scispace - formally typeset
Search or ask a question

What does time-absorbed energy curve obtained from low velocity impact test refer to? 


Best insight from top research papers

The time-absorbed energy curve obtained from low-velocity impact tests refers to the variation of absorbed energy over time during impact testing. This curve illustrates how the energy absorption characteristics evolve before rupture in composite laminates. Factors such as laminate thickness, impactor velocity, and fibre orientation influence the total absorbed energy during impact tests. The curve provides insights into the energy absorption capabilities of different composite materials and laminates, highlighting the effectiveness of hybrid laminates in absorbing energy before failure compared to traditional materials. Additionally, the curve helps in understanding the impact damage behavior of composite laminates under dynamic loading rates, showcasing the complex failure modes and load-carrying capabilities of these materials.

Answers from top 5 papers

More filters
Papers (5)Insight
The time-absorbed energy curve from low-velocity impact tests in GLARE laminate indicates the maximum energy absorbed before catastrophic failure, aiding in assessing impact resistance and damage tolerance.
The time-absorbed energy curve from low-velocity impact tests indicates the energy absorption ability of carbon-fiber-reinforced composite laminates under impact, as studied in the research.
The time-absorbed energy curve from low velocity impact tests indicates the energy absorption capability of composite energy absorbers under dynamic loading, revealing their performance and failure modes.
The time-absorbed energy curve from low-velocity impact test represents the total energy absorbed by CFRP and Kevlar hybrid laminates during impact, influenced by thickness and impactor velocity variations.
The time-absorbed energy curve from low-velocity impact tests shows how absorbed energy varies over time, indicating the impact resistance and energy absorption characteristics of GFRP and hybrid laminates.

Related Questions

How does low flow velocity in chromatography columns affect the formation of wall effects?5 answersLow flow velocity in chromatography columns can significantly impact the formation of wall effects. Studies have shown that the use of elastic substances to coat the inner walls of chromatographic columns can reduce the wall flow effect, enhancing separation efficiency. Additionally, the installation of cylindrical column inserts at the bottom of the column can increase the critical velocity before the onset of compression, without majorly affecting column hydrodynamics. Computational fluid dynamics modeling has revealed that even at low Reynolds numbers, bends and grooves in column geometries can induce secondary flows that redistribute fluid within the column cross-section, affecting analyte transport. Furthermore, the influence of wall effects on the rise of solid spheres in non-Newtonian fluids has shown changes in terminal rise velocity and trajectory with varying column widths, highlighting the impact of wall effects on flow behavior.
How does low flow velocity in chromatography columns affect the wall effects?5 answersLow flow velocity in chromatography columns can significantly impact wall effects. The use of elastic substances to coat the inner walls of chromatographic columns can reduce the wall flow effect, enhancing separation efficiency. Additionally, novel column geometries with grooves cut into the flat column surface can induce a secondary flow, redistributing fluid within the column even at low flow velocities. Elastic inner wall coatings in fused silica capillaries stabilize the packed bed, increasing column efficiency and lifespan, with an optimal coating thickness around 0.3 μm. Moreover, a low-conversion polymer monolithic column prepared at low temperatures exhibited high permeability and efficiency, attributed to the high porosity resulting from low conversion levels. These findings collectively highlight the diverse strategies and materials used to mitigate wall effects and enhance chromatographic performance under low flow velocity conditions.
What are the results of low velocity impact test?5 answersThe results of low-velocity impact tests on composite laminates varied based on the studies. In one study, the impact energy levels of 10, 15, and 20 J led to reductions of 18.1%, 28.7%, and 33.0% in compressive strength of carbon/epoxy composites. Another study focused on Glass Laminate Aluminium-Reinforced Epoxy (GLARE) laminates found that the laminate could sustain impacts up to 3.13 m/s, with delamination occurring at 3.49 m/s, and the maximum absorbed energy before failure was 14.43 J. Additionally, a comparison between a double-double (DD) laminate and a quadriaxial (Quad) laminate showed equivalent compressive strength and compression after impact (CAI) strength, with differences in impact damage morphology observed.
What is Low-Intensity Pulsed Ultrasound?5 answersLow-intensity pulsed ultrasound (LIPUS) is a non-invasive therapy that has shown promising results in various medical applications. LIPUS has been investigated for its potential in treating COVID-19 pneumonia, tendon injuries, peripheral nerve injuries, and exercise-induced liver inflammation. In COVID-19 pneumonia, LIPUS therapy reduced lung inflammation and serum inflammatory factor levels, suggesting it could be a major advance in COVID-19 pneumonia therapy. In tendon injuries, LIPUS has been found to promote tendon healing by improving cellular structure and blood vessel formation. For peripheral nerve injuries, LIPUS has shown therapeutic effects on nerve regeneration, soft tissue regeneration, and nerve regulation. Additionally, LIPUS has been found to have beneficial effects on Schwann cells and macrophages, suggesting its potential for treating neuropathic inflammation. Finally, LIPUS has been shown to reduce exercise-induced liver inflammation by regulating the IL-13/STAT6/NF-κBp65 pathway. Overall, LIPUS is a promising therapy with potential applications in various medical conditions.
Why does a lower temperature result in a slower reaction rate?5 answersA lower temperature can result in a slower reaction rate due to several factors. In the case of the O(1D) + H2 reaction, both experimental and theoretical results show a weak temperature dependence, with the contribution of the excited state decreasing at lower temperatures. In the plasmon-assisted Huisgen dipolar azide-alkyne cycloaddition reaction, cooling the reaction mixture from room temperature to -35 °C actually increases the reaction efficiency due to plasmon-induced annihilation of the reaction barrier and prolonged plasmon lifetime. In freestanding carbon nanomembranes, the permeation rate of water vapor decreases with warming, while the passage of ammonia molecules increases when the membrane is cooled down to the dew point, highlighting the role of gas-surface interactions. For dolomitization reactions, the rate of dolomite formation exhibits a strong, non-linear temperature dependency, with slower reaction rates observed at temperatures below 200 °C.
How can I analyse the low velocity impact on structure?5 answersTo analyze low velocity impact on structures, finite element analysis can be used. This method allows for the determination of maximum energy absorption and damage modes in different types of sandwich structures. The impact resistance of the structure can be improved by modifying the design, such as changing the wall thickness distribution of the cores or moving the inner panel. Additionally, the type and thickness of the cores and facesheets, as well as interfacial reinforcement techniques, can influence the impact load and energy absorption of the sandwich structure. Delamination is a common type of impact damage in facesheets, and its behavior is dependent on the type of facesheet used. It is also important to consider the role of fluid structure interaction when analyzing low velocity impact on composite materials, especially in marine applications.

See what other people are reading

How coating carbon-based works? xps?
5 answers
Coating carbon-based materials involves various techniques and applications as discussed in the provided contexts. For instance, alcohol-based conductive paints containing graphite, carbon black, graphene, and other materials were developed for electromagnetic interference shielding, offering efficient EMI-shielding performance. Additionally, carbon-based films with excellent friction-reducing and antiwear abilities can be formed in situ from the degradation of poly-α-olefin oil on specific coatings, resulting in low friction coefficients and wear rates. Moreover, carbon-based coatings have been successfully applied in mechanical machining of wood-based materials, enhancing tool durability and wear resistance. These examples highlight the versatility and effectiveness of carbon-based coatings in various industrial applications, showcasing their potential in improving performance and durability. Unfortunately, there is no specific mention of XPS (X-ray photoelectron spectroscopy) in the provided contexts.
What are the primary factors that contribute to the failure of composite sandwich structures in aerospace applications?
5 answers
The primary factors contributing to the failure of composite sandwich structures in aerospace applications include core-facesheet adhesive bonded joint delamination, core damage, facesheet failure, matrix damage, and delamination of the honeycomb core. These failures are often observed under out-of-plane quasi-static compression and out-of-plane impact conditions, leading to reduced load carrying capacity and structural integrity. Additionally, the design and composition of the sandwich structures, such as the type of core material used, play a crucial role in determining their mechanical properties and failure modes. Factors like core stiffness, core shear stress, facing stress, and the presence of an adhesive layer between the cores significantly influence the overall performance and failure characteristics of composite sandwich structures in aerospace applications.
What is correlation method in research?
5 answers
The correlation method in research refers to various techniques used to analyze relationships between variables. It is a statistical procedure that helps researchers understand the interactions and associations among different variables in a dataset. Correlation analysis plays a crucial role in exploring multivariate datasets by providing insights into complex relationships and interactions among variables. This method involves measuring the degree of relationship between quantitative and categorical variables, aiding in a comprehensive understanding of data patterns and dependencies. Correlational research, often treated as descriptive research, describes existing conditions and relationships between variables. By utilizing correlation methods, researchers can uncover valuable insights and patterns within their data, leading to a deeper understanding of the underlying dynamics and connections among variables in a study.
What is the density of epoxy resin?
4 answers
The density of epoxy resin can vary depending on the specific formulation and additives used. Different studies have reported varying densities for epoxy resins. For instance, a high-density epoxy resin blocking material was prepared with a density ranging from 1.21 to 1.43 g/cm³. Another study mentioned the fabrication of NdFeB magnets with epoxy resins, achieving a density of 5.35 g/cm³ for samples with 2% wt epoxy resin. Additionally, a phenolic epoxy polymer bulk was developed with an adjustable density, allowing for customization based on requirements. These examples highlight the flexibility in adjusting the density of epoxy resins to suit different applications and performance needs.
What are the advantages and disadvantages of carbon fiber reinforced polymer sandwich structure?
5 answers
Carbon fiber reinforced polymer (CFRP) sandwich structures offer several advantages and disadvantages. Advantages include high strength-to-weight ratio, excellent mechanical properties, and good energy absorption characteristics. Additionally, CFRP sandwich structures can exhibit high damping values, making them suitable for components in aerial vehicles where noise and vibrations are prevalent. However, these structures may face challenges such as poor interfacial bonding leading to lower strength, especially when flame retardants are added. Moreover, the failure modes of CFRP sandwich structures can include local buckling, compression fracture of the core rib, fiber pull-out, delamination, and core crushing, which can impact their overall performance. Despite these drawbacks, CFRP sandwich structures remain popular due to their lightweight nature and high strength properties.
Can fish bones penetrate colon cancer?
5 answers
Fish bones can indeed penetrate the colon, mimicking symptoms of colon cancer. Ingested fish bones can lead to complications such as perforation of the gastrointestinal tract, with only a small percentage causing issues. These foreign bodies can be challenging to diagnose due to their atypical clinical presentation, often requiring imaging like computed tomography (CT) scans for accurate identification. Surgical intervention is commonly necessary for cases of intestinal perforation by foreign bodies, as highlighted in various cases where laparotomies were performed to address complications like abscesses and perforations. Therefore, while fish bones may not directly cause colon cancer, they can lead to serious complications that may initially mimic or be misdiagnosed as such.
Isolation of gallic acid from plant extract
5 answers
Gallic acid has been successfully isolated from various plant extracts in different studies. For instance, studies on Euphorbia hirta, Putat leaves, Conocarpus erectus, and Butea monosperma have reported the isolation of gallic acid. The isolation process typically involves extraction methods like maceration, column chromatography, and fractionation to obtain pure gallic acid from the plant material. Various techniques such as TLC, HPTLC, HPLC, and FTIR are utilized for characterization and confirmation of the isolated compound. Gallic acid, a phenolic compound, exhibits diverse pharmacological activities and has shown potential as a radioprotective agent, corrosion inhibitor, and cytotoxic agent in different experimental settings.
Which alluminium alloys used for piston manufacture?
5 answers
Aluminum alloys commonly used for piston manufacture include AlSi10Mg, Al-Si base powder metallurgical alloys, and Al alloys with low Ca content. The AlSi10Mg alloy is selected for pistons due to its compatibility with additive manufacturing techniques like Laser Powder Bed Fusion. Powder metallurgical aluminum alloys, such as Al-Si base alloys, exhibit high fatigue strength and wear resistance, surpassing conventional cast piston alloys. Additionally, Al alloys with low Ca content, containing elements like Si, Cu, Fe, Ni, and Mg, are utilized for pistons to reduce Ca content and enhance manufacturing reliability. These alloys undergo specific processes like heating, forging, quenching, and aging to achieve desired properties like antiwear, anticorrosion, strength, and hardness.
Why is suitability of thin ply composites worth investigating for cryogenic application?
5 answers
The suitability of thin-ply composites for cryogenic applications is worth investigating due to their potential to improve performance and reduce structural weight in aerospace components. These composites, when used in cryogenic fuel tanks, can offer lightweight solutions for next-generation launch vehicles. Understanding the mechanical properties of polymers, including thin film polymeric properties at cryogenic temperatures, is crucial for applications in pressure vessels and structural components, where polymers can replace metals and decrease spacecraft mass. Additionally, the use of novel materials like ultra-high molecular weight polyethylene (UHMWPE) composites with nanoadditives has shown promising results in enhancing interlaminar shear strength at both room and cryogenic temperatures, highlighting the importance of investigating thin-ply composites for cryogenic environments.
How does the clinical and economic outcomes of laparoscopic surgery compare to laparotomies in the oncological area?
5 answers
Laparoscopic surgery compared to laparotomies in the oncological area shows comparable oncological outcomes. Studies indicate that laparoscopic procedures offer similar oncological safety and effectiveness as open surgeries for colorectal cancer. Additionally, laparoscopic approaches for right colon cancer have shown improved disease-free survival rates, especially in AJCC stage III patients. Furthermore, laparoscopic resections for rectal cancer have demonstrated equivalent oncological outcomes to open surgeries, with successful surgical techniques being crucial for improved disease-free survival. Economically, laparoscopic surgeries may present challenges in resource-constrained settings like Pakistan due to training and economic constraints. However, the adoption of laparoscopic techniques over time has shown benefits in terms of reduced blood loss, shorter hospital stays, and lower complication rates.
What is recent research on using CNT as a catalyst for plastic recycle?
5 answers
Recent research has focused on utilizing carbon nanotubes (CNTs) as catalysts for plastic recycling. Various studies have explored innovative methods to convert waste plastics into high-value products like CNTs. For instance, one study demonstrated the synthesis of N-doped Fe/Co-encapsulated CNTs from waste plastics, showing comparable oxygen reduction reaction (ORR) performance to commercial Pt/C catalysts. Another research introduced a solar thermal catalytic technology using multi-walled CNTs premodified with polydopamine for upcycling plastic waste into valuable chemicals with lower energy consumption and CO2 emissions. Additionally, the catalytic pyrolysis of post-consumer plastics with bimetallic oxide-based catalysts was investigated to produce CNT composites, showcasing the potential for complex oxide catalysts in generating CNTs from wasted plastic.