Stochastic analysis of inter- and intra-laminar damage in notched PEEK laminates

Abstract

Abstract. This paper presents a finite element model to predict the progressive damage mechanisms in open-hole PEEK (Poly-Ether-Ether-Ketone) laminates. The stochastic laminate's properties with non-uniform stress distribution are considered from element to element using the Gaussian distribution function. The failure modes considered are: fiber tension/ compression, matrix tension/compression, fiber/matrix shear, and delamination damage. The onset of damage initiation and propagation are predicted and compared with three different failure criteria: strain-based damage criterion, Hashin-based degradation approach and stress-based damage criterion which is proposed by the authors of the present work. The interlaminar damage modes associated with fiber/matrix shearing and delamination are modeled using the cohesive elements technique in ABAQUS™ with fracture energy evolution law. Mesh sensitivity and the effect of various viscous regularization factors are investigated. Damage propagation and failure path are examined by re-running the program for several times.

The Impact Performance of Woven-Fabric Thermoplastic and Thermoset Composites Subjected to High-Velocity Soft- and Hard-Impact Loading

“…To calculate and compare the values of the contact pressures caused by the soft-gelatine projectiles and hard aluminium-alloy projectiles, the impact behaviour of the CF/PEEK composite target was modelled. The relevant material properties of the CF/PEEK composites required for the modelling studies may be found from the literature [11,12,15,[48][49][50][51][52][53][54] and are given in Table 4.…”

Modelling of mechanical properties of randomly oriented strand thermoplastic composites

“…Failure initiation and propagation were modelled with Hashin's failure criteria and fracture energy evolution law. In this work, the strength modelling of ROS is developed using failure initiation and propagation methods 20 coupling with the Hashin's failure criteria.…”

“…In this article, fracture energies were chosen so that stressstrain curves of [0/AE60] 3S and [90/AE30] 3S laminates obtained from FE analysis would match the experimental results, as shown in Figure 12. Baseline energy values were taken from the modelling papers, 20,23 which relied on approximate values to model progressive crack growth in open-hole GLARE 23 and CF…”

Cohesive zone models and impact damage predictions for composite structures

“…Table 1 lists 45 references published between 2008 and 2015 in which this element is used. ABAQUS also offers the 6 node, three dimensional cohesive element COH3D6 to be used with tetrahedral solid elements [204][205][206][207][208] and the 4 node, two-dimensional cohesive element COH2D4 [209][210][211]. Cohesive elements are also available in many commercial finite element programs including LS-DYNA, MSC.Marc and ANSYS [212].…”