scholarly journals Damage accumulation in braided textiles-reinforced composites under repeated impacts: Experimental and numerical studies

2018 ◽  
Vol 204 ◽  
pp. 256-267 ◽  
Author(s):  
Chen Wang ◽  
Zhong Chen ◽  
Vadim V. Silberschmidt ◽  
Anish Roy
Keyword(s):  
Damage Accumulation ◽  
Reinforced Composites ◽  
Numerical Studies ◽  
Repeated Impacts

Numerical Studies of the Correlation between Inclusion Shape and Effective Elastic Properties of the Particle Reinforced Composites

2019 ◽  
Vol 827 ◽  
pp. 234-239
Author(s):  
Romana Piat ◽  
Pascal A. Happ
Keyword(s):  
Material Properties ◽  
Three Dimensional ◽  
Reinforced Composites ◽  
Two Phase ◽  
Smooth Structures ◽  
Irregular Shapes ◽  
Numerical Studies ◽  
Effective Material Properties ◽  
Particle Reinforced Composites ◽  
Inclusion Shape

In present paper the effect of inclusions with irregular shapes on the elastic material properties of two-phase composites is studied. The irregular shapes of the real inclusions were approximated using smooth three-dimensional structures. For this needs the images of the microscopic particles were numerically approximated through smooth structures using methods of the computer algebra and were used for the following FE studies. The reference elements with typical inclusions with irregular shapes were determined and used for calculation of the effective material properties.

scholarly journals Effect of thickness on the damage tolerance of glass/epoxy laminates subject to repeated impacts

2017 ◽  
Vol 232 (8) ◽  
pp. 1363-1373 ◽  
Author(s):  
Davide S Paolino ◽  
Maria Pia Cavatorta ◽  
Giovanni Belingardi
Keyword(s):  
Damage Accumulation ◽  
Damage Tolerance ◽  
Damage Index ◽  
Impact Response ◽  
Repeated Impact ◽  
Transverse Cracking ◽  
Accumulation Phase ◽  
Repeated Impacts ◽  
Laminate Thickness ◽  
Extended Area

To evaluate the influence of layer and laminate thickness on the repeated impact response of E-glass/epoxy laminates, two types of cross-ply stacking sequences ([0/90]3n and [03/903]n), with two different thicknesses (4 mm and 8 mm), were analyzed. The investigation, led by running quasi-static perforation tests and repeated impact tests, outlined the better performance of [03/903]n laminates. Experimental results were analyzed through a macroscopic damage variable (damage index DI) and by microscopic observation and digitalized profiles of impacted specimens. The higher damage tolerance of [03/903]n laminates was found to depend on the capability of spreading the damage over a more extended area and of tolerating a higher permanent deflection. For both laminate types, the end of the steady damage accumulation phase was observed to correspond to through-thickness transverse cracking.

Numerical Studies on Dynamic Behavior of Tubular Pipes Under Repeated Impacts

2020 ◽  
Author(s):  
Ling Zhu ◽  
Xiangui Wang ◽  
Kailing Guo ◽  
Bin Ma
Keyword(s):  
Numerical Simulation ◽  
Plastic Deformation ◽  
Dynamic Behavior ◽  
Deformation Energy ◽  
Repeated Impact ◽  
Numerical Studies ◽  
Repeated Impacts ◽  
The Impact ◽  
Local Dent ◽  
Good Agreement

Abstract The tubular pipes of Jacket platform may be frequently subjected to repeated impact loadings from vessels and dropped objects during the operation life, which may lead to serious damages to the platform. In this paper, the numerical studies on dynamic behavior of tubular pipe subjected to repeated impact loadings was performed. The deformation profile and permanent deflection in numerical simulation were compared with those in experiment, and good agreement was achieved. Besides, the mechanism of deformation accumulation and energy absorption were analyzed. Results showed that, the tubular pipe mainly produced transverse expanding and local dent, the global bending was very small. The permanent deflection at the middle of the pipe increased as the impact numbers increased, while the increment decreased. In addition, with the increase of impact number, the elastic deformation energy stored by the tubular pipe increased, and the plastic deformation energy decreased.

Sign in / Sign up

Export Citation Format

Share Document