STUDY ON THE CROSS-SECTIONAL FLATTENING PHENOMENON OF GFRP PIPES

Abstract

Abstract: A method of classical structural mechanics is used to study the cross-sectional flattening phenomenon of pipes under pure bending. The formula for the cross-sectional flattening deformation is deduced and then verified by finite element analysis. The relationship between the transverse and longitudinal maximum bending stress of the pipe under pure bending is derived to guide the design of the GFRP pipe material to ensure that its longitudinal flexural strength can be fully utilized.

Key words: pipe, GFRP, cross-sectional flattening, longitudinal flexural strength, transverse flexural strength

CLC Number:

TB332

GENG Shuai. STUDY ON THE CROSS-SECTIONAL FLATTENING PHENOMENON OF GFRP PIPES[J]. Fiber Reinforced Plastics/Composites, 2019, 0(12): 43-46.

References

[1] Smallowitz H. Reshaping the future of plastic buildings[J]. Civil Engineering-ASCE, ASCE, 1985, 55(5): 38-41.
[2] Douthe C. Etude de structures élancéesprécontraintesenmatériaux composites, application à la comception des gridshells[D]. Ecole des PontsParisTech, 2007.
[3] Liao K, Schultheisz C R, Hunston D L. Effects of environmental aging on the properties of pultruded GFRP[J]. Composites Part B (Engineering), UK: Elsevier, 1999, 30B(5): 485-493.
[4] Nkurunziza G, Debaiky A, Cousin P, et al. Durability of GFRP bars: A critical review of the literature[J]. Progress in Structural Engineering and Materials, 2005, 7(4): 194-209.
[5] Khan F, Kim Y J. Time-dependent and residual behavior of pultruded GFRP beams subjected to sustained intensities and cold temperature[D]. Cold Regions Science and Technology, Netherlands: Elsevier, 2012, 74-75: 43-51.
[6] Sousa J M, Correia J R, Cabral-Fonseca S. Durability of glass fibre reinforced polymer pultruded profiles: comparison between QUV accelerated exposure and natural weathering in a mediterranean climate[J]. Experimental Techniques, 2016, 40(1): 207-219.
[7] Carra G, Carvelli V. Ageing of pultruded glass fibre reinforced polymer composites exposed to combined environmental agents[J]. Composite Structures, 2014, 108: 1019-1026.
[8] 朱海堂, 方高干, 孙丽萍. 纤维增强聚合物(FRP)耐久性能研究进展[J]. 玻璃钢/复合材料, 2009(2): 78-81, 86.
[9] 祁德庆, 钱文军, 薛伟辰. 土木工程用FRP 筋的耐久性研究进展[J]. 玻璃钢/复合材料, 2006(2): 47-50.
[10] 沈超, 周继凯, 徐飞飞, 等. 环境和应力对GFRP 筋耐久性影响的研究进展[J]. 低温建筑技术, 2014, 36(3): 3-6,22.
[11] Brazier L G. On the flexure of thin cylindrical shells and other "thin" sections[J]. Proceedings of the Royal Society of London. Series A, The Royal Society, 1927, 773(116): 104-114.
[12] 耿帅. 自然老化作用下GFRP管材耐久性研究[J]. 低温建筑技术, 2017, 39(9): 8-13.
[13] 马更生, 田雅琴, 黄庆学. 厚壁钢管压力矫直时的截面扁化计算[J]. 重型机械, 2012(2): 45-48.
[14] 朱革. 圆管弯曲的失效分析及其截面扁化、轴线伸长规律的研究[D]. 重庆: 重庆大学, 2000.
[15] 皇涛, 杨方方, 詹梅, 等. TA18高强钛管数控弯曲成形截面扁化研究(英文)[J]. 稀有金属材料与工程, 2018, 47(8): 2347-2352.
[16] 张子骞, 颜云辉, 杨会林. 基于Bazier效应的薄壁管材连续矫直截面变形研究[J]. 机械工程学报, 2015, 51(10): 62-68.
[17] 翟华, 李小慧, 赵彩暇, 等. 薄壁管件校直工艺中壁厚对截面扁化变形的影响[J]. 锻压装备与制造技术, 2013, 48(5): 78-80.
[18] 李小慧. 管件校直工艺对截面变形的影响[D]. 合肥: 合肥工业大学, 2013.
[19] 钟华勇, 翟华, 李玉宝. 锆合金薄壁管三点弯校直中的截面扁化[J]. 塑性工程学报, 2011, 18(4): 97-100.
[20] Lasn K. Evaluation of stiffness and damage of laminar composites[D]. Norwegian University of Science and Technology, 2015.