Shear testing
Pro Research Analysisby 
Searched over 200M research papers for "Shear testing"
Advances in Shear Testing for Material Characterization
Introduction to Shear Testing
Shear testing is a critical method for characterizing the mechanical properties of materials, particularly in understanding their behavior under shear stress. This testing is essential for applications in sheet metal forming, structural engineering, and material science. Various shear test configurations and methodologies have been developed to improve the accuracy and reliability of these tests.
Shear-Compression Specimen (SCS) for Large Strain Testing
A novel shear-compression specimen (SCS) has been introduced to facilitate large strain testing of materials. This specimen features a cylindrical geometry with diametrically opposed slots machined at a 45° angle to the longitudinal axis, forming the test gauge section. Numerical analysis and experimental validation using OFHC copper have shown that while the stress state in the gauge is three-dimensional, the dominant deformation mode remains shear. The SCS allows for testing across a wide range of strain rates, from quasi-static to very high strain rates (up to 2×10^4 s^-1)1.
Quality of Strain State in Simple Shear Testing
Simple shear testing is particularly valuable for sheet metal characterization due to its ability to achieve large deformations without plastic instability. However, achieving theoretical conditions in experimental setups is challenging. Digital image correlation (DIC) has been applied to assess and improve the quality of strain measurements in shear tests. This method helps separate theoretical kinematics from experimental deviations, showing that translational simple shear testing achieves kinematics closer to theoretical expectations compared to pseudo-simple shear testing2.
Comparative Analysis of Shear Test Configurations
Different shear test configurations, such as the Miyauchi test, ASTM standard sample, and in-plane torsion test, have been compared to enhance the understanding of material behavior under shear conditions. Experimental strain distribution measured by DIC and finite element simulations indicate that while specimen geometry has minor effects on stress distribution, the overall macroscopic flow stress vs. strain behavior remains consistent across different geometries. This comparative analysis provides insights into the applicability of various shear tests for material modeling in finite element simulations3.
Development of Simple Shear Test for Work Hardening Measurement
A simple shear test has been developed to measure work hardening in materials, featuring a new strain extensometer based on a rotary angle transducer. Finite element method (FEM) simulations and experimental work have been conducted to evaluate the effect of specimen geometry on shear strain distribution and to correct edge effects. This method has been validated experimentally, providing a reliable approach to measure work hardening in materials4.
Twin Bridge Torsion Shear Test for Sheet Metal Characterization
A new twin bridge torsion shear test has been proposed to address the limitations of existing shear test setups. This test is designed to determine anisotropic yield behavior and characterize prestrained specimens, such as those subjected to cold rolling. The clamping situation and shear gauge dimensions are optimized to ensure high-quality flow curves, making this test suitable for predicting plastic material behavior in sheet forming processes5.
Numerical Examination of Direct Shear Test
Two-dimensional simulations using the discrete element method (DEM) have been employed to study the direct shear test. These simulations reveal heterogeneous stress and strain distributions within the shear zone, with significant dilation observed. The stress ratio calculated from boundary forces is about 10% greater than that within the shear zone. Minimizing wall friction along the specimen's vertical faces can reduce boundary condition effects, ensuring accurate stress-strain-dilation behavior within the shear zone6.
Conclusion
Shear testing remains a vital tool for material characterization, with ongoing advancements in test configurations and measurement techniques. Innovations such as the shear-compression specimen, digital image correlation, and new shear test setups continue to enhance the accuracy and reliability of shear tests. These developments provide deeper insights into material behavior under shear stress, aiding in the design and analysis of materials for various engineering applications.
Sources and full results
Most relevant research papers on this topic
A shear-compression specimen for large strain testing
The shear-compression specimen (SCS) provides a three-dimensional stress state for large strain testing of materials, with uniform stresses and strains across a wide range of strain rates.
Highly CitedQuality of the strain state in simple shear testing using field measurement techniques
Digital image correlation improves the quality of shear testing on dual phase steel, achieving closer kinematics to theory than pseudo-simple testing and identifying strains independently of experimental biases.
An experimental and numerical investigation of different shear test configurations for sheet metal characterization
The Miyauchi, ASTM standard, and in-plane torsion tests for sheet metal characterization show no significant influence of specimen geometry on stress distributions under shear stress, with minor differences in numerical results.
Highly CitedDevelopment of simple shear test for the measurement of work hardening
The simple shear test with a new strain extensometer can accurately measure work hardening, with a validation method for specimen geometry-based edge effect correction.
A New Shear Test for Sheet Metal Characterization
The new twin bridge torsion shear test effectively determines anisotropic yield behavior and characterizes prestrained sheet metal specimens for sheet metal characterization in finite element simulation.
Highly CitedA numerical examination of the direct shear test
The dilation inside the shear zone is much greater than that deduced from boundary measurements, and coaxiality of stress and strain rate exists at the critical state.
Highly CitedThe Shear Testing Programme – I. Weak lensing analysis of simulated ground-based observations
Current ground-based weak lensing methods achieve percent level accuracy, with calibration uncertainties being the dominant source of measurement error.
Highly CitedA review of nonlinear oscillatory shear tests: Analysis and application of large amplitude oscillatory shear (LAOS)
Large amplitude oscillatory shear (LAOS) tests are a more effective method for investigating and quantifying nonlinear viscoelastic behavior of complex fluids, offering a more comprehensive rheological model and advanced quality control.
Highly CitedDirect shear tests on reinforced sand
Direct shear tests on reinforced sand reveal that conventional analysis underestimates frictional shearing resistance by about 20%, with plastic incremental strains dominating deformation and the maximum bond angle of friction determined by plastic deformation in the sand.
Highly CitedA Shear-Tension Specimen for Large Strain Testing
The new shear-tension specimen (STS) effectively studies the combined influence of tension and shear on the mechanical characteristics of materials, with no necking or softening observed.
Try another search
what is the importance of a inclusive school climate for refugee from different cultures?
social psychology
What is the impact of technology on the future of libraries and access to information and knowledge?
What is the impact of digital competence on firm performance?
What is the Ethnographic studies on digital nomads?
research about technology - asean