Cave Shoes, Though Fashionable, Pay Attention To Skid Resistance.

< p > rain in summer, many people choose to wear fashionable plastic bottom < a href= "http://www.91se91.com/news/index_x.asp" > cave shoes < /a > travel.

However, plastic shoes with holes in the floor are just like ice skates on ice. Have you tried? Journalists try to wear different types of shoes, and walk through different materials such as asphalt road, granite, marble and floor tiles. What kind of soles are the most slippery? What kind of floor is the most slippery? < /p >

< p > < strong > Experiment 1 < /strong > < /p >.

< p > < strong > the surface of marble is most slippery > /strong > /p >.

< p > first, journalists wearing the same pair of plastic shoes at the bottom of the hole, after the morning rain, have chosen three different ground to try: asphalt road, granite, marble floor tiles.

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< p > at the entrance of a supermarket, the floor is covered with large area of granite floor tiles.

Accumulated a layer of water, reporters wearing plastic slippers step up, suddenly there is a feeling of wearing ice skates walking on the ice.

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< p > the reporters at the two outlets of the supermarket did not see any anti-skid measures. Only one of the exports saw a warning sign of "slippery and slippery".

In addition, most of the shops on the street are rock steps and are very slippery.

"It's even more dangerous for the elderly to go through the rainy days," Liu told reporters. "I hope the relevant departments can lay a slip mat on the steps."

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< p > how slippery is the floor tiles and granite? The reporter searched some information.

The friction coefficient of smooth tiles and granite is less than 0.5 according to the relevant technical standards of the state.

And how to understand less than 0.5, Shenyang University of Technology physics department Li said that the friction coefficient is less than 0.5, basically is not skid resistant.

When it rains, the friction coefficient will be even smaller.

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< p > < strong > experiment two < /strong > < /p >

< p > < strong > the anti slip coefficient of mountaineering shoes is the highest < /strong > < /p >

< p > select a 30 degree slope marble floor, and invite pedestrians wearing different styles of shoes.

Results the order of wet slippery degree from big to small is as follows: 1. flip flops.

Fashionable young people love most, men and girls wear the most; 2. hole shoes.

It is the most popular kind nowadays. There are several round holes in the vamp, round toe and a belt on the heel.

3. high heels.

Its style is quite common. The forehand part is thin, with some shallow horizontal groove anti slip stripes, with a height of about 5 centimeters.

4. casual shoes.

The sole is beef tendon fabric, and its skid resistance is better at ordinary times.

However, in actual observation, it was found that when the bottom of cattle tendon was wet and there was water accumulation on the road surface, the skid resistance capability was greatly reduced.

5. sports shoes.

< a href= "http://www.91se91.com/news/index_s.asp" > sole > /a > with deep grooves and deep sole and deep groove, the skid shoes can ensure a gap between the sole and the ground, and it is not easy to slip.

6. mountaineering shoes.

The pattern of the sole is specially designed, and different patterns have many different functions, which can prevent skid and relieve the pressure on the sole and knees of the floor.

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< p > < strong > expert analysis < /strong > < /p >.

< p > < strong > physical point of view skid resistance < /strong > < /p >

< p > people feel that the more patterns on the sole, the more slippery it is.

In fact, this is not absolute.

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< p > the Physics Department of Shenyang University of Technology, Liu said, through experiments, we can see that the larger the friction force of the soles is, the shorter the distance is, and the skid resistance of the shoes is relatively good.

The larger the actual area of contact with the ground, the greater the friction.

Because the material and hardness of the sole are different, the instantaneous deformation of the material is different, so the actual contact area is different.

Usually, the actual contact area of the softer material will increase, so the friction will be higher and the skid resistance will be improved.

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< p > the pattern of the sole can effectively increase the contact area between the shoes and the road surface. On the surface of some gravel, soil and lawn, the raised patterns of the sole can penetrate into the soft pavement, so that the vertical part of the raised pattern is also contacted with the ground, thus greatly increasing the friction force.

On the street and even on the tile floor, the surface is very hard. The pattern of the sole makes the contact area between the shoe and the ground smaller and the friction force also decreases significantly.

Therefore, the pattern of the sole is not necessarily the more, the better, the deeper, the more slippery. The material of the sole is soft and resilience is good. This kind of < a href= "http://www.91se91.com/news/index_h.asp" > the sole slip resistance is better than /a.

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< p > besides, the softness and hardness of the sole affect the deformation of the sole.

For soft soles, it can increase the contact area and increase the friction force, but for the hard soles, the deformation is very small. Therefore, the shoes with soft soles on the hard road must be more frictional than those with hard soles.

Therefore, the soft soles of shoes have better skid resistance than those with hard soles.

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