The environment shear stress field for the 1976 Tangshan earthquake sequence

1994 ◽  
Vol 7 (4) ◽  
pp. 549-557 ◽  
Author(s):  
Pei-Shan Chen ◽  
Lei Xiao ◽  
Tong-Xia Bai ◽  
Xi-Li Wang
Keyword(s):  
Shear Stress ◽  
Stress Field ◽  
Earthquake Sequence ◽  
Tangshan Earthquake ◽  
Shear Stress Field

Cell adhesion on gaseous plasma modified poly-(l-lactide) surface under shear stress field

Biomaterials ◽  
2003 ◽  
Vol 24 (21) ◽  
pp. 3757-3764 ◽  
Author(s):  
Yuqing Wan ◽  
Jian Yang ◽  
Junlin Yang ◽  
Jianzhong Bei ◽  
Shenguo Wang
Keyword(s):  
Shear Stress ◽  
Cell Adhesion ◽  
Stress Field ◽  
Gaseous Plasma ◽  
Shear Stress Field

An Evaluation of a Modified Iosipescu Specimen for Measurement of Elastic-Plastic Properties of Solder Materials

2010 ◽  
Author(s):  
Subhasis Mukherjee ◽  
Abhijit Dasgupta
Keyword(s):  
Shear Stress ◽  
Stress Field ◽  
Solder Joint ◽  
Scale Effects ◽  
Element Model ◽  
Test Material ◽  
Plastic Properties ◽  
Elastic Plastic ◽  
Uniform Shear ◽  
Shear Stress Field

There are various specimen configurations available in the literature for characterizing the mechanical behavior of solder interconnect materials. An ideal test specimen should use a simple geometry to minimize the complexity of the stress analysis and which produces a uniform material response throughout the test material. In the thermo-mechanical micro scale (TMM) test used in this study, we use a simple, notched shear specimen, based on a concept originally proposed by Iosipescu [1967] [1], which produces a very uniform shear stress field in the solder joint volume [Reinikainen et al., 1998] [2]. Our modified Iosipescu specimen comprises of two oxygen free, high conductivity (OFHC) copper platens soldered together and loaded in simple shear. The solder joint in this specimen is only 180 microns wide to capture the length scale effects of functional solder interconnects. This study examines the effects of dimensional variabilities of this modified Iosipescu specimen on the shear stress distribution in the solder joint. Variabilities encountered in these specimens include: (i) fillets at the V-notches, caused by excess solder; (ii) offset between the two copper platens along the loading direction; (iii) taper of the solder joint due to lack of parallelism of the edges of the copper platens; and (iv) misalignment between the specimen centerline and loading axis of the TMM test frame due to mounting variability. Detailed parametric studies of these four dimensional variations in the TMM specimen are conducted using a simple two-dimensional elastic-plastic finite element model. The uniformity of the shear stress field in the specimen is investigated and the variation in the derived stress-strain curves is examined, as a function of the dimensional variabilities described above.

scholarly journals Investigation on Void Effect on Shear Stress Field in Bonded Stepped-Lap Joint

2016 ◽  
Vol 13 (2) ◽  
pp. 331-343 ◽  
Author(s):  
Behnam Ghoddous ◽  
Mohamad Shishehsaz
Keyword(s):  
Shear Stress ◽  
Stress Field ◽  
Lap Joint ◽  
Void Effect ◽  
Shear Stress Field

Quantification and significance of fluid shear stress field in biaxial cell stretching device

2010 ◽  
Vol 10 (4) ◽  
pp. 559-564 ◽  
Author(s):  
Mark S. Thompson ◽  
Stuart R. Abercrombie ◽  
Claus-Eric Ott ◽  
Friederike H. Bieler ◽  
Georg N. Duda ◽  
...  
Keyword(s):  
Shear Stress ◽  
Stress Field ◽  
Fluid Shear Stress ◽  
Fluid Shear ◽  
Cell Stretching ◽  
Shear Stress Field

Morphology and rheology of PP/POE blends in high shear stress field

2017 ◽  
Vol 31 (9) ◽  
pp. 1263-1280 ◽  
Author(s):  
Jiru Ying ◽  
Xiaolin Xie ◽  
Shaoxian Peng ◽  
Huamin Zhou ◽  
Dequn Li
Keyword(s):  
Shear Stress ◽  
Shear Rate ◽  
Stress Field ◽  
Polymer Blends ◽  
Morphological Evolution ◽  
High Shear Rate ◽  
Dispersed Phase ◽  
High Shear ◽  
High Shear Stress ◽  
Shear Stress Field

Polypropylene (PP)/polyolefin elastomer (POE; ethylene–octene copolymer) blends with varying weight percentages of POE were prepared in a twin-screw extruder and molded through high shear rate injection-molding process. The morphologies and rheology of the PP/POE blends were systematically investigated based on rheological data and experimental analysis. The results indicate that the polymer blends of plastic and rubber in a high shear stress field result in a multilayered microstructure, which can be divided into skin, transitional, shear, and core layers according to the morphology of the dispersed phase. The morphology formation of the dispersed phase depends on the shear field and temperature field in the processing. Morphological evolution of the dispersed POE phases in PP matrix was described and quantified. A dragging ellipsoid model and capillary number were employed to describe the morphological evolution of the dispersed phase, and the morphological parameters were obtained. The results show that the dragging ellipsoid model is well suited to explain the morphological evolution of the dispersed phase in polymer blends molded under high shear rate.

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