What is high velocity impact?
What is high velocity impact?
High velocity ballistic impact is highly complex and includes factors such as high pressures, high temperatures, large strains, and high strain rates. Additionally, a wide variety of materials can be involved, all of which interact with one another and are subject to failure and fragmentation.
What is high velocity and low velocity?
High-velocity (HV) exercise is defined as performing a concentric muscle contraction as fast as possible, or in 1 second or less. Low-velocity (LV) exercise is defined as using 2 seconds to complete the contraction.
What is low velocity impact?
Low velocity impact occurs at velocities below 10 m/s and is likely to cause some dents and visible damage on the surface due to matrix cracking and fibre breaking, as well as delamination of the material [14]. Intermediate impact occurs in a velocity range from 10 m/s to 50 m/s.
What is low velocity impact test?
The low-velocity impact tests are carried out by using a drop weight impact testing machine of Instron Dynatup 9250HV followed by ASTM D7136/D7136M-07, which is a standard test method for measuring the damage resistance of a fiber-reinforced polymer matrix composites to a drop-weight impact event.
What is hyper velocity impact crater?
Hypervelocity impact craters are formed by the impact of meteorites that are large and coherent enough to penetrate Earth’s atmosphere with virtually no deceleration, and to strike the ground at near to cosmic velocities (>11 km/s) (Melosh, 1989).
What does high velocity mean?
adjective. operating at high speed. “a high-velocity shell” synonyms: high-speed fast. acting or moving or capable of acting or moving quickly.
What is a high velocity furnace?
High velocity HVAC systems function similarly to traditional HVAC systems. A heat pump or compressor on the outside of your home creates hot and cool air, then sends it into the home through ducts where it’s vented out into the rooms.
What does low velocity mean?
1Characterized by a relatively low speed; specifically (a) (of a gun) firing projectiles with a low muzzle velocity; (b) (Geology) designating a layer of rock through which seismic waves pass slowly, especially an upper layer of the earth’s mantle which is inferred to be partially molten.
What is low velocity impact spatter?
Low Velocity Impact Spatter (LVIS) — A bloodstain pattern that is caused by a low velocity impact/force to a blood source. Misting — Blood which has been reduced to a fine spray, as a result of the energy or force applied to it. Parent Drop — A drop of blood from which a wave, cast-off, or satellite spatter.
What is impact formula?
The impact force can be calculated as. Fmax = 1/2 (2000 kg) (16.7 m/s)2 / (0.5 m) = 558 kN. Note that the gravitation force (weight) acting on the car is only. Fw = m g.
What is the speed of impact?
Impact Velocity Definition An impact velocity is the total speed of an object when it makes an impact with the ground or another object after falling from a certain distance.
What are the effects of high-velocity impact on the surface?
The high-velocity impact generates a high pressure on the impact point because of the deceleration of the impacting fluid. This high pressure may cause surface cracks or deformation. 2. After the collision with the surface, the liquid droplet flows outward in a radial direction, traveling at high speed.
What is the wear mechanism of high-velocity impact?
The wear mechanism seems to be the following: 1. The high-velocity impact generates a high pressure on the impact point because of the deceleration of the impacting fluid. This high pressure may cause surface cracks or deformation. 2.
What is low velocity impact load?
LOW VELOCITY IMP ACT TES T target stiffness, material properties and the projectile mass and stiffness (15). A low velocity impact event can composite laminates. It is an unsafe type of load since it affects the performance of composites.Fo r low velocity drop weights have become standard.
What is the initial velocity of a high-speed projectile?
In high-speed impact applications, damage to the material plays an important role in the evolution of the strength. The totally failed silicon carbide will not sustain any load. The projectile is gold, which is soft compared to the target material. An initial velocity of 4000 m/s is prescribed for the projectile.
