Influence of the load history on the edge strength of glass with arrised and ground edge finishing

2013 ◽  
Vol 104 ◽  
pp. 29-40 ◽  
Author(s):  
Marc Vandebroek ◽  
Jan Belis ◽  
Christian Louter ◽  
Robby Caspeele
Keyword(s):  
Load History ◽  
Edge Strength ◽  
Edge Finishing

scholarly journals Edge strength of core drilled and waterjet cut holes in architectural glass

2021 ◽  
Author(s):  
Kay Sanders ◽  
Freek Bos ◽  
Erwin ten Brincke ◽  
Jan Belis
Keyword(s):  
Ultimate Load ◽  
Tensile Tests ◽  
Round Hole ◽  
Glass Pane ◽  
Double Ring ◽  
Edge Strength ◽  
Hole Area ◽  
Edge Finishing ◽  
Hard Contact ◽  
Panel Thickness

AbstractIn structural glass design, an often-applied connection is a bolted connection subjected to in-plane tensile loads. Traditionally, the hole in the glass pane is manufactured by core drilling and conical edge finishing. An alternative method is by waterjet cutting the holes, resulting in cylindrically shaped holes. This research compares the edge strength of core drilled and waterjet cut holes. It focuses on in-plane tensile tests and consists of an experimental part in combination with a numerical part. In the in-plane tensile tests, peak stresses occur perpendicular to the load direction. These stresses are found to be higher for waterjet cut holes (+ 13%) compared to core drilled holes. As a result, the characteristic ultimate load is lower for waterjet cut holes (− 16%). Furthermore, the influence of thermally toughening the glass is found to be more favourable for the characteristic ultimate load of specimens containing core drilled holes than it is for waterjet cut holes. Next to that, it was found that the ultimate load linearly increases with the panel thickness. Eccentric loading, caused by insufficient bushing material or rotation of the bolt, only slightly decreases the ultimate load, provided that no hard contact between bolt and glass occurs. In addition, coaxial double ring tests were performed in the hole area, showing that waterjet cut holes result in larger stresses near the hole edge than core drilled holes. Furthermore, waterjet cut holes are found not to be perfectly round, while drilled holes are. This un-roundness negatively influences the ultimate load and the stresses in the glass; the larger the extent of un-roundness, the higher the stresses and the lower the ultimate load. Also, the orientation of the un-round hole is of influence on the stresses and ultimate load for the tensile test. It is concluded that waterjet cut holes result in lower characteristic ultimate loads and higher stresses. Due to the different edge finishing, the ultimate load still is lower compared to core drilled holes, even if the waterjet cut holes are perfectly round.

Experimental validation of edge strength model for glass with polished and cut edge finishing

2012 ◽  
Vol 96 ◽  
pp. 480-489 ◽  
Author(s):  
Marc Vandebroek ◽  
Jan Belis ◽  
Christian Louter ◽  
Gustaaf Van Tendeloo
Keyword(s):  
Experimental Validation ◽  
Strength Model ◽  
Cut Edge ◽  
Edge Strength ◽  
Edge Finishing

Size effect model for the edge strength of glass with cut and ground edge finishing

2014 ◽  
Vol 79 ◽  
pp. 96-105 ◽  
Author(s):  
Marc Vandebroek ◽  
Christian Louter ◽  
Robby Caspeele ◽  
Frank Ensslen ◽  
Jan Belis
Keyword(s):  
Size Effect ◽  
Edge Strength ◽  
Effect Model ◽  
Edge Finishing ◽  
Size Effect Model

Application of the Strip Yield Model to Crack Growth Predictions for Structural Steel

2010 ◽  
Vol 57 (1) ◽  
pp. 1-20
Author(s):  
Małgorzata Skorupa ◽  
Tomasz Machniewicz
Keyword(s):  
Structural Steel ◽  
Crack Growth ◽  
Model Calibration ◽  
Load History ◽  
Yield Model ◽  
Variable Amplitude Loading ◽  
Variable Amplitude ◽  
Constraint Factors ◽  
Strip Yield Model ◽  
Closure Mechanism

Application of the Strip Yield Model to Crack Growth Predictions for Structural SteelA strip yield model implementation by the present authors is applied to predict fatigue crack growth observed in structural steel specimens under various constant and variable amplitude loading conditions. Attention is paid to the model calibration using the constraint factors in view of the dependence of both the crack closure mechanism and the material stress-strain response on the load history. Prediction capabilities of the model are considered in the context of the incompatibility between the crack growth resistance for constant and variable amplitude loading.

UNICUT

Alloy Digest ◽  
1953 ◽  
Vol 2 (12) ◽  
Keyword(s):  
High Speed ◽  
High Speed Steel ◽  
Heat Treating ◽  
Edge Strength

Abstract UNICUT is a molybdenum-tungsten type of high-speed steel containing relatively high percentages of carbon and vanadium. It possesses extremely high edge strength at high hardnesses. This datasheet provides information on composition and hardness. It also includes information on forming, heat treating, machining, and joining. Filing Code: TS-14. Producer or source: Cyclops Corporation.

AL TECH D-5

Alloy Digest ◽  
1980 ◽  
Vol 29 (11) ◽  
Keyword(s):  
Fracture Toughness ◽  
Physical Properties ◽  
Abrasion Resistance ◽  
Heat Treating ◽  
High Carbon ◽  
Die Steel ◽  
High Chromium ◽  
Die Steels ◽  
Edge Strength ◽  
Specialty Steel

Abstract AL Tech D-5 is a high-carbon, high-chromium tool and die steel; it contains cobalt (3.30%) and is air-hardening and nondeforming. The cobalt impacts a pronounced secondary hardening effect in tempering and a non-galling effect. AL Tech D-5 has both superior abrasion resistance and greater edge strength than ordinary high-carbon, high-chromium die steels. It is used for many types of dies, hot-piercing punches and shear blades. This datasheet provides information on composition, physical properties, and hardness as well as fracture toughness. It also includes information on forming, heat treating, and machining. Filing Code: TS-372. Producer or source: AL Tech Specialty Steel Corporation.

scholarly journals Superpixel Segmentation Based on Anisotropic Edge Strength

2019 ◽  
Vol 5 (6) ◽  
pp. 57 ◽  
Author(s):  
Gang Wang ◽  
Bernard De Baets
Keyword(s):  
Distance Measure ◽  
Saliency Detection ◽  
Experimental Results ◽  
Segmentation Method ◽  
Superpixel Segmentation ◽  
Gaussian Kernels ◽  
First Derivative ◽  
Edge Strength

Superpixel segmentation can benefit from the use of an appropriate method to measure edge strength. In this paper, we present such a method based on the first derivative of anisotropic Gaussian kernels. The kernels can capture the position, direction, prominence, and scale of the edge to be detected. We incorporate the anisotropic edge strength into the distance measure between neighboring superpixels, thereby improving the performance of an existing graph-based superpixel segmentation method. Experimental results validate the superiority of our method in generating superpixels over the competing methods. It is also illustrated that the proposed superpixel segmentation method can facilitate subsequent saliency detection.

On the Measurement of Material Creep Parameters by Nanoindentation

2004 ◽  
Vol 841 ◽  
Author(s):  
J. A. LaManna ◽  
W. C. Oliver ◽  
G. M. Pharr
Keyword(s):  
Material Constant ◽  
Uniaxial Stress ◽  
Complete Characterization ◽  
Indentation Load ◽  
Amorphous Selenium ◽  
Load History ◽  
Time Data ◽  
Creep Equation ◽  
Uniaxial Creep ◽  
Material Creep

ABSTRACTPrevious studies of how material creep parameters can be measured by nanoindentation testing have focused mostly on measurement of the stress exponent for creep, n, and the activation energy, Qc. However, a more complete characterization requires that the material constant A in the uniaxial creep equation εu =Aσn (where εu is the uniaxial strain rate and σ is the uniaxial stress) also be evaluated. Here, we begin to address this issue by performing simple nanoindentation creep experiments in amorphous selenium at temperatures above and below the glass transition. At 35°C and above, the material exhibits a simple linear viscous creep behavior that is load history independent. This allows the parameter A to be determined from the indentation load-displacement-time data by means of an analytical solution. To examine the validity of the approach, values of the parameter A measured in nanoindentation tests are compared to independent measurements obtained in uniaxial tension creep experiments.

Sign in / Sign up

Export Citation Format

Share Document