Progressive Transverse Cracking In Composite Laminates

Laws, Norman; Dvorak, George J.

doi:10.1177/002199838802201001

Cited by 303 publications

(111 citation statements)

References 18 publications

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“…Micro-cracking is a complex phenomenon that has been more often studied in thin films bonded to a substrate (Laws and Dvorak, 1988;Nairn, 1989;Xia andHutchinson, 2000, Kim andNairn, 2000;Fu et al, 2013). Unlike the present case, the crack length is known (the thickness of the thin layer) and the problem is much easier to address.…”

Section: Accepted M Manuscriptmentioning

confidence: 96%

Prediction of the surface cracking pattern of an oxidized polymer induced by residual and bending stresses

Leguillon

Lafarie-Frenot

Pannier

et al. 2016

International Journal of Solids and Structures

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To cite this version:Dominiquesmall durations there is a linear elastic phase followed by an abrupt failure of the specimen whereas for higher oxidation times, the elastic phase is followed by a nonlinear one corresponding to the development of numerous superficial micro-cracks prior to failure. In order to predict this behavior, a finite fracture mechanics approach based on the coupled criterion is used. This criterion requires an energy and a stress condition to be fulfilled. This approach is here extended to take into account the gradient of properties of the oxidized layer:Young"s modulus, tensile strength, toughness. One novelty of the approach is to implement the model in a periodic representative cell in order to process an increasing number of cracks.Despite the large scattering in the experimental detection of the initiation of the micro-cracks and their counting, the predictions agree rather well with the observations: the oxidation times leading either to a sudden failure of the sample or to micro-cracking are well reproduced, and ACCEPTED MANUSCRIPT A C C E P T E D M A N U S C R I P T the loads triggering the crack onset as well as the increase in number of cracks are somewhat well predicted.

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Section: Accepted M Manuscriptmentioning

confidence: 96%

Prediction of the surface cracking pattern of an oxidized polymer induced by residual and bending stresses

Leguillon

Lafarie-Frenot

Pannier

et al. 2016

International Journal of Solids and Structures

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show abstract

“…Transverse cracks nucleate from pre-existing flaws within the matrix but grow parallel to the fibers and span the thickness of the lamina. 9,10,14,17,[47][48][49] Often, the growth of individual transverse cracks is extremely rapid; however, the effects of transverse cracking on the stiffness of a composite laminate can be progressive if multiple cracks form over an extended period of time and throughout an expansive volume. Eventually, transverse cracking is succeeded by more catastrophic damage mechanisms including interlaminar delamination, fiber breakage, pullout and bridging associated with macroscopic laminate fracture.…”

Section: Iib Multiple Isv Formulation Of St To Account For Multiplementioning

confidence: 99%

“…Various authors have used crack density, geometry, strain energy release rate, and other crack features to characterize the damage evolution. [8][9][10][11][12][13][14][15][16] Others postulate damage evolution laws and characterize those laws using experiments. [17][18][19][20][21][22] CDM models must also employ failure criteria to indicate damage initiation.…”

Section: Introductionmentioning

confidence: 99%

A Thermodynamically-Based Mesh Objective Work Potential Theory for Predicting Intralaminar Progressive Damage and Failure in Fiber-Reinforced Laminates

Pineda¹,

Waas²

2012

53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference

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A thermodynamically-based work potential theory for modeling progressive damage and failure in fiber-reinforced laminates is presented. The current, multiple-internal state variable (ISV) formulation, enhanced Schapery theory (EST), utilizes separate ISVs for modeling the effects of damage and failure. Damage is considered to be the effect of any structural changes in a material that manifest as pre-peak non-linearity in the stress versus strain response. Conversely, failure is taken to be the effect of the evolution of any mechanisms that results in post-peak strain softening. It is assumed that matrix microdamage is the dominant damage mechanism in continuous fiber-reinforced polymer matrix laminates, and its evolution is controlled with a single ISV. Three additional ISVs are introduced to account for failure due to mode I transverse cracking, mode II transverse cracking, and mode I axial failure. Typically, failure evolution (i.e., post-peak strain softening) results in pathologically mesh dependent solutions within a finite element method (FEM) setting. Therefore, consistent character element lengths are introduced into the formulation of the evolution of the three failure ISVs. Using the stationarity of the total work potential with respect to each ISV, a set of thermodynamically consistent evolution equations for the ISVs is derived. The theory is implemented into commercial FEM software. Objectivity of total energy dissipated during the failure process, with regards to refinements in the FEM mesh, is demonstrated. The model is also verified against experimental results from two laminated, T800/3900-2 panels containing a central notch and different fiber-orientation stacking sequences. Global load versus displacement, global load versus local strain gage data, and macroscopic failure paths obtained from the models are compared to the experiments.

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“…Transverse cracks nucleate from preexisting flaws within the matrix but grow parallel to the fibers and span the thickness of the lamina. 5,6,8,10,18,59,60 Often, the growth of individual transverse cracks is extremely rapid; however, the effects of transverse cracking on the stiffness of a composite laminate can be progressive if multiple cracks form over an extended period of time. Eventually, transverse cracking is succeeded by more catastrophic damage mechanisms like interlamina delamination, fiber breakage, pull-out and bridging associated with macroscopic laminate fracture.…”

Section: Iia Dual-isv Formulation Of St To Model Progressive Microdmentioning
confidence: 99%

Computational Implementation of a Thermodynamically Based Work Potential Model for Progressive Microdamage and Transverse Cracking in Fiber-reinforced Laminates
Pineda
¹
,
Waas²,
Bednarcyk
³

et al. 2010
51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference
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Progressive Transverse Cracking In Composite Laminates

Cited by 303 publications

References 18 publications

Prediction of the surface cracking pattern of an oxidized polymer induced by residual and bending stresses

Prediction of the surface cracking pattern of an oxidized polymer induced by residual and bending stresses

A Thermodynamically-Based Mesh Objective Work Potential Theory for Predicting Intralaminar Progressive Damage and Failure in Fiber-Reinforced Laminates

Computational Implementation of a Thermodynamically Based Work Potential Model for Progressive Microdamage and Transverse Cracking in Fiber-reinforced Laminates

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