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Modeling improved fatigue behavior of sugarcane fiber reinforced epoxy composite using novel treatment method

机译：用新的处理方法模拟改善甘蔗纤维增强环氧复合材料的疲劳行为

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摘要

The use of natural fiber composites in the fatigue prone structures is limited due to the lower strength and durability when compared to the carbon fiber reinforced polymer composites. The present work focuses on improving the bending cyclic fatigue strength (CFS) of the sugarcane fiber reinforced epoxy composite (SFRPC) by a novel treatment method. The treatment has increased up to 40% fatigue life of SFRPC by fiber and interface strengthening. The fatigue life was evaluated using the standard bending cyclic fatigue test. The SFRPCs were prepared using a specially designed compression molding setup by the hand layup method. The sugar cane fibers (SCF) were treated using the waste glass powder and PVA adhesive. The statistical analysis was conducted to observe the effect of the treatment method, the load ration (R) on CFS of treated/untreated SFRPC. A comparison of CFS of SFRPC (treated/untreated) with CFRPC is presented based on the author's previous work. A finite element based model was constituted for predicting the elastic properties of SFRPC (treated/untreated) at different fiber proportions. Additionally, a finite element (FE) model was constituted using the transient analysis in ANSYS (Explicit Dynamics Module) for obtaining the deformation and Von Mises stress at different R for the corresponding life of the treated/untreated SFRPC sample. A theoretical explanation for improved fatigue behavior of SFRPC was presented using scanning electron microscopy (SEM) micrographs and FE results collectively. The stress-strain-life relations for treated/untreated SFRPC were established. It was found that the shear yielding resulted due to the fracture of the outer glass layer of the SCF resulted in the higher CFS of the treated SERPC.
机译：由于与碳纤维增强的聚合物复合材料相比强度和耐用性较低，因此天然纤维复合材料在易疲劳结构中的使用受到限制。目前的工作集中在通过一种新颖的处理方法来改善甘蔗纤维增强环氧复合材料（SFRPC）的弯曲循环疲劳强度（CFS）。通过纤维和界面强化处理，SFRPC的疲劳寿命提高了40％。使用标准弯曲循环疲劳试验评估疲劳寿命。 SFRPC是使用特殊设计的压模装置通过手工铺层法制备的。使用废玻璃粉和PVA粘合剂处理了甘蔗纤维（SCF）。进行统计分析以观察处理方法，负载率（R）对已处理/未处理的SFRPC的CFS的影响。根据作者先前的工作，比较了SFRPC（已处理/未处理）和CFRPC的CFS。建立了基于有限元的模型，用于预测不同纤维比例下SFRPC（已处理/未处理）的弹性性能。此外，在ANSYS（显式动力学模块）中使用瞬态分析构建了一个有限元（FE）模型，以获取在相应R的处理后/未处理SFRPC样品寿命中不同R下的变形和Von Mises应力。使用扫描电子显微镜（SEM）显微照片和有限元分析结果共同提出了改善SFRPC疲劳行为的理论解释。建立了已处理/未处理的SFRPC的应力-应变-寿命关系。已经发现，由于SCF的外玻璃层的断裂而导致的剪切屈服导致了所处理的SERPC的更高的CFS。

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