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We tend to think of glass as fragile–but in fact, glass is pretty strong stuff.
我們往往認(rèn)為玻璃是易碎的，而事實(shí)上，玻璃十分堅(jiān)固。
A flawless fiber of glass pulled lengthwise is five times stronger than steel!
將一根完整的玻璃纖維縱向拉長(zhǎng)后，其堅(jiān)固程度是鋼的5倍！
Although glass is quite strong, it’s also very brittle–and the brittleness explains why glass breaks so easily.
玻璃雖然十分堅(jiān)固，但也很脆弱——這也是玻璃容易破碎的原因。
But windshields in cars and airplanes are much more resistant to breaking than regular glass.
但汽車(chē)和飛機(jī)的擋風(fēng)玻璃比普通玻璃更為堅(jiān)韌。
What Makes Windshield Glass So Tough?
為何擋風(fēng)玻璃如此結(jié)實(shí)呢？
Glass is commonly made more resistant to breaking in one of two ways: by tempering or by laminating it.
制造更牢固的玻璃通常有兩種辦法：鋼化或?qū)訅骸?/div>
Tempered glass is first heated just below melting, then exposed to bursts of cold air.
制造鋼化玻璃首先是將玻璃加熱接近其熔點(diǎn)，然后再將其暴露再冷空氣中。
The cold cools and shrinks the surface of the glass faster than the inside, compressing the surface inward.
低溫導(dǎo)致玻璃表層比內(nèi)部更快冷卻和收縮。
This more dense, inwardly compressed surface makes the glass stronger, so it takes a lot more force to break it.
由于密度增加，表面收縮內(nèi)陷，玻璃的強(qiáng)度逐漸增加，因此玻璃更不易破碎。
譯文為可可英語(yǔ)翻譯，未經(jīng)授權(quán)請(qǐng)勿轉(zhuǎn)載!
