A portable device for single point strain analysis in sheet metal forming processes

Wankhede, Pankaj; Narayanaswamy, Nara Guru; Suresh, Kurra; Priyadarshini, Amrita

doi:10.1016/j.ohx.2022.e00371

Cited by 4 publications

(5 citation statements)

References 31 publications

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“…Both techniques require less time and have better resolution, hence contributing to more reliable results. The main components in the automatic strain measurement system are the image acquisition hardware and image processing software [73]. ASTM E2218-02 standard [74] provides guidelines for strain measurement.…”

Section: Grid Marking and Deformation Determination Methodsmentioning

confidence: 99%

“…As previously mentioned, the DIC system must be used in association with image processing software. The commonly used are namely: German Argus or ARAMIS system of GOM company, the American Grid Analyser Model 100U of the FMTI system Inc. (Hamilton, ON, Canada), the VIC-2D(3D) from the Correlated Solutions Inc. (Irmo, SC, USA), the Dante Dynamics as well as the ICASOF [69,73]. In spite of the high measurement accuracy provided by these systems, they are characterized by an expensive cost [76].…”

Section: Grid Marking and Deformation Determination Methodsmentioning

confidence: 99%

“…Inc. (Hamilton, ON, Canada), the VIC-2D(3D) from the Correlated Solutions Inc. (Irmo, SC, USA), the Dante Dynamics as well as the ICASOF [69,73]. In spite of the high measurement accuracy provided by these systems, they are characterized by an expensive cost [76].…”

Section: Limitations Of Fldmentioning

confidence: 99%

See 2 more Smart Citations

A Review of Sheet Metal Forming Evaluation of Advanced High-Strength Steels (AHSS)

Pereira,

Peixinho,

Costa

2024

Metals

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This paper presents a review on the formability evaluation of AHSS, enhancing necking-based failure criteria limitations. Complementary fracture/damage constitutive modeling approaches specifically tailored to formability evaluation, validated through numerical and experimental methods, are also subjects of research. AHSS are widely processed through sheet metal forming processes. Although an excellent choice when lightweight, high-strength, and ductility are critical factors, their multi-phase microstructure accentuates forming challenges. To accurately model forming behavior, necking-based failure criteria as well as direct fracture models require improvements. As a necking-based failure model, the conventional forming limit diagram/curve (FLD/FLC) presents limitations in estimating direct fracture (surface cracks, edge cracks, shear cracks), as well as deformation histories under non-linear strain paths. Thus, significant research efforts are being made towards the development of advanced fracture constitutive models capable of predicting fracture scenarios without necking, which are more frequently observed in the realm of AHSS. Scientific community research is divided into several directions aiming at improving the forming and fracture behavior accuracy of parts subjected to sheet metal forming operations. In this review paper, a comprehensive overview of ductile fracture modeling is presented. Firstly, the limitations of FLD/FLC in modeling fracture behavior in sheet metal forming operations are studied, followed by recent trends in constitutive material modeling. Afterwards, advancements in material characterization methods to cover a broad range of stress states are discussed. Finally, damage and fracture models predicting failure in AHSS are investigated. This review paper supplies relevant information on the current issues the sheet metal forming community is challenged with due to the trend towards AHSS employment in the automotive industry.

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Section: Grid Marking and Deformation Determination Methodsmentioning

confidence: 99%

Section: Grid Marking and Deformation Determination Methodsmentioning

confidence: 99%

See 1 more Smart Citation

A Review of Sheet Metal Forming Evaluation of Advanced High-Strength Steels (AHSS)

Pereira,

Peixinho,

Costa

2024

Metals

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“…Направленное изменение толщины заготовки к заданной толщине детали возможно путем варьирования постоянных в процессе технологических параметров [12] (размеров заготовки, геометрии инструмента, коэффициента трения, граничных условий, показателей механических свойств и т.д.) и требует аналитически [13][14][15] представленного и решенного выражения минимальной разнотолщинности [16][17][18]:…”

Section: теоретические исследования процесса отбортовки для получения...unclassified

“…Запишем условие минимизации (2) с учетом ( 12): ( 13) Выражение ( 14) с учетом (11) примет вид (14) Варьируя по a и взяв производную, получим следующее выражение: (15) После интегрирования оно примет вид (16) Определим относительную технологически возможную толщину детали по формуле (17) С использованием формул (3), ( 9), ( 12) и ( 16) получены значения m = 0,1, σ ρk = 0,3311, Q = -0,7976, a = -0,1497 и построено распределение технологически возможной и заданной толщин выпуклой детали cо следующими параметрами: больший радиус R дет = 22,35 мм; меньший -r дет = 11,05 мм; радиус кривизны детали в меридиональном направлении R ρ = 1000 мм. Деталь получена из заготовки с углом конусности α заг = 16,4° при формообразовании с коэффициентом трения на внутренней поверхности заготовки f = 0,05 и с учетом коэффициента анизотропии трансверсально-изотропного тела μ = 0,5.…”

Section: теоретические исследования процесса отбортовки для получения...unclassified

Improving shape formation under conditions of plane tensile stress

Demyanenko,

Popov,

Levagina

2023

Izv.VUZ. Tsvet. Met.

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Thin-walled axisymmetric truncated parts made of sheet billets are actively used in rocket and aerospace engineering. Improvement to their shape formation, based on directed material thickness change will ensure the production of parts with minimum thickness variation. This will also enable aviation and space industry enterprises to attain leading positions, as well as reduce labor costs. This work studies the possibility of obtaining thin-walled axisymmetric parts of truncated tapered shape using one of the methods of sheet metal stamping under flat tensile stress conditions (flanging). The mechanism was identified and the analysis of the stress-strain state of the billet during deformation was carried out. This takes into account the minimizing of the difference between the specified and technologically possible thicknesses. A mathematical model was developed to consider the shaping method based on the process of flanging. Theoretical studies were based on the principles of the plastic deformation theory of sheet materials. This was achieved by the following factors: approximate differential equations of force equilibrium; equations of constraint; plasticity conditions; and fundamental constitutive relations under given initial and boundary conditions. The process of flanging was simulated using the LS-DYNA software package with the following initial data of a conical billet made of 12Kh18N10T steel: cone angle 16.4°, thickness Sbillet = 0.3 mm. The aim was to eliminate errors in designing a tool for future implementation of the method on a manufactured die tooling, as well as to confirm the theoretical conclusions on the selection of technological parameters and achieve minimal thickness variation. The steps of computer modeling are presented, indicating the main process parameters such as material model, mechanical characteristics of the workpiece material, type of elements, kinematic loads, conditions of contact interaction of elements with each other, etc.

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A Review on Sheet Metal Forming Evaluation of Advanced High Strength Steels (AHSS)

Pereira,

Peixinho,

Costa

2024

Preprint

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This paper presents a review on numerical and experimental methods to predict fracture of ad-vanced high strength steels (AHSS). AHSS are widely processed through sheet metal forming processes. Although being an excellent choice when lightweight, high strength and ductility are critical factors, their multi-phase microstructure accentuates forming challenges. To accurately model forming behavior, necking based failure criteria as well as direct fracture models require improvements. As a necking based failure model, the conventional forming limit diagram/curve (FLD/FLC) presents limitations such as in estimating direct fracture (surface cracks, edge cracks, shear cracks), as well as deformation histories under nonlinear strain paths. Thus, significant re-search efforts are being made towards the needs of advanced fracture constitutive models capa-ble of predicting fracture scenarios without necking, more frequently observed in the realm of AHSS. Scientific community research is divided into several directions aiming at improving the forming and fracture behavior accuracy of parts subjected to sheet metal forming operations. In this review paper, a comprehensive overview on ductile fracture modeling is presented. Firstly, the FLD/FLC limitations modeling fracture behavior in sheet metal forming operations are stud-ied. Followed by the recent trends in constitutive material modeling. Afterwards, material char-acterization methods advancements to cover a broad range of stress states are comprised. Final-ly, damage and fracture models predicting failure in AHSS are investigated. This review paper supplies relevant information on the current issues the sheet metal forming community is chal-lenged with due to the trend towards AHSS employment in the automotive industry.

show abstract

A portable device for single point strain analysis in sheet metal forming processes

Cited by 4 publications

References 31 publications

A Review of Sheet Metal Forming Evaluation of Advanced High-Strength Steels (AHSS)

A Review of Sheet Metal Forming Evaluation of Advanced High-Strength Steels (AHSS)

Improving shape formation under conditions of plane tensile stress

A Review on Sheet Metal Forming Evaluation of Advanced High Strength Steels (AHSS)

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