Incremental Hole Drilling for Residual Stress Analysis of Strongly Textured Material States – A New Calibration Approach

Schuster, Simone; Gibmeier, Jens

doi:10.1007/s11340-015-0104-3

Cited by 12 publications

(14 citation statements)

References 24 publications

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“…We demonstrated a reliable residual stress analysis by means of the incremental hole-drilling method on a deep drawn cup with a strong local anisotropy using an evaluation approach based on multiple case-specific calibration functions, which we proposed in [7]. The knowledge of the effective elasticity tensor C ijkl is required.…”

Section: Resultsmentioning

confidence: 99%

“…Accordingly, strain gage rosettes of type EA-11-031RE-120 from Vishay Measurement Group were applied on the sample. The residual stress depth profiles were calculated using the new calibration approach based on the differential method and multiple case-specific calibration functions considering the elastic anisotropy, which we recently proposed in [7]. The following steps have to be conducted: (i) Texture measurement and determination of the ODF (ii) Calculation of the elasticity tensor C ijkl (iii) Determination of four case-specific calibration functions (two FE simulations required) (iv) Residual stress calculation Basically, the residual stress components in the two perpendicular directions of the rosette can be determined with this approach.…”

Section: Fig 2: Pole Figures Of Type {100} {110} and {111} For The mentioning

confidence: 99%

“…The following steps have to be conducted: (i) Texture measurement and determination of the ODF (ii) Calculation of the elasticity tensor C ijkl (iii) Determination of four case-specific calibration functions (two FE simulations required) (iv) Residual stress calculation Basically, the residual stress components in the two perpendicular directions of the rosette can be determined with this approach. The FE model shown in [7] was used for the determination of the case-specific calibration functions. The elastic anisotropy was considered by means of the elasticity tensor.…”

Section: Fig 2: Pole Figures Of Type {100} {110} and {111} For The mentioning

confidence: 99%

“…3) a good agreement between experiment and FE model could be achieved. Hence, with recourse to the preliminary studies in [6,7] we can conclude that the new calibration approach should always be applied in case of textured material states regardless of the additional effort. Deviations between experiment and FE model can be explained by (i) the simplifying assumptions in the FE model (no kinematic hardening, lack of data of the flow curve for high strains), (ii) large residual stress gradients near the measuring locations and (iii) high residual stresses with respect to the materials yield strength (i.e.…”

Section: Finite Element Simulation Of the Deep Drawing Processmentioning

confidence: 99%

“…Significant errors in stress calculation can occur, if conventional calibration data is applied to residual stress analysis on strongly textured materials [6]. Thus, we proposed a new calibration approach based on the differential method [7]. Four case-specific calibration functions must be determined numerically to account for the anisotropic elastic material properties.…”

Section: Introductionmentioning

confidence: 99%

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Local Residual Stress Analysis on Deep Drawn Cups by Means of the Incremental Hole-Drilling Method

Pagenkopf

Gibmeier

Schuster

2016

Residual Stresses 2016

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Abstract. In addition to residual stresses sheet metal forming induces characteristic crystallographic texture, hence, the material behavior is anisotropic. In general, the standard evaluation procedures of residual stress analysis techniques are limited to isotropic material states. In the present paper deep drawn steel cups of dual phase steel DP600 are analyzed by using a recently proposed calibration approach for residual stress analysis by means of the incremental hole-drilling method for highly textured material states. It is based on the differential method, which is enhanced with four case specific calibration functions. The multiple case specific calibration functions are determined by means of finite element simulations using the orientation distribution function (ODF) in combination with Hill's assumption and single crystal elastic constants of iron to calculate the effective elasticity tensor to account for elastic anisotropy. Supplementary, the deep drawing process is simulated using a finite element model based on the Hill48 yield criterion. Finally, the comparison shows that the numerical results are in satisfactory agreement to the experimental data.

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Section: Resultsmentioning

confidence: 99%

Section: Fig 2: Pole Figures Of Type {100} {110} and {111} For The mentioning

confidence: 99%

Section: Fig 2: Pole Figures Of Type {100} {110} and {111} For The mentioning

confidence: 99%

Section: Finite Element Simulation Of the Deep Drawing Processmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Local Residual Stress Analysis on Deep Drawn Cups by Means of the Incremental Hole-Drilling Method

Pagenkopf

Gibmeier

Schuster

2016

Residual Stresses 2016

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A Novel Approach to Robustly Determine Residual Stress in Additively Manufactured Microstructures Using Synchrotron Radiation

et al. 2021

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Introduction 1.1. Microstructure of Additively Manufactured MaterialsAdditive manufacturing (AM) is the subject of many recent publications. [1][2][3] Typical representatives of AM methods for the processing of metallic metals are mainly divided into three categories: wire feeding, powder feeding, and powder bed fusion systems. [3] The latter technique enables the production of metallic structures by layer-wise melting of a thin metal powder bed only using AM equipment and a sliced model generated by a computeraided design (CAD) program. The application of a powder bed in powder-based AM technology facilitates the selective processing of individual layers in complex geometry. The most commonly used powder bed fusion techniques are selective electron beam powder bed fusion (EPBF) and laser powder bed fusion (LPBF). [3,4] EPBF structures are produced in a vacuum atmosphere and at a high temperature, eventually leading to a relatively low residual stress level. In contrast, LPBF processes usually take place at temperatures up to 200 C. The localized energy input and the small melt pool sizes, respectively, in combination with low build chamber temperatures result in high temperature gradients, whereby residual stresses are favored. [5] Generally, the influence of scan vectors and related strategies is a complex topic, which crucially has to be dealt with. Scan vector lengths, orientations, the order of rotation within a specific layer, and its subsequent layers are variables in every building process. Only a very limited number of comprehensive studies have reported on the effect of the scan strategy on the density, microstructure, mechanical properties, and residual stresses of LPBF parts, as clearly stated in previous studies. [5][6][7][8] Already an increased scan path length, e.g., due to a change of cross-section of a part, can result in a severely decreased relative density as well as fundamentally changed microstructure. [9,10] The influence of parameters on the evolution of residual stresses was already numerously studied. [11,12] The authors showed that the residual stresses are mainly influenced by cooling rates, temperature gradients, and melt pool sizes. Also, a minimization of the temperature gradient by powder bed preheating is an option to reduce process-induced stresses. [1,13] The high influence of the laser power and the effect of scan strategies have been characterized.

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Residual Stress in Engineering Materials: A Review

et al. 2021

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The accurate determination of residual stresses has a crucial role in understanding the complex interactions between microstructure, mechanical state, mode(s) of failure, and structural integrity. Moreover, the residual stress management concept contributes to industrial applications, aiming to improve the product's service performance and life cycle. In this regard, the industry requests rapid, efficient, and modern methods to identify and control the residual stress state. This review article contains three main sections. The first section covers different residual stress determination methods and reports the advancements over the recent decade. The second section includes the role of residual stresses in the performance of a broad range of materials including metallic alloys, polymers, ceramics, composites, and biomaterials. This is presented by classifying different science areas dealing with residual stresses into two main groups, including “origins” and “effects” of residual stresses. The range of topics covered are “welding, machining, curing/cooling, and spray coating processes,” “medical and dental sciences,” and “fatigue and fracture mechanisms.” The third section summarizes various strategies to effectively control residual stresses through different manufacturing procedures. It is hoped that the data provided herein serves as a valuable up‐to‐date reference for engineers and scientists in the field of residual stress.

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Incremental Hole Drilling for Residual Stress Analysis of Strongly Textured Material States – A New Calibration Approach

Cited by 12 publications

References 24 publications

Local Residual Stress Analysis on Deep Drawn Cups by Means of the Incremental Hole-Drilling Method

Local Residual Stress Analysis on Deep Drawn Cups by Means of the Incremental Hole-Drilling Method

A Novel Approach to Robustly Determine Residual Stress in Additively Manufactured Microstructures Using Synchrotron Radiation

Residual Stress in Engineering Materials: A Review

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