Modification of the Shear-Compression Specimen for Large Strain Testing

Dorogoy, A.; Rittel, D.; Godinger, A.

doi:10.1007/s11340-015-0057-6

Cited by 55 publications

(41 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The stress-strain curve significantly differs between cylindrical specimens and SCS. By contrast, previous works on rolled steel reported that consistent results between SCS and cylindrical specimens [5,6,18]. In the present study, the material yield at strain is approximately 0.05 for cylindrical specimens and 0.3 for SCS.…”

Section: Comparison Between Cylindrical Specimens and Scscontrasting

confidence: 94%

See 1 more Smart Citation

Mechanical analysis of PA66 under combined shear–compression

et al. 2017

View full text Add to dashboard Cite

The large-strain mechanical behavior of PA66 was investigated using shear-compression specimens (SCS) with two opposite slots machined at different angles (15°, 30°, 45°, and 50°). Results show that strain rate and slot angle affect the equivalent stress in different levels. Slot angle sensitivity affects both flow stress and hardening characteristics, and strain rate influences elastic deformation. Increasing the strain rate gradually increases the equivalent stress. SCS with a slot angle of 30°exhibits the largest equivalent stress and the greatest effect of strain rate. The stress-strain curve differs between cylindrical specimens and SCS under quasi-static conditions. The yield stress obtained by the cylindrical specimens is higher than that of SCS. A constitutive model is modified based on the Drucker-Prager criterion to describe the effect of hydrostatic pressure and strain rate on the equivalent yield stress of polymer materials. The theoretical formula predictions are consistent with experimental results, thereby confirming the feasibility of this constitutive relationship.

show abstract

Section: Comparison Between Cylindrical Specimens and Scscontrasting

confidence: 94%

“…This study presented the relationship of equivalent stress to applied load and the constants required by the test. To eliminate stress concentration in the fillet regions of the gauge section, Dorogoy et al [6]. developed SCS geometry by using two diametrically opposed semi-circular slots (instead of rectangular).…”

Section: Introductionmentioning

confidence: 99%

Mechanical analysis of PA66 under combined shear–compression

et al. 2017

View full text Add to dashboard Cite

show abstract

“…The failure patterns of the STS specimens is different from that of an SCS specimen [28,30]. In the STS, a crack initiates at the center of the gauge and propagates toward its ends, while in SCS specimen the opposite happens, namely the crack starts at the ends and propagates towards the center.…”

Section: Numerical Resultsmentioning

confidence: 93%

“…The specimen is similar to the known shear compression specimen (SCS) which was introduced in [16] and was validated numerically for static and dynamic loading and parabolic hardening materials in [17][18][19]. The SCS was used in several investigations [20][21][22][23][24][25][26][27] and was recently modified to have a circular gauge [28]. The STS consists of a long cylinder having an inclined gage section created by two diametrically opposed semi-circular slots which are machined at 45°with respect to the longitudinal axis.…”

Section: Introductionmentioning

confidence: 99%

A Shear-Tension Specimen for Large Strain Testing

2015

Self Cite

View full text Add to dashboard Cite

A new shear-tension specimen (STS) is designed, evaluated and tested quasi-statically and dynamically. The specimen consists of a long cylinder having an inclined gauge section created by two diametrically opposed semi-circular slots which are machined at 45°with respect to the longitudinal axis. The geometry imposes stress condition within the gauge section which correspond to a Lode parameter of− 0.5, between pure shear (0) and uniaxial tension (−1). It thus provides a wider span of loading conditions for a material. A thorough numerical study reveals that the stresses and strains within the gauge are rather uniform, and the average Mises stress and plastic strain on the mid-section of the gauge represent the material true stress-strain characteristics. The data reduction technique to determine the stresses and strains is presented. Quasi-static and dynamic tests at strain rate of 10 4 1/s were carried out on specimens made of 1020 cold-rolled steel. No necking or softening was observed with this specimen, and the fracture location was always well within the gauge. The obtained stress-strain curves and ductility were validated numerically. The STS is a new specimen to study the combined influence of tension and shear on the mechanical characteristics of a material.

show abstract

“…A miniature version of the shear-compression specimen was used for the characterization of nanomaterials. The modified shear-compression specimen was presented in [20]. In the modified specimen, the two diametrically machined gauges were semi-circular (instead of rectangular).…”

Section: Introductionmentioning

confidence: 99%

FE Simulation of the Stress-Strain State during Shear-Compression Testing and Asymmetric Three-Roll Rolling Process

et al. 2017

View full text Add to dashboard Cite

Abstract.A three-roll rolling process is a significant technique in the production of wire rod, round bars and hexagonal profiles for structural applications. Better mechanical properties of wire rod, round bars and hexagonal profiles can be achieved due to large plastic deformation by the three-roll rolling process. Asymmetric rolling is a novel technique characterized by a kinematic asymmetry linked to the difference in peripheral speed of the rolls, able to introduce additional shear strains through the bar thickness. Physical simulation of shear strain, which is similar to that occurring in asymmetric three-roll rolling process, is very important for design of technology of producing ultrafine grain materials. Shear testing is complicated by the fact that a state of large shear is not easily achievable in most specimen geometries. Application of the shear-compression testing and specimen geometry to physical simulation of asymmetric three-roll rolling process is discussed in the paper. FEM simulation and comparison of the stress-strain state during shear-compression testing and asymmetric three-roll rolling process is presented. The results of investigation can be used to optimize the physical simulation of asymmetric three-roll rolling processes and for design of technology of producing ultrafine grain materials by severe plastic deformation.

show abstract

Modification of the Shear-Compression Specimen for Large Strain Testing

Cited by 55 publications

References 27 publications

Mechanical analysis of PA66 under combined shear–compression

Mechanical analysis of PA66 under combined shear–compression

A Shear-Tension Specimen for Large Strain Testing

FE Simulation of the Stress-Strain State during Shear-Compression Testing and Asymmetric Three-Roll Rolling Process

Contact Info

Product

Resources

About