What is relation between energy absorption and damage on compisite under impact?
Best insight from top research papers
The relationship between energy absorption and damage in composite materials under impact is crucial for understanding their performance. Studies show that factors like pre-stressing techniques, stacking sequence, and laminate thickness significantly influence the energy absorption capacity of composites. Pre-stressing, such as applied internal pressure, can induce forces opposing impact, increasing the strain energy required for damage initiation and enhancing energy absorption. Composite structures designed for energy absorption, like Fiber Metal Laminates and impact energy absorbers, demonstrate high energy absorption ratios and structural integrity during damage, ensuring efficient energy dissipation without debris overflow. Additionally, localized interfacial delamination in laminated composites under impact loading affects energy absorption, with higher impact energies leading to increased absorption energy and damage extent.
Answers from top 5 papers
More filters
| Papers (5) | Insight |
|---|---|
87 Citations | The research paper investigates the impact of stacking sequence and laminate thickness on energy absorption and damage evolution in composite laminates, proposing a new methodology for assessing energy absorption capability. |
| The absorption energy of laminated composites increases with damage due to impact loading. Higher impact energy leads to greater absorption energy by the damaged interface compared to undamaged structures. | |
01 Mar 2020 1 Citations | Pre-stressing composite tubes increases energy absorption by inducing forces opposing impact, requiring higher strain energy for damage initiation, as shown in the study on thin tubular energy absorbers. |
| The energy absorber utilizes inward-folded damage on a composite pipe to efficiently absorb energy during impact, ensuring structural integrity without bending or breaking, leading to significant energy absorption. | |
| The study explores the energy absorption and damage mechanism of a UHMWPE-aluminum composite sandwich laminate under impact loading, providing insights into their relationship during impact events. |
Related Questions
The higher absorbed energy, the higher damages in the composite materials ?5 answersAbsorbed energy in composite materials does not necessarily correlate directly with higher damages. While higher absorbed energy indicates better impact resistance, it can lead to various damage mechanisms such as delamination, fiber breakage, fiber splitting, and matrix cracking. The presence of defects like out-of-plane fiber waviness/wrinkling and delamination can compromise the load-carrying capabilities of energy absorbers made from composite materials. Ultrasonic wave-based methods can characterize surface damages in composite materials, showcasing the ability to detect and analyze defects using advanced techniques. Therefore, while higher absorbed energy is desirable for impact resistance, it is crucial to consider the type and extent of damages that may occur in composite materials under different loading conditions.
Why do higher levels of ground shaking produces more damage?4 answersHigher levels of ground shaking produce more damage due to the complex nature of structural responses to seismic events, especially when considering the involvement of local-mode vibrations. The variability in ground motion, as highlighted by Minson et al., shows that even smaller magnitude earthquakes can lead to significant shaking, emphasizing the importance of understanding the impact of various magnitudes on structural integrity. Additionally, the unique characteristics of ground motions induced by underground blasts can result in distinct patterns of structural damage, requiring different assessment methods compared to seismic events. Engineering seismology tools play a crucial role in estimating damage scenarios, emphasizing the need for detailed ground-motion information to assess the potential impact on structures. Therefore, the combination of these factors underscores why higher levels of ground shaking can lead to increased structural damage.
What is the significance of specific energy absorption for vehicle crushworthiness?4 answersSpecific energy absorption is significant for vehicle crushworthiness as it determines the ability of a structure to absorb and dissipate energy during a collision. The specific energy absorption is influenced by various factors such as the diameter of the beam, the size of the unit cell, and the inclusion of nano-aluminum oxide in the crash box. By optimizing these parameters, the design of energy absorbers can be guided to enhance the crushing performance of the structure. The use of energy-absorbing structures, such as thin-walled metallic tubes, in vehicles can effectively convert the kinetic energy of impact into the energy of plastic deformation, thereby reducing the deceleration and ensuring controlled stopping. Additionally, the study of multistage energy absorption systems and occupant self-protective postures further contributes to improving crashworthiness. Overall, understanding and optimizing specific energy absorption is crucial for designing safe and efficient energy-absorbing structures in vehicles.
Is injury risk influenced by shock absorption in soccer?5 answersShock absorption in soccer can influence the risk of injury. Various methods have been developed to enhance shock absorption in soccer equipment. One approach is the use of shock absorption shoes, which utilize rubber outsoles, elastic cushions, and springs to absorb and delay the release of shock vibration energy, effectively reducing the impact force on the lower limbs. Another method involves the use of shock absorption soles, which feature flexible convex bodies that deform to absorb part of the impact force, decreasing the chance of foot injury. Additionally, shock absorption soles with tubular shock absorption elements have been designed to deform easily under pressure, buffering the reverse impact of the ground on the heel and achieving a good shock absorption effect. These innovations in shock absorption technology aim to improve player safety and reduce the risk of injuries in soccer.
Is injury risk influenced by shock absorption in sports?5 answersShock absorption in sports can influence the risk of injury. A study found that foot orthoses that closely fit the contour of the sole can protect against injuries or stress fractures from physical activity. Another study focused on American football helmets and found that introducing liquid as an energy absorbing medium can dramatically reduce the forces of impact, potentially preventing mild traumatic brain injury (mTBI). Additionally, a novel sports shoe with a shock absorption structure was designed to absorb pressure and diminish impact force during sports activities, thereby reducing the risk of injuries. Similarly, another pair of sports shoes with a buffer shock-absorption effect was developed to protect the bones and other parts of the body, decreasing the likelihood of injuries during sports or walking. An improved shock absorption structure for sports shoes was also proposed, which provided evident shock absorption effects and reduced injuries caused by strenuous exercise. Therefore, the presence of shock absorption mechanisms in sports equipment, such as shoes and helmets, can play a role in reducing the risk of injuries.
What are the different materials that can be used to prevent impact?5 answersDifferent materials can be used to prevent impact. Some examples include polymer-based shear-thickening composites, coir/EVA, polypropylene and flax fibre laminate, cellular textile materials, D3O, visco-elastic polymer dough, alumina, steel ball, acrylic resin, ABS resin, ketoaldehyde resin KR-120, lignin fiber, sodium stearate, sodium hexametaphosphate, titanate coupling agent, nano-TiO2, organic bentonite, nano sepiolite powder, talcum powder, triphenyl phosphine, polyphosphoric acid, nano-magnesium hydroxide, flexibilizer, curing agent, defoaming agent, leveling agent, mildew preventive, and pigment.