THE SHORTER TIME PREDICTION METHOD OF LONG-TERM PROPERTY OF GFRP PIPES

Abstract

Abstract: The certification of glass-fiber reinforced plastic (GFRP) piping systems is regulated by normative standards in which test series of 10,000 h are needed to predict the residual property of the expected life (normally, 50 years). In this paper, the 1-4-4 combined optimal scheme for prediction of long-term property of GFRP pipe is proposed. This system involves using orthogonal design and test schemes lasting under 10,000 h. Experimental results for long-term ring-bending strain (S_b) of GFRP pipes from the standard test procedure indicate that this system is practical and effective. The estimation error when using the proposed method was consistently less than 5.24% as compared to the standard method.

Key words: GFRP pipes, prediction of long-term property, log-log regression model, optimal scheme, the shorter time prediction

CLC Number:

TB332

LIANG Na, ZHU Si-rong, CHEN Jian-zhong. THE SHORTER TIME PREDICTION METHOD OF LONG-TERM PROPERTY OF GFRP PIPES[J]. Fiber Reinforced Plastics/Composites.

References

[1] 陈建中, 朱四荣. 时间相关的聚合物基复合材料失效准则[J]. 航空制造技术, 2013, 23(24): 89-91.
[2] 朱四荣, 黄千稳, 陈建中. 恒载条件下玻璃钢长期性能的研究[J]. 玻璃钢/复合材料, 2014(4): 72-75.
[3] American Society for Testing and Materials. Standard Test Method for Long-Term Ring-Bending Strain of "Fiberglass" Pipe: ASTM D5365[S]. United States: ATM Publishing service, 2006.
[4] International Organization for Standardization. Plastics piping systems--Glass-reinforced thermosetting plastics (GRP) pipes and fittings--Methods for regression analysis and their use: ISO 10928:2009[S]. Switzerland: IS Publishing service, 2009.
[5] M. Farshad. Determination of the long-term hydrostatic strength of multilayer pipes[J]. Polymer testing, 2005, 24(8): 1041-1048.
[6] 朱四荣, 梁娜, 李悦, 等. 玻璃钢管的长期刚度测量及预测[J]. 复合材料学报, 2016, 33(3): 112-119.
[7] Hugo Faria, R.M. Guedes. Long-term behavior of GFRP pipes: Reducing the prediction test duration[J].Polymer Testing, 2010, 29(3): 337-345.
[8] Rui Miranda Guedes. On the prediction of long-term creep-failure of GRP pipes in aqueous environment[J]. Polymer Composites, 2010, 31(6): 1047-1055.
[9] Krastev R K, Zachariev G, Hristova J, et al. Creep-rupture strength prediction of an epoxy composite under tension[J]. Mechanics of time-dependent materials, 2009, 13: 207-214.
[10] Krastev R K, Djoumaliisky S, Borovanska I. Long-Term Strength of Polymer Blends from Recycled Materials[J]. Journal of Theoretical and Applied Mechanics, 2013, 43(3): 59-66.
[11] Miyano Y, Nakada M, Ichimura J, et al. Accelerated testing for long-term strength of innovative CFRP laminates for marine use[J]. Composites Part B: Engineering, 2008, 39(1): 5-12.
[12] Koyanagi J, Nakada M, Miyano Y. Tensile strength at elevated temperature and its applicability as an accelerated testing methodol-ogy for unidirectional composites[J]. Mechanics of Time-Dependent Materials, 2012, 16(1): 19-30.
[13] Melo J D D, de Medeiros A M. Long-term creep-rupture failure en-velope of epoxy[J]. Mechanics of Time-Dependent Materials, 2013: 1-9.
[14] 于海成, 崔红, 韩非, 等. 基于Larson-miller参数的P92材料持久强度的数学模型及其验证[J]. 兵器材料科学与工程, 2015, 38(3): 38-39.
[15] 梁娜, 朱四荣, 陈建中, 等. GFRP管力学长期性能快速预测的回归优化方法[J]. 华中科技大学学报, 2016, 44(8): 128-132.