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- Impact_(mechanics) abstract "In mechanics, an impact is a high force or shock applied over a short time period when two or more bodies collide. Such a force or acceleration usually has a greater effect than a lower force applied over a proportionally longer period. The effect depends critically on the relative velocity of the bodies to one another.At normal speeds, during a perfectly inelastic collision, an object struck by a projectile will deform, and this deformation will absorb most or all of the force of the collision. Viewed from a conservation of energy perspective, the kinetic energy of the projectile is changed into heat and sound energy, as a result of the deformations and vibrations induced in the struck object. However, these deformations and vibrations cannot occur instantaneously. A high-velocity collision (an impact) does not provide sufficient time for these deformations and vibrations to occur. Thus, the struck material behaves as if it were more brittle than it would otherwise be, and the majority of the applied force goes into fracturing the material. Or, another way to look at it is that materials actually are more brittle on short time scales than on long time scales: this is related to time-temperature superposition.Impact resistance decreases with an increase in the modulus of elasticity, which means that stiffer materials will have less impact resistance. Resilient materials will have better impact resistance.Different materials can behave in quite different ways in impact when compared with static loading conditions. Ductile materials like steel tend to become more brittle at high loading rates, and spalling may occur on the reverse side to the impact if penetration doesn't occur. The way in which the kinetic energy is distributed through the section is also important in determining its response. Projectiles apply a Hertzian contact stress at the point of impact to a solid body, with compression stresses under the point, but with bending loads a short distance away. Since most materials are weaker in tension than compression, this is the zone where cracks tend to form and grow.".
- Impact_(mechanics) thumbnail Concussion_Anatomy.png?width=300.
- Impact_(mechanics) wikiPageID "2325044".
- Impact_(mechanics) wikiPageLength "7077".
- Impact_(mechanics) wikiPageOutDegree "56".
- Impact_(mechanics) wikiPageRevisionID "686385805".
- Impact_(mechanics) wikiPageWikiLink Acceleration.
- Impact_(mechanics) wikiPageWikiLink Ballistics.
- Impact_(mechanics) wikiPageWikiLink Bending.
- Impact_(mechanics) wikiPageWikiLink Bollard.
- Impact_(mechanics) wikiPageWikiLink Brittleness.
- Impact_(mechanics) wikiPageWikiLink Carbon-fiber-reinforced_polymer.
- Impact_(mechanics) wikiPageWikiLink Category:Fracture_mechanics.
- Impact_(mechanics) wikiPageWikiLink Category:Mechanical_failure_modes.
- Impact_(mechanics) wikiPageWikiLink Charpy_impact_test.
- Impact_(mechanics) wikiPageWikiLink Coefficient_of_restitution.
- Impact_(mechanics) wikiPageWikiLink Collision.
- Impact_(mechanics) wikiPageWikiLink Composite_material.
- Impact_(mechanics) wikiPageWikiLink Compression_(physics).
- Impact_(mechanics) wikiPageWikiLink Contact_mechanics.
- Impact_(mechanics) wikiPageWikiLink Cushioning.
- Impact_(mechanics) wikiPageWikiLink Ductility.
- Impact_(mechanics) wikiPageWikiLink Fall_factor.
- Impact_(mechanics) wikiPageWikiLink Fire_hydrant.
- Impact_(mechanics) wikiPageWikiLink Foam.
- Impact_(mechanics) wikiPageWikiLink Force.
- Impact_(mechanics) wikiPageWikiLink Friction.
- Impact_(mechanics) wikiPageWikiLink Hammer.
- Impact_(mechanics) wikiPageWikiLink Impact_wrench.
- Impact_(mechanics) wikiPageWikiLink Impulse_(physics).
- Impact_(mechanics) wikiPageWikiLink Izod_impact_strength_test.
- Impact_(mechanics) wikiPageWikiLink Jerk_(physics).
- Impact_(mechanics) wikiPageWikiLink Kinetic_energy.
- Impact_(mechanics) wikiPageWikiLink Mechanics.
- Impact_(mechanics) wikiPageWikiLink Nail_(fastener).
- Impact_(mechanics) wikiPageWikiLink Packaging_and_labeling.
- Impact_(mechanics) wikiPageWikiLink Pile_driver.
- Impact_(mechanics) wikiPageWikiLink Polyurethane.
- Impact_(mechanics) wikiPageWikiLink Shock_(mechanics).
- Impact_(mechanics) wikiPageWikiLink Shock_and_vibration_data_logger.
- Impact_(mechanics) wikiPageWikiLink Shock_detector.
- Impact_(mechanics) wikiPageWikiLink Space_Shuttle.
- Impact_(mechanics) wikiPageWikiLink Space_Shuttle_Columbia_disaster.
- Impact_(mechanics) wikiPageWikiLink Spall.
- Impact_(mechanics) wikiPageWikiLink Steel.
- Impact_(mechanics) wikiPageWikiLink Tension_(physics).
- Impact_(mechanics) wikiPageWikiLink Time–temperature_superposition.
- Impact_(mechanics) wikiPageWikiLink Traffic_collision.
- Impact_(mechanics) wikiPageWikiLink Velocity.
- Impact_(mechanics) wikiPageWikiLink Write-off.
- Impact_(mechanics) wikiPageWikiLink File:Concussion_Anatomy.png.
- Impact_(mechanics) wikiPageWikiLink File:Impact-test.jpg.
- Impact_(mechanics) wikiPageWikiLink File:Impact_wrench_01.jpg.
- Impact_(mechanics) wikiPageWikiLink File:Kafar_na_Odrze.jpg.
- Impact_(mechanics) wikiPageWikiLink File:Malibucrash.JPG.
- Impact_(mechanics) wikiPageWikiLinkText "Impact (mechanics)".
- Impact_(mechanics) wikiPageWikiLinkText "Impact".
- Impact_(mechanics) wikiPageWikiLinkText "impact force".
- Impact_(mechanics) wikiPageWikiLinkText "impact mechanics".
- Impact_(mechanics) wikiPageWikiLinkText "impact".
- Impact_(mechanics) wikiPageWikiLinkText "impacted".
- Impact_(mechanics) wikiPageWikiLinkText "impacts".
- Impact_(mechanics) wikiPageUsesTemplate Template:Inline_citations.
- Impact_(mechanics) wikiPageUsesTemplate Template:Mechanical_failure_modes.
- Impact_(mechanics) subject Category:Fracture_mechanics.
- Impact_(mechanics) subject Category:Mechanical_failure_modes.
- Impact_(mechanics) hypernym Force.
- Impact_(mechanics) type MilitaryUnit.
- Impact_(mechanics) type Mechanic.
- Impact_(mechanics) comment "In mechanics, an impact is a high force or shock applied over a short time period when two or more bodies collide. Such a force or acceleration usually has a greater effect than a lower force applied over a proportionally longer period.".
- Impact_(mechanics) label "Impact (mechanics)".
- Impact_(mechanics) sameAs Q4115667.
- Impact_(mechanics) sameAs صدم_(خواص_المواد).
- Impact_(mechanics) sameAs Impact_(mécanique).
- Impact_(mechanics) sameAs Trieciena_spēks.
- Impact_(mechanics) sameAs m.073xp7.
- Impact_(mechanics) sameAs Q4115667.
- Impact_(mechanics) sameAs 撞擊.
- Impact_(mechanics) wasDerivedFrom Impact_(mechanics)?oldid=686385805.
- Impact_(mechanics) depiction Concussion_Anatomy.png.
- Impact_(mechanics) isPrimaryTopicOf Impact_(mechanics).