RUBBER IS DUCTILE DUE TO ITS SPECIAL PROPERTY OF ELASTICITY. AND ACCORDING TO YOUNG’S MODULUS, THE ELASTIC PROPERTY OF RUBBER IS HIGH.. BUT AFTER REACHING THE FRACTURE POINT THE ELASTIC LIMIT OF RUBBER ENDS.

The ductility is the percent elongation at failure and indicates that the general ability of the material to be plastically deformed. The toughness is used to describe the combination of strength and ductility. This is defined as total area under the stress-strain curve.

Difference between Ductile and Brittle Materials with Stress Strain Curve. The materials that undergoes plastic deformation before fracture are ductile while the materials which have no plastic deformation are brittle i.e. they break instantly.

Solid materials that can undergo substantial plastic deformation prior to fracture are called ductile materials. Solid materials that exhibit negligible plastic deformation are called brittle materials. Brittle materials fail by sudden fracture (without any warning such as necking).

In contrast, ductility is the ability of a solid material to deform under tensile stress. Practically, a ductile material is a material that can easily be stretched into a wire when pulled as shown in the figure below.

Now, to answer the question, examples of brittle material include:

• metal.
• glass.
• plastic.
• Cast Iron.
• Cast aluminium.
• Tungsten Carbide.
• dried clay.

In addition, since the failure of chalk happens suddenly without much deformation (strain), it is called a “brittle material”.

Brittle materials do not undergo significant plastic deformation. They thus fail by breaking of the bonds between atoms, which usually requires a tensile stress along the bond. Micromechanically, the breaking of the bonds is aided by presence of cracks which cause stress concentration.

Most non-metallic objects are brittle. Glass, dinner plates, bricks, rocks, drywall, and almost all ceramic products are brittle.

Diamonds are brittle precisely because they are so hard! Hardness is the ability of a material to resist plastic deformation. Atoms in diamond are held together by extremely strong covalent bonds, making them extremely hard. Because of this, diamond has no way of absorbing energy.

Malleability is a substance’s ability to deform under pressure (compressive stress). Examples of malleable metals are gold, iron, aluminum, copper, silver, and lead. Gold and silver are highly malleable. When a piece of hot iron is hammered it takes the shape of a sheet. The property is not seen in non-metals.

The World’s Strongest Stuff

• Diamond. Unmatched in its ability to resist being scratched, this much-loved gemstone ranks the highest in terms of hardness.
• Graphene.
• Spider silk.
• Carbon/carbon composite.
• Silicon carbide.
• Nickel-based super-alloys.

Diamond

The True Strength of Snails’ Teeth Limpet teeth have a tensile strength that ranges from 3 to 6.5 gigapascals. Limpet teeth aren’t as hard as diamonds are, but diamonds also aren’t grown as parts of biological organisms, which makes limpets the king of the who-has-the-strongest-body-part contest.

Your 12 molars are your biggest and strongest teeth. You have six on the top and six on the bottom. The main eight molars are sometimes divided into your 6-year and 12-year molars, based on when they typically grow in. The large surface area of your molars helps them grind up food.

Snails Bite: Is it painful, or does it hurt? It is estimated that snails have about 14,000 teeth called the Radula. When holding a garden snail, it might feel like sandpaper scraping on your skin; it doesn’t hurt. Only a family of tropical marine snails bite are painful when they forcefully bite your skin.

Snails teeth are not like regular teeth. A snail’s teeth are arranged in rows on its tongue. A garden snail has about 14,000 teeth while other species can have over 20,000.

Snails have a lot to think about when they make love—because they’re hermaphrodites. But animals with simple nervous systems, like lobsters, snails and worms, do not have the ability to process emotional information and therefore do not experience suffering, say most researchers.

GALS aren’t poisonous but it is possible for them to transmit disease, especially when their mucus is used in topical treatments or the snails are eaten raw.

Snails have poor eyesight, but an amazing sense of smell. This is how they will recognize you. They like to have their shells rubbed. They also like to be rubbed around the head and neck.

That activity is indicating that the Snail is indeed happy. A Snail that sits in his shell for a long time must be checked to see if it is still alive. If you can’t see him sticking out of his shell pull him up and glance at the bottom of the shell. It’s not necessary to pull the Snail out of the water to do this.

Lifespan. Most species of land snail are annual, others are known to live 2 or 3 years, but some of the larger species may live over 10 years in the wild. For instance, 10-year old individuals of the Roman snail Helix pomatia are probably not uncommon in natural populations.

How to Kill Slugs and Snails

1. Scissors and Spades: A Quick, ‘Humane’ Death?
2. Slug Baits/Pellets: A Slow, Painful Death.
3. Salt: A Cruel Death.
4. Boiling Water: A Hot Death.
5. Freezing: A Cold Death.
6. Beer Traps: Death by Drowning.
7. Parasites: Death from Within.
8. Being Eaten: A Natural Death.

Snails’ homing instinct can be overcome, if you move them 20m away. If snails are put far enough away from their home patch, they are unlikely to return, research shows. New research shows that this is exactly the right approach – but only if you can throw far enough.

Any offenders hiding beneath can be collected or squished. Wear gloves while searching and plop all finds in a bucket of soapy water. We consider this the most humane disposal method but slugs can also be sliced, crushed or sprayed with diluted ammonia. Just don’t spray that ammonia directly on any plants.

Much like our own finger nails a snail’s shell forms part of its body. If this shell becomes significantly broken then the snail will die. Whilst they can repair small cracks and holes if the break is serious then they will die as the shell not only provides protection but also prevents the snail from drying out.