Abstract We study the friction when a rectangular tire tread rubber block is sliding on an ice surface at different temperatures ranging from −38 to −2 °C, and speeds 3 µm/s 1 cm/s. At low we propose that important contribution force due slip between fragments attached surface. above −10 °C or for high enough speeds, thin premelted water film occurs shearing area of real contact small. In this ...

many studies have been conducted focusing on the effects of friction coefficient or texture depth on the highway accident risk. however, combined effects of these parameters have not been still addressed. in this research the interaction between friction coefficient, texture depth and accident rate in 30 freeway sections were examined. the accident data were gathered and an apparatus was design...

The present study examined whether a new footwear outsole with tread blocks and a hybrid rubber surface pattern, composed of rough and smooth surfaces, could increase slip resistance and reduce the risk of fall while walking on a wet floor surface. A drag test was performed to measure static and dynamic coefficient of friction (SCOF and DCOF, respectively) values for the footwear with the hybri...

in the present research, the physical, nutritional and chromatic properties of strawberry (fragaria xananassa), selva cultivar were studied. the values for mass, diameter, length, geometric meandiameter and sphericity of strawberry fruit at 91.07% moisture content (d.b.) were 11.885 g, 28.260mm 29.697 mm, 28.585 mm and 0.971 respectively. at the same moisture content, volume, truedensity, bulk ...

physical properties of four common iranian varieties of canola seeds (hyola, okapi, orient and slm) were evaluated as a function of their moisture contents. the average seed length and thousand seed mass varied linearly from 1.925 to 2.262 mm and from 3.06 to 4.84 g, respectively. the average diameter, geometric mean diameter, and sphericity varied non-linearly from 1.475 to 1.911 mm, 1.625 to ...