Dynamic Mechanical Analysis (nano–DMA) on Banana and Pineapple fibres

The dynamic Mechanical Analysis (nano-DMA) test was conducted using a Hysitron TI 950 Triboindenter. The frequency-dependent nano-DMA test was conducted on Banana fibre and Pineapple fibre with a constant load of 1000 µN, superimposed with three different ramp loads 5 µN/s, 10 µN/s and 15 µN/s, by varying the frequency from 10 Hz to 250 Hz. The variation of complex modulus with frequency for the above loading conditions are presented, respectively, for banana and pineapple fibres. Similarly, the variation of damping with frequency is provided, respectively, for banana and pineapple fibres. Notable Findings: 1. It has been observed that complex modulus at three different ramp loads, 5 µN/s, 10 µN/s and 15 µN/s, is increasing corresponding to increase in frequency. 2. Damping coefficient at three different ramp loads is decreasing corresponding to increase in frequency.动态力学分析（nano-DMA）测试采用Hysitron TI 950摩擦纳米压痕仪完成。针对香蕉纤维与菠萝纤维开展频率相关的nano-DMA测试，测试过程中施加1000 µN的恒定载荷，并叠加5 µN/s、10 µN/s、15 µN/s三种不同的斜坡加载速率，测试频率范围设置为10 Hz至250 Hz。 针对上述加载条件下复数模量随频率的变化规律，分别给出了香蕉纤维与菠萝纤维的测试结果；同理，阻尼系数随频率的变化规律也分别对应香蕉纤维和菠萝纤维进行了呈现。 显著研究发现： 1. 观测表明，在5 µN/s、10 µN/s、15 µN/s三种斜坡加载速率下，复数模量均随频率升高而增大。 2. 三种斜坡加载速率下的阻尼系数均随频率升高而降低。