Subcritical damage mechanisms of bolted joints in CFRP composite laminates

2013 ◽  
Vol 54 ◽  
pp. 20-27 ◽  
Author(s):  
A. Ataş ◽  
C. Soutis
Keyword(s):  
Composite Laminates ◽  
Bolted Joints ◽  
Damage Mechanisms ◽  
Cfrp Composite

scholarly journals Estimation of the Dissipative Heat Sources Related to the Total Energy Input of a CFRP Composite by Using the Second Amplitude Harmonic of the Thermal Signal

Materials ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 2820
Author(s):  
Rosa De Finis ◽  
Davide Palumbo
Keyword(s):  
Total Energy ◽  
Composite Laminates ◽  
Energy Input ◽  
Fatigue Behaviour ◽  
Damage Mechanisms ◽  
Dissipative Heat ◽  
Thermal Signal ◽  
Total Energy Input ◽  
Cfrp Composite ◽  
Isotropic Carbon

Theories for predicting the fatigue behaviour of composite laminates often make strong assumptions on the damage mechanisms that strongly depend on the designed laminate lay-up. In this regard, several physical and empirical models were proposed in the literature that generally require experimental validations. The experimental techniques, such as thermography, also provide useful tools for monitoring the behaviour of the specific material so, that they can be used to support the study of the damage mechanisms of materials. In this research, the second amplitude harmonic of the thermal signal has been investigated and used to assess the relationship with the total energy input in order to estimate the fatigue strength of the material. A thermal index was assessed by monitoring the constant amplitude tests (S/N curve) that were performed on a quasi-isotropic carbon fibre reinforced polymer (CFRP) laminate obtained by the automated fibre placement process. The obtained results demonstrated the capability of the second amplitude harmonic of the thermal signal to describe and monitor the fatigue damage.

Analysis and modelling of cutting forces during the trimming of unidirectional CFRP composite laminates

2012 ◽  
Vol 12 (4) ◽  
pp. 337 ◽  
Author(s):  
Imed Zaghbani ◽  
Jean Francois Chatelain ◽  
Sébastien Berube ◽  
Victor Songmene ◽  
Justin Lance
Keyword(s):  
Cutting Forces ◽  
Composite Laminates ◽  
Cfrp Composite

Interlaminar Damage Behavior of CFRP Composite Laminates under Cyclic Shear Loading Conditions

2015 ◽  
Vol 1125 ◽  
pp. 121-125 ◽  
Author(s):  
Muhammad A'imullah Abdullah ◽  
Mohammad Reza Arjmandi ◽  
Seyed Saeid Rahimian Koloor ◽  
King Jye Wong ◽  
Mohd Nasir Tamin
Keyword(s):  
Composite Laminates ◽  
Quantitative Description ◽  
Shear Loading ◽  
Zone Model ◽  
Fe Model ◽  
Critical Energy Release Rate ◽  
Cyclic Shear ◽  
Load Amplitude ◽  
Cfrp Composite ◽  
Interlaminar Damage

This paper provides quantitative description of interlaminar damage process in CFRP composite laminates under cyclic shear loading. Quasi-static end-notched flexural (ENF) test on 16-ply CFRP composite laminate beam, [0]16 and its complementary validated FE model provide the reference “no-interlaminar damage” condition. Two identical ENF samples were fatigue to 50000 cycles, but at different load amplitude of 90 and 180 N, respectively (Load ratio, R = 0.1) to induce selectively property degradation at the interface crack front region. Subsequent quasi-static ENF tests establish the characteristic of the interlaminar damage degradation. The residual peak load for the fatigued ENF samples is measured at 1048 and 914 N for the load amplitude of 90 and 180 N, respectively. Cyclic interlaminar shear damage is represented by a linear degradation of the residual critical energy release rate, GIIC with the accumulated damage. Reasonably close comparisons of the predicted residual load-displacement responses with measured curves serve to verify the suitability of the assumed bilinear traction-separation law for the cyclic cohesive zone model (CCZM) used.

Effects of temperature on impact damages in CFRP composite laminates

2001 ◽  
Vol 32 (8) ◽  
pp. 669-682 ◽  
Author(s):  
Kwang-Hee Im ◽  
Cheon-Seok Cha ◽  
Sun-Kyu Kim ◽  
In-Young Yang
Keyword(s):  
Composite Laminates ◽  
Cfrp Composite ◽  
Effects Of Temperature ◽  
Impact Damages
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