STUDY ON THE TENSION-TENSION FATIGUE PROPERTIES OF T700/MTM46 COMPOSITE LAMINATES UNDER HIGH STRESS LEVEL

Abstract

Abstract: Tension-tension fatigue properties of T700/MTM46 composite laminates under high stress level were studied in this paper. Static tensile properties were investigated to obtain the ultimate tensile strength, modulus and failure strains. The static index has small scatter and the static failure modes are mainly characterized by the brittle fracture in a small region. Fatigue stress levels were determined by the ultimate tensile strength. Then the tension-tension fatigue tests were conducted. The scatter of fatigue life in each stress level is relatively large, which do not show clear trend with the change of the stress level. Fatigue failure modes of composite laminates are mainly serious delamination through the whole gauge length. The higher the stress level is, the more serious the stiffness decreases. Moreover, the normalized stiffness degradation curves exhibit three obvious stages characterized by "Quick-Slow-Quick" trend. The damages in fatigue loading initiate from 90° plies and show the most serious damage. Damages in 0° plies during fatigue loading appear latest. However, the fiber breakage in 0° plies indicates the coming catastrophic fatigue failure.

Key words: composite materials, fatigue, failure modes, stiffness degradation, damage evolution

CLC Number:

TB332

WANG Yu-qian, LIU Zhan, DU Jin-qiang. STUDY ON THE TENSION-TENSION FATIGUE PROPERTIES OF T700/MTM46 COMPOSITE LAMINATES UNDER HIGH STRESS LEVEL[J]. Fiber Reinforced Plastics/Composites, 2019, 0(4): 31-36.

References

[1] Liu X Y, Han K, Bai R X, et al. Buckling measurement and numerical analysis of M-type ribs stiffened composite panel. Thin-Walled Structures, 2014, 85: 117-124.
[2] Benoit L, Gabriel L, Luc R L, et al. Environmental effects on mode II fatigue delamination growth in an aerospace grade carbon/epoxy composite. Composites: Part A, 2012, 43: 475-485.
[3] 熊华峰. 复合材料疲劳分散性与强度分散性的关系. 南京: 南京航空航天大学, 2009.
[4] Jitendra S T, Ajit D K. Stiffness degradation model for biaxial braided composites under fatigue loading. Composites: Part B, 2008, 39: 548-55.
[5] Giancane S, Panella F W, Dattoma V. Characterization of fatigue damage in long fiber epoxy composite laminates. International Journal of Fatigue, 2010, 32: 46-53.
[6] Rosa G L, Risitano A. Thermographic methodology for rapid determination of the fatigue limit of materials and mechanical components. International Journal of Fatigue, 2000, 22: 65-73.
[7] Arief Yudhanto, Naoyuki Watanbe,Yutaka Iwahori, et al. Effect of stitch density on fatigue characteristics and damage mechanisms of stitched carbon/epoxy composites. Composites: Part A, 2014, 60: 52-65.
[8] 冯培峰, 王殿富, 杜善义, 等. 层合复合材料的疲劳剩余刚度统计分布模型. 应用力学学报, 2003, 20(3): 52-55.
[9] 冯培峰, 杜善义, 王殿富, 等. 层板复合材料的疲劳剩余刚度衰退模型. 固体力学学报, 2003, 24(1): 46-52.
[10] 张应福, 傅惠民, 黎观生. 评估复合材料安全寿命的低成本方法. 复合材料学报, 1999, 16(4):142-146.
[11] 姚卫星, 宗俊达, 廉伟. 监测复合材料结构剩余疲劳寿命的剩余刚度方法. 南京航空航天大学学报, 2012, 44(5): 678-673.
[12] 廉伟, 姚卫星. 复合材料层压板剩余刚度-剩余强度关联模型. 复合材料学报, 2008, 25(5): 151-156.
[13] Standard test method for tensile properties of polymer matrix composite materials: ASTM D3039/D3039M. 2012.
[14] Standard test method for tension-tension fatigue of polymer matrix composite materials: ASTM D3479/D3479M. 2012.
[15] Hodgkinson J M. Mechanical testing of advanced fibrecomposite. New York: Woodhead publishing, 2003.
[16] Haeberle J. Strength and failure mechanisms of carbon fibre-reinforced plastics under axial compression. London: London University, 1992.
[17] 陈传尧. 疲劳与断裂. 武汉: 华中科技大学出版社, 2002.
[18] Klesnil M. Fatigue of metallic materials. Elservier Scientific Pub, 1980.
[19] Fuchs H O, Stephens R I. Metal fatigue in engineering. New York: Wiley,1980.
[20] Harris B. Fatigue in composites. Cambridge: Woodhead Publishing Ltd., 2003.