Low-velocity impact and residual flexural behaviors of 2.5-D woven composite under accelerated thermal ageing: Experiment and numerical modelling

Abstract

This paper aims to investigate the thermal ageing effect on the impact and post-impact behaviors of 2.5-D woven composites. A combined experimental and numerical study is carried out over a range of impact energies with the subsequent residual flexural tests on both aged (in the air for 32 days at 180℃) and pristine samples. Low-velocity impact tests are performed to assess the degradation of impact-resistant ability in terms of energy absorption mechanism and failure modes. Subsequently, three-point bending tests are conducted to determine the post-impact behaviors with respect to strain concentration, stress transfer and damage evolution process. The strain fields in the finite element model are compared with experimental results obtained by the DIC method. A larger strain concentration area could be found at higher energy levels and longer ageing time. Extended impact damage, such as fiber breakage and delamination, plays an important role in load transfer process in post-impact behavior, thus leading to the decrease of residual stress in aged samples.

Mechanical behavior of sandwich panels with hybrid face sheets and embedded super-elastic SMA wires under quasi-static loading: An experimental investigation

“…The experiments were performed at the composite laboratory of the Faculty of Mechanical Engineering, Amirkabir University of Iran. As presented in Figure 5, the tip of the indentor was semi-spherical with 16 mm in diameter (Cao et al., 2020) and the samples were fully clamped and the effective surface area of ​​the samples under the loading was 60 × 60 mm 2 . After loading, the contact force-displacement curves, as the output (Figure 5), were transmitted to the computer connected to the device via the controller.…”

A novel synergistic multi-scale modeling framework to predict micro- and meso-scale damage behaviors of 2D triaxially braided composite

“…Textile composites exhibit preferable mechanical performances, such as higher specific stiffness/ strength, impact resistance, energy-absorption, etc., as compared with traditional unidirectional laminates (Abtew et al, 2019;Cao et al, 2020;Jiang et al, 2021;Wei et al, 2020;Zhang et al, 2020). Hence, textile composites show greater application potential in aerospace and automotive industry (Jiang et al, 2020;Littell, 2008;Ren et al, 2019;Zhang et al, 2017).…”

Strain-rate-dependent progressive damage modelling of UHMWPE composite laminate subjected to impact loading

“…Damage to composite layers under impact load cannot be modeled using common elements in ABAQUS software whose failure criterion is based on the Tsai-Wu criteria. Many researchers have modeled the low velocity (Cao et al., 2019; Farooq and Myler, 2016) and the high velocity impact (Bandaru and Ahmad, 2016; Jiang et al., 2018; Zhang et al., 2020) using ABAQUS software by writing subroutines based on the Hashin’s criterion and CDM. Under impact loading, the strain rate has a significant effect on the material property of the composite laminates.…”