Energy absorption and damage mechanisms in progressive crushing of corrugated NCF laminates: Fractographic analysis

2014 ◽  
Vol 110 ◽  
pp. 110-117 ◽  
Author(s):  
L. Grauers ◽  
R. Olsson ◽  
R. Gutkin
Keyword(s):  
Energy Absorption ◽  
Fractographic Analysis ◽  
Damage Mechanisms

Damage mechanisms and energy absorption of aluminosilicate glass under compression/tensile loading

2021 ◽  
Vol 288 ◽  
pp. 123088
Author(s):  
Muhammad Zakir Sheikh ◽  
Muhammad Atif ◽  
Yulong Li ◽  
Fenghua Zhou ◽  
Muhammad Aamir Raza ◽  
...  
Keyword(s):  
Energy Absorption ◽  
Tensile Loading ◽  
Aluminosilicate Glass ◽  
Damage Mechanisms

A multiscale approach for modelling impact on woven composites under consideration of the fabric topology

2018 ◽  
Vol 52 (21) ◽  
pp. 2859-2874 ◽  
Author(s):  
Martin Schwab ◽  
Melanie Todt ◽  
Heinz E Pettermann
Keyword(s):  
Total Energy ◽  
Energy Absorption ◽  
Temporal Distribution ◽  
Woven Composites ◽  
Multiscale Approach ◽  
Stress Concentrations ◽  
Damage Mechanisms ◽  
Explicit Finite Element ◽  
Impact Behaviour ◽  
The Impact

A computationally efficient multiscale modelling approach for predicting impact damage within fabric reinforced laminated composites is presented. In contrast to common ply-level approaches, the topology of a multi-layered fabric reinforced laminate is resolved at tow-level for a sub-domain embedded in a shell layer with homogenised representation of the laminate. The detailed sub-domain is entirely modelled using shell elements, where material nonlinearities such as damage and plasticity-like behaviour of the tows, inelastic behaviour of unreinforced resin zones up to failure and delamination between plies are accounted for. To exemplify the capabilities of the approach, an explicit finite element simulation of a laminated plate consisting of eight carbon fabric reinforced epoxy plies with eight harness satin weaving style in a drop weight impact test setup is conducted. The spatial and temporal distribution of intra- and inter-ply damage is predicted and the total energy absorption by the plate, as well as the contributions of individual damage mechanisms are evaluated. The predictions show very good agreement with corresponding experimental data from the literature and give insight into the impact behaviour of the laminate beyond the capability of usual experiments. The new approach allows to resolve the stress concentrations due to fabric topology in detail. Compared to common ply-level approaches this is reflected in different predicted energy absorptions per mechanism although, the total energy absorption hardly differs. This is especially important when the post impact behaviour of laminates is predicted as it is strongly influenced by the extent of the individual damage mechanisms.

Punch Shear Damage Behavior of Composite Laminates With and Without Pre-Defined Delaminations

Aerospace ◽  
2004 ◽  
Author(s):  
Bazle A. Gama ◽  
Mostafezur Rahman ◽  
John W. Gillespie
Keyword(s):  
Energy Absorption ◽  
Phenomenological Model ◽  
Composite Laminates ◽  
Displacement Curve ◽  
Thick Section ◽  
Shear Tests ◽  
Damage Mechanisms ◽  
Damage Behavior ◽  
Shear Damage ◽  
Significant Damage

Punch shear tests have been proven to simulate most of the damage mechanisms observed under ballistic impact. A phenomenological model has been developed to quantify the elastic and absorbed energies as a function of displacement during punch. This model is used to quantify the damage mechanisms of thick-section composites as a function of displacement, and number of pre-defined delamination planes. It has been identified that different damage mechanisms as a function of displacement can be correlated with the load-displacement curve of punch shear tests. Three significant damage mechanisms are identified. Energy absorbed by these damage mechanisms are partitioned and quantified for a thick-section composite made from plain-weave S-2 glass and toughened API epoxy SC15 resin. The effect of pre-defined delamination planes on energy absorption and damage mechanisms are also quantified.

A Numerical Study on Response of Foam Sandwich Beams with Corrugated Skins Subjected to Large Deflection

2013 ◽  
Vol 655-657 ◽  
pp. 1879-1883
Author(s):  
Zhong You Xie
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Energy Absorption ◽  
Large Deflection ◽  
Numerical Study ◽  
Face Sheet ◽  
Sandwich Beams ◽  
Element Analysis ◽  
Damage Mechanisms ◽  
Sine Curve

Foam sandwich beams with sine-curve skins subjected to large deflection were studied using finite element analysis, in which damage mechanisms of face sheet were introduced. Sandwich beams with various sinusoidal skins were simulated and results indicated that corrugation could make the deflection and energy absorption up to face fracture increase remarkably compared to the counterpart with planar skins.

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