A Benchmark Example for Delamination Propagation Predictions Based on the Single Leg Bending Specimen Under Quasi-static and Fatigue Loading

Krueger, Ronald; Deobald, Lyle; Gu, Haiwei

doi:10.12783/asc33/26004

Cited by 7 publications

(22 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…All benchmark examples were designed to be independent of the analysis software used and allow for the assessment of the delamination growth prediction capabilities in commercial finite element codes. To allow further assessment, new SLB-based benchmark examples, were recently created, since they allow variation of the mode ratio G II /G T by altering the thicknesses, t 1 and t 2 , of the arms [9]. In previously published benchmark cases [5], the mixed mode ratio was fixed and almost independent on the delamination length a [10].…”

Section: Analysis Benchmarkingmentioning

confidence: 99%

“…Simply implementing a criterion in which propagation depends on a fixed critical energy release rate, G c , is not sufficient in this case. Benchmarking therefore must be used to assess the appropriate implementation of mixed-mode failure criteria in finite element codes intended to be used for automated crack propagation analyses under quasi-static [9] and fatigue loading.…”

Section: Analysis Benchmarkingmentioning

confidence: 99%

“…When obtaining the benchmark, G c should be determined using the same expression for G c used later in the automated analysis. In the present study, the B-K criterion, suggested by Benzeggah and Kenane [9], was used. It is assumed that the delamination propagates when the failure index reaches unity.…”

Section: Development Of Benchmark Cases For Delamination Growth Predimentioning

confidence: 99%

“…Considering the various forms in which crack growth rate data may be published for various materials [12], a convenient interpolation scheme is necessary to calculate crack growth rates for a crack tip under arbitrary loading. The scheme that was used in a previous publication [9] was also used here for its simplicity and is demonstrated for the case where the unknown Paris Law for the symmetric SLB specimen (fixed…”

Section: Interpolation Of Mixed-mode Delamination Growth Ratesmentioning

confidence: 99%

“…In this paper, the development of fatigue benchmark cases based on the SLB specimen with identical and different arm thicknesses, t 1 and t 2 , is presented. First, benchmark cases based on Linear Elastic Fracture Mechanics (LEFM) and VCCT, which have recently been developed for crack propagation prediction under quasi-static loading, are briefly discussed [9]. Second, based on these quasi-static benchmark results, additional benchmark cases to assess delamination propagation under fatigue loading are created.…”

mentioning

confidence: 99%

See 4 more Smart Citations

A benchmark example for delamination growth predictions based on the Single Leg Bending specimen under fatigue loading

Krueger

Deobald

2020

Adv. Model. and Simul. in Eng. Sci.

Self Cite

View full text Add to dashboard Cite

Over the past two decades, the use of fracture mechanics has become common practice to characterize the onset and growth of delaminations [1, 2]. In order to predict delamination onset or growth, the calculated strain energy release rate components are compared to interlaminar fracture toughness properties measured over a range from pure mode I loading to pure mode II loading [2]. The virtual crack closure technique (VCCT) is widely used for computing energy release rates based on results from continuum (2D) and solid (3D) finite element (FE) analyses, and to supply the mode separation required when using the mixed-mode fracture criterion [3, 4]. Recently, VCCT was implemented into several commercial finite element codes such as ABAQUS/Standard ® , Nastran ™ , Marc ™ , and Ansys ®. As new methods for analyzing composite delamination are incorporated into finite element codes, the need for comparison and benchmarking becomes important, since each code requires specific input parameters unique to its implementation. A software independent approach based on Linear Elastic Fracture Mechanics (LEFM) was

show abstract

Section: Analysis Benchmarkingmentioning

confidence: 99%

Section: Analysis Benchmarkingmentioning

confidence: 99%

Section: Development Of Benchmark Cases For Delamination Growth Predimentioning

confidence: 99%

Section: Interpolation Of Mixed-mode Delamination Growth Ratesmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

A benchmark example for delamination growth predictions based on the Single Leg Bending specimen under fatigue loading

Krueger

Deobald

2020

Adv. Model. and Simul. in Eng. Sci.

Self Cite

View full text Add to dashboard Cite

show abstract

An explicit delamination propagation algorithm to simulate delamination growth under quasi-static and fatigue loading without re-meshing using virtual crack closure technique and progressive nodal release

Carvalho

Ramnath

Mabson

et al. 2022

Journal of Composite Materials

Self Cite

View full text Add to dashboard Cite

A modeling approach is proposed to simulate delamination propagation in composite laminates under both quasi-static and fatigue loading regimes. Delamination growth is simulated using the Virtual Crack Closure Technique combined with a progressive nodal release strategy. In the proposed approach, the delamination propagation increment is determined explicitly, based on the energy release rate calculated in the previous time increment. Explicitly determining the delamination propagation increment linearizes the system of equations that results from the progressive nodal release strategy and eliminates convergence issues associated with delamination growth. In fatigue, the delamination growth increment is calculated using as input growth rates characterized experimentally via fitting of a suitable form of the Paris law to the experimental data. Under quasi-static loading conditions, a sufficiently large pseudo-growth rate is assumed, such that the simulation results converge to the results obtained with the chosen binary (growth/no growth) fracture criterion. Since both fatigue and quasi-static loading regimes share the same underlying algorithm, simulating the transition between fatigue and quasi-static delamination growth is trivial. The approach is demonstrated to accurately simulate delamination growth for all cases assessed, including quasi-static mixed-mode loading and the transition between fatigue and quasi-static delamination growth regimes. Finally, it is also shown that the approach can simulate both self-similar and non-self-similar delamination growth.

show abstract

A cohesive zone model for predicting the initiation of Mode II delamination in composites under cyclic loading

Rafiee

Sotoudeh

2020

Journal of Reinforced Plastics and Composites

View full text Add to dashboard Cite

A new approach for simulating delamination initiation under cyclic loading is proposed. This approach is based on the hysteresis cohesive zone modeling and the gradual degradation of interface properties. The initiation of delamination is predicted based on the monotonic traction–separation law of the interface. A damage criterion is proposed that depends on the bilinear traction–separation law and interlaminar stiffness is degraded by defining a damage parameter as a function of number of cycles and bilinear traction–separation law parameters. Numerical simulation is accomplished by implementing 2D finite element modeling for the case of double-notched specimen. Four-node zero-thickness interfacial cohesive elements are defined to capture the delamination behavior of midplane in the specimen. The results of numerical simulation are compared with available experimental data and a good agreement is observed. The main novelty of this research lies on assuming a cycle-by-cycle irreversible decrease in interlaminar stiffness prior to damage initiation and applying a damage criterion based on the bilinear traction–separation law in order to predict the number of cycles for initiation of delamination.

show abstract

A Benchmark Example for Delamination Propagation Predictions Based on the Single Leg Bending Specimen Under Quasi-static and Fatigue Loading

Cited by 7 publications

References 4 publications

A benchmark example for delamination growth predictions based on the Single Leg Bending specimen under fatigue loading

A benchmark example for delamination growth predictions based on the Single Leg Bending specimen under fatigue loading

An explicit delamination propagation algorithm to simulate delamination growth under quasi-static and fatigue loading without re-meshing using virtual crack closure technique and progressive nodal release

A cohesive zone model for predicting the initiation of Mode II delamination in composites under cyclic loading

Contact Info

Product

Resources

About