Lokesh K S, Ramachandra C G, Mayya D Shrinivasa, Varuna T, Kanti Praveen Kumar, Kumar Abhinav, Regasa Melkamu Biyana
Srinivas Institute of Technology, Mangalore, Karnataka, India.
Presidency University, Bangalore, Karnataka, India.
PLoS One. 2025 Jun 9;20(6):e0322208. doi: 10.1371/journal.pone.0322208. eCollection 2025.
Fibre reinforced plastics are predominantly used in automotive, aerospace applications due to their promising features of low cost, easy of processing and durability, however these composites are more susceptible to varied temperature conditions under different loading conditions. One such problem where these composites vary greatly in their performance is due to impact loading conditions. The objective of present research is to determine the effect of calcium inosilicate (also termed as wollastonite) powder which is used as a filler on low velocity impact (LVI) behaviour of bi-directional glass fibre reinforced with epoxy thermosets (GFRP) for different loading percentage of 1%,3%,5% and 7%. Composites were prepared through manual lay-up route and prepared samples were exposed for 3 different temperature conditions of continuous heating and cooling cycles at +500c, -50C including room temperature conditions for 168hrs. Aged samples were tested for low velocity impact(LVI) testing by keeping constant energy of 30J. Results revealed that addition up to 3% filler influence largely on LVI response of GFRP composites for all the temperature conditions, addition to this polynomial regression of 9th order was performed and the results were best fit with experimental values. Fractography study revealed the severity of damage modes upon LVI testing.
纤维增强塑料由于其低成本、易于加工和耐用性等优良特性，主要应用于汽车和航空航天领域。然而，这些复合材料在不同加载条件下更容易受到不同温度条件的影响。这些复合材料性能差异很大的一个问题是由于冲击加载条件。本研究的目的是确定用作填料的硅酸钙（也称为硅灰石）粉末对双向玻璃纤维增强环氧热固性塑料（GFRP）在1%、3%、5%和7%不同加载百分比下的低速冲击（LVI）行为的影响。复合材料通过手工铺层工艺制备，制备的样品在+50℃、-50℃的连续加热和冷却循环以及室温条件下暴露168小时，共3种不同温度条件。对老化后的样品进行低速冲击（LVI）测试，保持能量恒定为30J。结果表明，在所有温度条件下，添加高达3%的填料对GFRP复合材料的LVI响应有很大影响，此外还进行了九阶多项式回归，结果与实验值拟合良好。断口分析研究揭示了LVI测试时损伤模式的严重程度。
