The windshield is generally durable and lasting, and a light touch can make it explode into a thousand pieces? Stress, moisture, and cracks created by fatigue and pressure. The reality may be very different, and its real resistance to any impact. No matter how small, or maybe wholly broken and endanger your safety and that of those who travel with you.
If this is the case, you need to get in touch with windshield replacement services immediately. At Yellow Stone Auto Glass, the team of experts offer five-star glass repair services including windshield replacement mobile service for your convenience.
What causes the windshield to crack?
The actual resistance of glass is much lower than its theoretical resistance. This is what explains the anomalies that we often perceive the different mechanisms that cause a windshield to break. The first theory that was published to try to explain why glass fracture (A.A. Griffith, 1921) already made it clear: the stress required for an impact to enlarge is inversely proportional to the size of the impact. That is, the greater the damage, the less force will be necessary to increase its size. In short, as the size of the impact increases, the resistance of the windshield.
This means that any micro-breakage, those that are practically not appreciated with the naked eye sometimes even by checking the windshield, may have broken its resistance entirely from receiving impacts. Another factor that also affects the deterioration of the resistance of the glass is the existing humidity. A 1967 study (S. Wiederhorn) delved in this theory. It showed how with minimal stresses, in the presence of moisture, an impact on a glass grows continuously, without stopping, even if it is the only molecule by molecule.
Common causes of windshield chips
Cracks in the windshield can baffle the most astute vehicle owner, especially when there are no external signs of a hole, splinter, or crack. The next day may bring another alarming revelation; the crack has lengthened and crossed the entire windshield, distorting the vision. The answer lies in a few basic physical facts and also some undeniable reasons.
Direct hit on the road
The most evident and dangerous cracks appear due to random road hits. It is gravel, stones, and rocks were thrown across the street by a car that passed in the opposite direction. These small pits or chips collect moisture, and moisture molecules can expand and contract, pushing the glass in all directions, eventually forming a groove. Such holes and chips, if not repaired immediately, can develop. Do not worry! You now have our windshield replacement mobile service with a replacement windshield warranty.
Most cracks appear close to the edges of the windshield. A thermal effect can cause this during manufacturing. Since the composition of glass consists of particles and not a liquid substance, the particles do not have a stable grip surface at the edge where the glass does not exist. Additionally, the mechanical stress that must be used to force the two pieces of glass together against the interior plastic liner also causes imperfections in and around the edges of the windshield. The very nature of the edge of the windscreen exposes it to more adverse stress as it joins the windshield mounting gallery last.
Variations in temperature that regularly expand and contract the windshield can produce tiny cracks that travel the length of the glass. Suppose the air inside the vehicle registers 75 degrees (23 C) and the outside air temperature reads 30 degrees Fahrenheit (-1 C). In that case, the inner layer of glass can expand while the outer layer of glass contracts, causing a distortion. Call for Glass repair services.
A massive stone-shaped hail deluge can impact glass and cause noticeable chipping and cracking. What’s worse, multiple bumps can pepper the windshield with numerous cracks and sometimes holes, making it useless to repair. Hail damage can be rare, but when present it can be devastating to all the glass panels on the vehicle.
Windshields remain under constant stress from the word go. The cutting of the glass, bending and curvature and even the internal laminate that prevents it from breaking into a thousand pieces if it is cracked make residual stress frozen in the glass from the moment of production. The size, shape, curvature, and even the orientation, inclination and distribution of its masses also generate significant internal stresses. And that tricky balance reached at the time of its production can be lost permanently when the windshield receives an impact, no matter how small.
Another source of stress on windshields comes from their installation in the frame that they must occupy in the car. The adhesives that attach it to the vehicle can also cause additional stresses. This is due both to dimensional tolerances and to the types of adhesives used for their fixation. Each windshield can have a stress pattern precisely because the properties of glass can vary from batch to batch.
The composition of the windshield also suffers the effects of factors such as torsion. It is the bodywork due to the significant G-forces that are generated in the different moments of acceleration, deceleration or when the vehicle takes a curve. Did you know that going through a speed bump at 30 km / h generates a force equivalent to 5 G of acceleration on the windshield?
And we cannot forget that like all metals, the body of the car expands and contracts (even if only in measures less than a millimeter) due to temperature changes. It can grow or contracts the tension and stress suffered by the windshield. That is why sudden changes in temperature, such as those that we cause when in winter we try to defrost the windscreen with hot water or in summer with the air conditioning when we direct the air jets directly towards it, can cause the glass to crack or explode.