Finite element modeling of pulse phase thermography of an approximate model of low velocity impact induced damage in carbon fiber reinforced polymer structures

2019 ◽  
Author(s):  
Saul H. Valle ◽  
Kara J. Peters
Keyword(s):  
Finite Element ◽  
Carbon Fiber ◽  
Finite Element Modeling ◽  
Approximate Model ◽  
Fiber Reinforced Polymer ◽  
Low Velocity Impact ◽  
Carbon Fiber Reinforced Polymer ◽  
Low Velocity ◽  
Velocity Impact ◽  
Reinforced Polymer

EXPERIMENTAL ANALYSIS OF LOW VELOCITY IMPACT NEAR THE BVID LIMIT ON CARBON FIBER REINFORCED POLYMER PANELS

2021 ◽  
Author(s):  
ANDREW SEAMONE ◽  
ANTHONY M. WAAS ◽  
PAUL DAVIDSON ◽  
VIPUL RANATUNGA
Keyword(s):  
Carbon Fiber ◽  
Impact Damage ◽  
Fiber Reinforced Polymer ◽  
Low Velocity Impact ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Low Velocity ◽  
Velocity Impact ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced

As carbon fiber reinforced polymer matrix panels (CFRP) are increasingly being used in aircraft due to their advantages in strength and weight, it is necessary to understand their durability. In this study, a detailed analysis of critical events during low velocity impact (LVI) will be presented as well as initial compression after impact (CAI) results. Two CFRP layups of 16 and 24 plies are impacted with varying impact energies below and near the barely visible impact damage (BVID) limit. The panels are subsequently compressed in the transverse direction in order to quantify the strength knockdown from pristine panels to damaged ones. The sequence of failure initiation, delamination initiation, and subsequent delamination pattern was identified. The sequence is critical to predictive modeling of failure and failure progression of CFRP composites.

Influence of low-velocity impact-induced delamination on electrical resistance in carbon fiber-reinforced composite laminates

2018 ◽  
Vol 52 (25) ◽  
pp. 3461-3470 ◽  
Author(s):  
Robert J Hart ◽  
OI Zhupanska
Keyword(s):  
Finite Element ◽  
Carbon Fiber ◽  
Electrical Resistance ◽  
Low Velocity Impact ◽  
Finite Element Models ◽  
Fiber Reinforced ◽  
Low Velocity ◽  
Velocity Impact ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced

In this paper, experiments have been performed and finite element models have been developed for studying the influence of low-velocity impact damage on the four-probe electrical resistance of carbon fiber-reinforced polymer matrix laminates. Sixteen-ply and 32-ply AS4/3501-6 laminates with quasi-isotropic layup were analyzed. Electrical resistance was evaluated using a four-step procedure. First, finite element models were created in Abaqus Finite Element Analysis (FEA) for simulating low-velocity impact using a quasi-static loading approach. Second, matrix rupture in the inside plies was evaluated, and delamination analysis was performed at the corresponding interfaces to determine delamination patterns. Third, four-probe electrical finite element models were developed in Abaqus FEA for specimens before and after impact using the concept of effective conducting thickness and the delamination patterns obtained from the delamination analysis. Effects of the low-velocity impact delamination on four-probe top and oblique electrical resistance were studied. Electrical resistance predictions were compared to the experimental data. Both top and oblique resistance planes were sensitive to presence of delamination with the oblique resistance measurement being more sensitive as compared to the top resistance measurement. In addition, the resistance of the 16-ply specimens was more greatly affected by the delamination compared to the 32-ply specimens. The proposed analysis can be utilized for design of carbon fiber-reinforced polymer matrix composites with optimized damage sensing capabilities.

Sign in / Sign up

Export Citation Format

Share Document