Predicting plastic deformation and work hardening during V-band formation

Müller, Matthias A.; Barrans, Simon; Blunt, Liam

doi:10.1016/j.jmatprotec.2010.11.020

Cited by 23 publications

(15 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Other past numerical research has focused on predicting the residual stresses during the cold bending process, including FE based methods for predicting residual stresses in pressbraked thin-walled sections [67,68] as well as curved structural wide flange steel sections [69]. Other studies have explored the relationship between hardness and residual strain [70], including an FE approach used to relate measured hardness and predicted equivalent plastic strains in cold-formed V-band clamps manufactured from initially flat strips [71].…”

Section: Numerical Modelingmentioning

confidence: 99%

Full-field measurement of residual strains in cold bent steel plates

Gerbo

Thrall

Smith

et al. 2016

Journal of Constructional Steel Research

View full text Add to dashboard Cite

With the recent American Association of State Highway and Transportation Officials bridge design code acceptance of cold bent fracture-critical and nonfracture-critical plates and the increasing use of cold bending by the bridge industry, there is a need to better understand and predict residual strains in cold bent steel. However, measuring residual strains is a challenging task since the bending process typically interferes with conventional instrumentation. This paper introduces three-dimensional Digital Image Correlation (DIC) as a new, non-destructive approach to measuring residual strains in cold bent steel that captures fullfield strain data with high accuracy. DIC was used to measure residual strains in 18 cold bent 12.7 mm thick ASTM A36 steel plates, bent using a press-brake to a constant radius of 102 mm with varying angles (10, 20, and 30 degrees) and plate widths (76.2 mm and 203 mm). The measured residual strains are compared to analytical predictions and both twoand three-dimensional finite element models. A parametric study, using the validated finite element models, is completed for additional widths (12.7 mm and 140 mm) and thicknesses (6.35 mm and 19.1 mm) to investigate the effect of these parameters on circumferential strains, contact pressure, strain state, and to make modeling recommendations. Results are used to develop a means of predicting peak residual strains based on the final plate dimensions-a useful quality control measure.

show abstract

Section: Numerical Modelingmentioning

confidence: 99%

Full-field measurement of residual strains in cold bent steel plates

Gerbo

Thrall

Smith

et al. 2016

Journal of Constructional Steel Research

View full text Add to dashboard Cite

show abstract

“…Paralikas et al 14,15 reduced the shear strains to 35% and longitudinal strains to 25% to improve the quality of the V-section process by roll forming. Muller et al 16 simulated the roll forming process and evaluated equivalent strain distribution from the finite element simulation studies. The authors predicted the hardness near the bend portion of V-clamps by developing an expression between the micro hardness and equivalent strain distribution.…”

Section: Introductionmentioning

confidence: 99%

“…Five different materials were considered for the investigation by Tekkaya and materials were subjected to strain hardening. The modified equation(16) can be written as follows HV ¼ 2:475Y at equivalent plastic strain of 0:112 ð Þ…”

mentioning

confidence: 99%

Modeling of anisotropic behavior to investigate the effect of hardness on AA2014 aluminum alloys under upsetting

Harikrishna¹,

Davidson

Nagaraju

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

The hardness of the metals in the bulk forming operations, such as upsetting increases, when the material is compressed. The increase in the level of strain improves the hardness of the billets in the upsetting tests. Issues like anisotropy may arise depending on the class of material and effect of the anisotropy on the metallic hardness is an interesting study for the effective utilization of material. Three sets of AA2014 billets solutionized at 502 ℃ and aged for 9 h, 13 h, and 18 h at a temperature of 150 ℃ were considered for the investigation. The effect of the material constant ( C1) on the variations in hardness was studied. Billets aged for 18 h were upset by employing three different lubricants namely grease, molybdenum disulphide, and white grease to study the effect of lubrication on anisotropy. The effect of anisotropy on hardness was studied by modeling Hill’s criteria for anisotropy with the hardness. The empirical results of hardness values were compared with the values of experimental hardness for validity.

show abstract

“…carried out extensive experimental studies on the cross-sectional resultant residual stresses in roll formed square hollow sections. In their study to introduce a new verification technique, (Muller et al, 2011) presented a 2D FE analysis of roll forming of a Vband that predicts the equivalent plastic strain (PEEQ) in the cross section, which was then compared with measured hardness values from the experiments. The relationship between plastic strain and hardness was extracted experimentally.…”

Section: Introductionmentioning

confidence: 99%

Micro-indentation based study on steel sheet degradation through forming and flattening: Toward a predictive model to assess cold recyclability

Falsafi

Demirci

2016

Materials & Design

View full text Add to dashboard Cite

Article history:In Cold Roll Forming (CRF) process sheet material undergo a complex set of deformation that entail complicated through thickness residual deformation. This paper, focuses on material behaviour in CRF processes, with regarding damage and material degradation. A roll forming process is taken as case study and experimental investigation using extensive microhardness mapping alongside FE simulation of the process are the basis of material damage study. Indentation on different cross-sectional cutting angles -45, 0, 45 has been performed to study the sensitivity to orientation and crystallographic texture. A 3D Finite Element simulation with emphasis on through-thickness variation of the plastic deformation was carried out, using multiple layers of solid elements representing the sheet. A smart approach to reduce computational cost was employed in MSC.Marc by implementing simulation of a master model of complete material with shell elements, followed by partial submodelling comprising solid elements in regions of interest. This cross-sectional hardness map was then converted to the corresponding equivalent plastic strain in the cross section for validation. The correlation factor between Hardness and yield stress was discussed.

show abstract

Predicting plastic deformation and work hardening during V-band formation

Cited by 23 publications

References 31 publications

Full-field measurement of residual strains in cold bent steel plates

Full-field measurement of residual strains in cold bent steel plates

Modeling of anisotropic behavior to investigate the effect of hardness on AA2014 aluminum alloys under upsetting

Micro-indentation based study on steel sheet degradation through forming and flattening: Toward a predictive model to assess cold recyclability

Contact Info

Product

Resources

About