science

Interface defeat

Interface defeat is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Interface defeat rather than just read about it. In short: Interface defeat is when a ceramic armour system, typically on an armoured fighting vehicle, defeats a kinetic energy penetrator at the ceramic's front surface. Above a certain impact velocity, known as the transition velocity, interface defeat can no longer occur and either penetration or perforation of the ceramic occurs.

Key takeaways

Interface defeat belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Interface defeat to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Interface defeat from memory before moving on to harder problems.

Reference excerpt

Interface defeat is when a ceramic armour system, typically on an armoured fighting vehicle, defeats a kinetic energy penetrator at the ceramic's front surface. Above a certain impact velocity, known as the transition velocity, interface defeat can no longer occur and either penetration or perforation of the ceramic occurs.

References Lundberg, Patrik (2004). "Interface Defeat and Penetration: Two Modes of Interaction between Metallic Projectiles and Ceramic Targets" (PDF). Acta Universitatis Upsaliensis. Retrieved 2016-10-03. {{cite journal}}: Cite journal requires |journal= (help)

Worked examples

Example 1 — a first encounter with Interface defeat

Start with the simplest possible case. Write down what Interface defeat claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Interface defeat before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Interface defeat ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Interface defeat

In research: Interface defeat appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Interface defeat in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Interface defeat is common in secondary-school and first-year university syllabi. It links to neighbouring topics Ballistics, Vehicle armour, so understanding it makes those chapters shorter.
In everyday life: Look for Interface defeat outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Interface defeat” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Interface defeat in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Interface defeat means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Interface defeat out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Interface defeat in simple terms?

Why does Interface defeat matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Interface defeat?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Interface defeat.