Experimental and numerical lifetime assessment of Al 2024 sheet

Khan, S.; Kintzel, O.; Mosler, Jörn

doi:10.1016/j.ijfatigue.2011.09.010

Cited by 18 publications

(14 citation statements)

References 23 publications

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“…Therefore, damage initiation is assumed to be governed by the accumulated plastic strain (Khan et al, 2012). For a CFAMC, instead, mismatch in CTE between the constituents is the key parameter that influences in direct proportionality the thermal strains induced by thermo-mechanical fatigue loadings (Jansson and Leckie, 1992).…”

Section: Plastic Strain Range and Ratcheting Strainmentioning

confidence: 99%

Effect of fiber cross section geometry on cyclic plastic behavior of continuous fiber reinforced aluminum matrix composites

Giugliano

Barbera

Chen

2017

European Journal of Mechanics - A/Solids

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This paper investigates the cyclic plastic behavior of continuous fiber-reinforced aluminum matrix composites (CFAMCs) with different shape of fiber cross section arranged in a square packing geometry. The 2D micromechanical FEM models, composed of elastic undamaged reinforcement perfectly bonded to an elastic-perfectly plastic matrix with a volume fraction equal to 30%, are subjected to off-axis constant macro stress and a cyclic temperature history. Under such load conditions, the matrix undergoes large internal inelastic deformations potentially leading to internal crack initiation as well as macroscopic ratcheting. The computational method, the Linear Matching Method (LMM), is used throughout the analysis for the direct evaluation of shakedown, alternating plasticity and ratcheting behaviors. The effect of the matrix yield stress thermal degradation upon two common design limits, i.e., the reverse plasticity limit and the ratchet limit, is also investigated and discussed, including its influence on the off-axis low cycle fatigue crack initiation.

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Section: Plastic Strain Range and Ratcheting Strainmentioning

confidence: 99%

Effect of fiber cross section geometry on cyclic plastic behavior of continuous fiber reinforced aluminum matrix composites

Giugliano

Barbera

Chen

2017

European Journal of Mechanics - A/Solids

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“…18), i.e., an outer thin sheet (skin) with generally orthogonally arranged integral or fastened stiffeners (stringers and frames in the fuselage shell are sketched in the Fig. The fas tened stiffeners can be riveted, adhesive bonded, or welded to the skin [29], These aeronautical stiffened panels are prone to the in-service formation of damage. The fas tened stiffeners can be riveted, adhesive bonded, or welded to the skin [29], These aeronautical stiffened panels are prone to the in-service formation of damage.…”

Section: Application Of the Low Cycle Fatigue Damage Modelmentioning

confidence: 99%

“…The assumption of such a blunt notch reducing stress singularities is very practical from a modeling point of view [29], A mesh of C3D8R elements was generated with very fine ele ments around the elliptical notch. The material parameters used in the numerical analyses were extracted from Refs.…”

Section: Application Of the Low Cycle Fatigue Damage Modelmentioning

confidence: 99%

Identification and Validation of a Low Cycle Fatigue Damage Model for Al 7075-T6 Alloy

Masih

Mashayekhi

Torabian

2015

Journal of Engineering Materials and Technology

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Id e n tificatio n and V a lid a tio n of a Low Cycle Fatigue D am ag e M o d el for Al 7 0 7 5 -T 6 A lloyIn this paper, the behavior of 7075-T6 aluminum alloy under low cycle fatigue (LCF) loading is experimentally and numerically investigated using continuum damage mechan ics (CDM). An experimental procedure is established to identify the damage parameters for Al 7075-T6. A damage-coupled explicit finite element code is developed using the experimentally extracted damage parameters to study the material behavior under LCF loading. Moreover, fractographic examinations are conducted to identify the fatigue crack initiation locations and propagation mechanisms. The model is employed for life time assessment of stringer-skin connection of a fuselage and the results are compared with the data available in the literature.

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“…For example, Kahn et al report a study assessing the durability of Al 2024 sheet components for a particular aircraft fuselage stringer assembly. 23 The desired output from this study is specific to an alloy, application, and loading condition, and therefore, significant experimental data were collected and used to determine the model type (ductile-brittle damage model in this case), provide model parameters, and validate model results.…”

Section: Integrated Computational Materials Engineering For Vehicle Wmentioning

confidence: 99%

Reducing Vehicle Weight and Improving U.S. Energy Efficiency Using Integrated Computational Materials Engineering

Joost

2012

JOM

355

127

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Transportation accounts for approximately 28% of U.S. energy consumption with the majority of transportation energy derived from petroleum sources. Many technologies such as vehicle electrification, advanced combustion, and advanced fuels can reduce transportation energy consumption by improving the efficiency of cars and trucks. Lightweight materials are another important technology that can improve passenger vehicle fuel efficiency by 6-8% for each 10% reduction in weight while also making electric and alternative vehicles more competitive. Despite the opportunities for improved efficiency, widespread deployment of lightweight materials for automotive structures is hampered by technology gaps most often associated with performance, manufacturability, and cost. In this report, the impact of reduced vehicle weight on energy efficiency is discussed with a particular emphasis on quantitative relationships determined by several researchers. The most promising lightweight materials systems are described along with a brief review of the most significant technical barriers to their implementation. For each material system, the development of accurate material models is critical to support simulation-intensive processing and structural design for vehicles; improved models also contribute to an integrated computational materials engineering (ICME) approach for addressing technical barriers and accelerating deployment. The value of computational techniques is described by considering recent ICME and computational materials science success stories with an emphasis on applying problem-specific methods.

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Experimental and numerical lifetime assessment of Al 2024 sheet

Cited by 18 publications

References 23 publications

Effect of fiber cross section geometry on cyclic plastic behavior of continuous fiber reinforced aluminum matrix composites

Effect of fiber cross section geometry on cyclic plastic behavior of continuous fiber reinforced aluminum matrix composites

Identification and Validation of a Low Cycle Fatigue Damage Model for Al 7075-T6 Alloy

Reducing Vehicle Weight and Improving U.S. Energy Efficiency Using Integrated Computational Materials Engineering

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