing of cylindrical test specimens for measurement of fracture properties of pipeline materials. This method for testing of cylindrical structures working under pressure is based on determining of fracture mechanics parameters on SENT (Single Edge Notched Tension) specimens and new PRNT (Pipe Ring Notched Tension) specimens. In this work, both types of specimens required for this testing were manufactured from polyamide PA12 by using SLS (selective laser sintering) additive manufacturing method. Testing of the specimens is performed on the universal device for testing of mechanical properties of materials Shimadzu, AGS-X 100 kN. The tensile testing is accompanied by GOM Aramis 2M system, used for digital image correlation. By using these two systems, test results are obtained for ring-shaped and SENT specimens, including forces, displacements and fracture mechanics parameters CMOD (Crack Mouth Opening Displacement) and CTOD-?5 (Crack Tip Opening Displacement obtained by ?5 technique), as well as crack growth. Repeatability of this process, along with valid result consistency, represent the basis for further development of the new method, including the determining of energy-based fracture mechanics parameters: J integral and stress intensity factor.

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管道材料抗断裂性能测量新方法——选择性激光烧结圆柱形试样检测

本文介绍了用于管道材料断裂性能测量的圆柱形试样非标准测试方法的研制工作。这种测试圆柱形结构在压力下工作的方法是基于对SENT(单边缺口张力)试样和新PRNT(管环缺口张力)试样的断裂力学参数的确定。在这项工作中，测试所需的两种类型的样品都是通过SLS(选择性激光烧结)增材制造方法由聚酰胺PA12制成的。试样的测试在材料力学性能测试通用装置Shimadzu, AGS-X 100 kN上进行。拉伸试验采用GOM Aramis 2M系统，用于数字图像相关。利用这两种系统，获得了环形试件和SENT试件的受力、位移和断裂力学参数CMOD(裂纹张开位移)和CTOD-?5(裂纹尖端张开位移由?5技术得到)，以及裂纹扩展。该过程的可重复性以及有效结果的一致性为新方法的进一步发展奠定了基础，包括确定基于能量的断裂力学参数:J积分和应力强度因子。

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来源期刊

Science of Sintering 工程技术-材料科学：硅酸盐

CiteScore

2.50

自引率

46.70%

发文量

审稿时长

3.3 months

期刊介绍： Science of Sintering is a unique journal in the field of science and technology of sintering. Science of Sintering publishes papers on all aspects of theoretical and experimental studies, which can contribute to the better understanding of the behavior of powders and similar materials during consolidation processes. Emphasis is laid on those aspects of the science of materials that are concerned with the thermodynamics, kinetics and mechanism of sintering and related processes. In accordance with the significance of disperse materials for the sintering technology, papers dealing with the question of ultradisperse powders, tribochemical activation and catalysis are also published. Science of Sintering journal is published four times a year. Types of contribution: Original research papers, Review articles, Letters to Editor, Book reviews.