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Journal articles on the topic 'Vcact'

Author: Grafiati

Published: 25 July 2024

Last updated: 31 July 2025

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1

van Gemert, Hans. "VCAT Decision." Castlemaine Naturalist 31, no. 335 (2006): 10. http://dx.doi.org/10.5962/p.401122.

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Zhou, Li Ming, Guang Wei Meng, Feng Li, and Hui Wang. "Cell-Based Smoothed Finite Element Method-Virtual Crack Closure Technique for a Piezoelectric Material of Crack." Mathematical Problems in Engineering 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/371083.

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In order to improve the accuracy and efficiency of solving fracture parameters of piezoelectric materials, a piezoelectric element, tailored for the virtual crack closure technique (VCCT), was used to study piezoelectric materials containing a crack. Recently, the cell-based smoothed finite element method (CSFEM) and VCCT have been used to simulate the fracture mechanics of piezoelectric materials. A center cracked piezoelectric materials with different material properties, crack length, mesh, and smoothing subcells at various strain energy release rates are discussed and compared with finite

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Noor, Shazia, Hadeed Ashraf, Muhammad Sultan, and Zahid Mahmood Khan. "Evaporative Cooling Options for Building Air-Conditioning: A Comprehensive Study for Climatic Conditions of Multan (Pakistan)." Energies 13, no. 12 (2020): 3061. http://dx.doi.org/10.3390/en13123061.

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This study provides comprehensive details of evaporative cooling options for building air-conditioning (AC) in Multan (Pakistan). Standalone evaporative cooling and standalone vapor compression AC (VCAC) systems are commonly used in Pakistan. Therefore, seven AC system configurations comprising of direct evaporative cooling (DEC), indirect evaporative cooling (IEC), VCAC, and their possible combinations, are explored for the climatic conditions of Multan. The study aims to explore the optimum AC system configuration for the building AC from the viewpoints of cooling capacity, system performanc

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4

Low, Audrey, Levinia Lim, Linda Lim, et al. "Construct validity of the Visual Cognitive Assessment Test (VCAT)—a cross-cultural language-neutral cognitive screening tool." International Psychogeriatrics 32, no. 1 (2019): 141–49. http://dx.doi.org/10.1017/s1041610219000504.

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ABSTRACTBackground:The Visual Cognitive Assessment Test (VCAT) is a language-neutral cognitive screening tool designed for use in culturally diverse populations without the need for translations or adaptations. While it has been established to be language-neutral, the VCAT’s construct validity has not been investigated.Methods:471 participants were recruited, comprising 233 healthy comparisons, 117 mild cognitive impairment (MCI), and 121 mild Alzheimer’s disease (AD) patients. VCAT and domain-specific neuropsychological tests were administered in the same sitting. Construct validity was asses

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Ng, Li Yun, Chen Joo Chin, Monica Danial, et al. "Validation of the Visual Cognitive Assessment Test (VCAT) for the Early Diagnosis of Cognitive Impairment in Multilingual Population in Malaysia." Psych 4, no. 1 (2022): 38–48. http://dx.doi.org/10.3390/psych4010003.

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As Malaysia undergoes a demographic transformation of population aging, the prevalence of dementia is expected to rise, posing a major public health threat issue. Early screening to detect cognitive impairment is important to implement appropriate clinical interventions. The Visual Cognitive Assessment Test (VCAT) is a language-neutral cognitive assessment screening tool suitable for multilingual populations. This study was aimed to validate the VCAT screening tool for the detection of cognitive impairment amongst the population of Malaysia. A total of 184 participants were recruited, comprisi

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Yozgat, Can Yilmaz, Yanki Celik Yilmazer, and Yilmaz Yozgat. "Pulmonary Atresia with Intact Ventricular Septum associated with Ventriculo-Coronary Arterial Communication in a Fetus at 21 Weeks of Gestation." Case Reports in Obstetrics and Gynecology 2020 (July 15, 2020): 1–3. http://dx.doi.org/10.1155/2020/7581483.

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Pulmonary atresia with the intact ventricular septum (PA-IVS) is a rare anomaly that has an absent communication between the right ventricle and pulmonary arterial circulation. PA-IVS has a hypoplastic and hypokinetic and thickened right ventricle with the intact ventricular septum. It can be diagnosed with PA-IVS in routine obstetric ultrasound examination because the four-chamber view of PA-IVS is generally abnormal. The size of the right ventricular cavity is proportional to the Z value of the diameter of the tricuspid valve. The essential associated cardiac finding of PA-IVS is ventricular

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Yulisa, Arma, Joonyeob Lee, Sang Hyeok Park, and Seokhwan Hwang. "Simultaneous effect of cathode potentials and magnetite concentrations on methanogenesis of acetic acid under different ammonia conditions." Environmental Engineering Research 27, no. 6 (2021): 210317–0. http://dx.doi.org/10.4491/eer.2021.317.

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Electromethanogenesis (EM) is a system that facilitates direct interspecies electron transfer (DIET) in anaerobic digestion (AD) by providing an external power supply to favor desired reactions. Substrates of AD commonly contain ammonia (NH3) as biodegradation product of nitrogen-rich compounds that can deteriorate the stability of AD process. Optimized cathode potential (VCAT) and magnetite (Mag) concentration ([Mag]) are expected to improve AD efficiency in the presence of NH3. Response surface analysis with central composite face-centered design was used in this study to investigate the eff

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8

Liu, Bing, Jie Meng, Zhen Yang, et al. "Exploration of the Relationship of the Voltage Critical Clearing Time and the Voltage Transient Transmission Capacity." Applied Mechanics and Materials 488-489 (January 2014): 905–9. http://dx.doi.org/10.4028/www.scientific.net/amm.488-489.905.

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Both the voltage critical clearing time (VCCT) and the voltage transient transmission capacity (VTTC) are always used to evaluate the stability of the system transient voltage, and their relationships are studied and clarified in the paper. The stability of the transient voltage is mainly depended on the dynamic reactive characteristics of load and the transmission characteristics of voltage and power. Based on the analysis on the dynamic reactive characteristics of load and the transmission characteristics of a power transmission network, the characteristics of the VCCT and the VTTC are studi

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Manke, Sunanda, Kavita Khare, and S. D. Sapre. "VCAT synchroniser-reduction of buffer size in VCAT enabled next generation SDH networks." European Transactions on Telecommunications 22, no. 8 (2011): 500–514. http://dx.doi.org/10.1002/ett.1500.

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10

Krscanski, Sanjin, and Josip Brnic. "Prediction of Fatigue Crack Growth in Metallic Specimens under Constant Amplitude Loading Using Virtual Crack Closure and Forman Model." Metals 10, no. 7 (2020): 977. http://dx.doi.org/10.3390/met10070977.

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This paper considers the applicability of virtual crack closure technique (VCCT) for calculation of stress intensity factor range for crack propagation in standard metal specimen geometries with sharp through thickness cracks. To determine crack propagation rate and fatigue lifetime of a dynamically loaded metallic specimen, in addition to VCCT, standard Forman model was used. Values of stress intensity factor (SIF) ranges ΔK for various crack lengths were calculated by VCCT and used in conjunction with material parameters available from several research papers. VCCT was chosen as a method of

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11

Bernstein, G., D. Caviglia, R. Rabbat, and H. Van Helvoort. "VCAT-LCAS in a clamshell." IEEE Communications Magazine 44, no. 5 (2006): 34–36. http://dx.doi.org/10.1109/mcom.2006.1637944.

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12

Jong, Sun Zek, Norizzati Saedon, Sarah Kiyu, Pey June Tan, and Maw Pin Tan. "46 The Relationship between Cognitive Function and Physical Performance among Older Adults Attending a Falls and Syncope Service in Kuala Lumpur." Age and Ageing 48, Supplement_4 (2019): iv9—iv12. http://dx.doi.org/10.1093/ageing/afz164.46.

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Abstract Introduction Recent studies identified a relationship between gait difficulties and risk of developing dementia, a condition now termed motoric cognitive risk. We interrogated a clinical dataset to determine the relationship between cognitive assessment scores and physical performance scores to identify the strength of association between these two types of measures. Methods Consecutive patients referred to the falls and syncope service and the University of Malaya Medical Centre were recruited. The cognitive function of consenting individuals was assessed using the Montreal Cognitive

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Guzman Barragan, Blanca Lisseth. "Contextos locales de la vigilancia de la calidad del agua para consumo humano en de los países de América Latina: Brasil y Colombia." Revista de Salud Pública 17, no. 6 (2016): 961–72. http://dx.doi.org/10.15446/rsap.v17n6.40977.

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<p>Analizar comparativamente los sistemas nacionales de vigilancia de la calidad del agua para consumo humano (VCACH) de Brasil y Colombia, con el fin de comprender como están organizadas las prácticas en estos países, sus límites y posibilidades.</span></p><p class="MsoNormal" style="margin-bottom: .0001pt; text-align: justify; line-height: 150%;"><strong><span style="font-size: 12.0pt; line-height: 150%;" lang="ES-CO">Métodos:</span></strong><span style="font-size: 12.0pt; line-height: 150%;" lang="ES-CO"> Se utilizó la metodología Cross

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Zhou, Li Ming, Guang Wei Meng, Xiao Lin Li, and Feng Li. "Analysis of Dynamic Fracture Parameters in Functionally Graded Material Plates with Cracks by Graded Finite Element Method and Virtual Crack Closure Technique." Advances in Materials Science and Engineering 2016 (2016): 1–14. http://dx.doi.org/10.1155/2016/8085107.

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Based on the finite element software ABAQUS and graded element method, we developed a dummy node fracture element, wrote the user subroutines UMAT and UEL, and solved the energy release rate component of functionally graded material (FGM) plates with cracks. An interface element tailored for the virtual crack closure technique (VCCT) was applied. Fixed cracks and moving cracks under dynamic loads were simulated. The results were compared to other VCCT-based analyses. With the implementation of a crack speed function within the element, it can be easily expanded to the cases of varying crack ve

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Gurney, Karen, and Eithne Mills. "VCAT, Hanover and the Transgender Conundrum." Alternative Law Journal 32, no. 4 (2007): 203–7. http://dx.doi.org/10.1177/1037969x0703200403.

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16

Jain, Sfoorti. "Credit Pit Detection in Subordinate Securities: A French Perspective." Ushus - Journal of Business Management 18, no. 3 (2019): 65–85. http://dx.doi.org/10.12725/ujbm.48.6.

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The purpose of this research is to prepare a predictive model for identifying credit crisis using an artificial neural network. The paper also aims to find out the driver and driven relationship between various financial instruments like CDS, FRA, IRS, and the Volatility index (VCAC) and government securities for France. The model, thus, is directed towards finding a threshold for credit pit events and linking various events corresponding to that dates where the threshold is breached to validate the accuracy and usefulness of the model. From the research, it is found that for France, the CDS-F

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Zhou, Hong Liang. "Implementation of Crack Problem of Functionally Graded Materials with ABAQUS^TM." Advanced Materials Research 284-286 (July 2011): 297–300. http://dx.doi.org/10.4028/www.scientific.net/amr.284-286.297.

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An implementation method of the virtual crack closure technique (VCCT) for fracture problems of non-homogeneous materials such as functionally graded materials (FGMs) with commercial finite element software ABAQUSTMis introduced in this paper. In order to avoid the complex post proceeding to extract fracture parameters, the interface crack element based on the VCCT is developed. The heterogeneity of FGMs is characterized though user subroutine UMAT and the interface crack element is implemented by user subroutine UEL. Several examples are analyzed to demonstrate the accuracy of the present met

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Chuang, Yung-Cheng, Cong-Sheng Su, and Yu-Jui Liang. "Influence of Failure-Load Prediction in Composite Single-Lap Joints with Brittle and Ductile Adhesives Using Different Progressive-Damage Techniques." Polymers 16, no. 7 (2024): 964. http://dx.doi.org/10.3390/polym16070964.

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The usage of adhesively bonded joints, such as single-lap and double-lap joints, is increasing rapidly in aerospace composite structures as a popular alternative to bolts and rivets. Compared to the conventional joining methods such as fastening and riveting, adhesive-bonding technology better prevents damage to composite structures due to the smooth configuration and the mitigation of stress concentration around holes. In this work, the built-in progressive-damage-modeling techniques in Abaqus, including the cohesive zone model (CZM) and the virtual crack closure technique (VCCT), are used to

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YOKOTA, Hideo, Masaomi NISHIMURA, Sakiko NAKAMURA, Kazuaki FUKASAKU, Akitake MAKINOUCHI, and Ryutaro HIMENO. "1202 Individual modeling using a VCAT system." Proceedings of the JSME annual meeting 2005.5 (2005): 145–46. http://dx.doi.org/10.1299/jsmemecjo.2005.5.0_145.

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Xi, Liang, Xiu Li Zhao, Chong Wei Shang, Guang Ming Kong, and Xu Liu. "Fatigue Crack Propagation Life Prediction of 2A12 Aluminum Alloy Based on VCCT." Advanced Materials Research 1081 (December 2014): 196–99. http://dx.doi.org/10.4028/www.scientific.net/amr.1081.196.

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The fatigue crack propagation behavior of the prior corrosion 2A12 aluminum alloy fastener involving a central hole was investigated. The virtual crack closure technique (VCCT), is straightforward and not sensitive to the FEA mesh size, was carried out to calculate strain energy release rate and SIFs of AA 2A12 under different stress levels and corrosion years. Based on the VCCT, the simulation carried out to analyze the corrosion fatigue crack growth behavior. It was proved to be convenient to simulate the crack propagation life and the predicted crack growth curve was in good agreement with

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Goyal, Ravi, Rupinder Kaur Sodhi, and Anuj Gupta. "DEVELOPMENT AND VALIDATION OF A NOVEL METHOD FOR CAUSALITY ASSESSMENT USING SUSPECTED ADVERSE DRUG REACTIONS TO ANGIOTENSIN-CONVERTING ENZYME INHIBITORS." Asian Journal of Pharmaceutical and Clinical Research 11, no. 11 (2018): 307. http://dx.doi.org/10.22159/ajpcr.2018.v11i11.27749.

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Objectives: The study has been designed to develop, test reliability, and construct validity of a novel versatile causality assessment tool (VCAT) method.Methods: The study included 427 literature case reports of angiotensin-converting enzyme inhibitors with suspected adverse drug reactions from 1990 to February 25, 2016. The causality of these cases was assessed independently by 3 raters in 3 phases of the study. Kappa (k) and intra-class correlation Intraclass Correlation Coefficient (ICC) were used to test reliability and validity of the VCAT method.Results: Intra-rater reliability was high

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van Gemert, Hans. "Report on VCAT Hearing 15-16 May 2006." Castlemaine Naturalist 31, no. 333 (2006): 4. http://dx.doi.org/10.5962/p.401106.

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Zhong, Zhi Peng, Shui Wan, and Lin Yun Zhou. "A new Interface Element Method on Computation of the Interface Crack Propagation Energy Release Rate." Applied Mechanics and Materials 204-208 (October 2012): 4573–77. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.4573.

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A new interface element method was proposed to calculate the strain energy release rates(SERR) based on the virtual crack closure technique (VCCT). A Lagrange multiplier was introduced between the node pair at crack tip to obtain the internal forces. Then from the VCCT, the SERR was solved by using the forces and displacements near the crack tip. Examples for stationary cracks under the two typical cases are given. Meanwhile, the relationship curves between crack energy release rate and the length of crack, plate depths were plotted respectively.The example shows that the interface element use

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Kulathumani, V., R. A. Moparthi, and Y. P. Fallah. "VCAST: Scalable Dissemination of Vehicular Information with Distance-Sensitive Precision." International Journal of Distributed Sensor Networks 9, no. 11 (2013): 586193. http://dx.doi.org/10.1155/2013/586193.

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25

García-Dussán, Éder Alexánder. "Sobre la víctima del conflicto armado en el cine colombiano reciente." Cuadernos de Música, Artes Visuales y Artes Escénicas 20, no. 1 (2025): 34–49. https://doi.org/10.11144/javeriana.mavae20-1.vcac.

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El propósito de este artículo es analizar las maneras formales y funcionales en las que se relata el actor social llamado víctima del conflicto armado colombiano y sus posibles testimonios en algunos de los largometrajes transnacionales de ficción colombianos de los últimos tres lustros. Para dar cuenta de esto, se acude a la compresión del cine como un archivo histórico que admite ser interpretado desde herramientas propias del análisis discursivo y los regímenes de audiovisualidad. Los resultados muestran la aparición de un nuevo cine, aquí llamado el cine-stésico, caracterizado por revelar

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Gliszczynski, A., S. Samborski, N. Wiacek, and J. Rzeczkowski. "Mode I Interlaminar Fracture of Glass/Epoxy Unidirectional Laminates. Part II: Numerical Analysis." Materials 12, no. 10 (2019): 1604. http://dx.doi.org/10.3390/ma12101604.

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The paper deals with numerical analysis of double cantilever beam (DCB) predefined to Mode I Interlaminar Fracture Tests of GRFP unidirectional laminates. The numerical analyses were performed in the ANSYS® program based on the finite element. In geometrically nonlinear analysis, two algorithms, responsible for initiation and propagation of delamination front, were applied: Virtual Crack Closure Technique (VCCT) and Cohesive zone method (CZM). Due to the unidirectional arrangement of layers of the laminate, the problem of DCB test was solved with the use of one- and three-dimensional models wi

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Polyzos, Efstratios, Danny Van Hemelrijck, and Lincy Pyl. "Contact Force and Friction of Generally Layered Laminates with Residual Hygrothermal Stresses under Mode II In-Plane-Shear Delamination." Applied Sciences 14, no. 16 (2024): 7045. http://dx.doi.org/10.3390/app14167045.

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Mode II (in-plane-shear) delamination tests are more complex than mode I (opening) due to the presence of a contact force between the two arms. This force is essential for the calculation of the energy release rate (ERR) and is closely linked to friction effects. A novel formulation is presented in this article to estimate the contact force analytically. Specifically, the contact force is derived within the context of the rigid, semi-rigid, and flexible joint models. The analytical solutions consider the case of a generally layered composite laminate with residual hygrothermal stresses and are

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Volkov, V. V., I. L. Simakova, and I. A. Tikhonovskaya. "Evaluation of the New Compression-Perimeter Test Effectiveness in the Early Diagnosis of Glaucoma." Ophthalmology in Russia 17, no. 2 (2020): 229–37. http://dx.doi.org/10.18008/1816-5095-2020-2-229-237.

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Purpose: To evaluate the effectiveness of a new modification of the vacuum-perimeter test (VPT) by V.V. Volkov in the early diagnosis of glaucoma in comparison with the results of the original test and its known modification — vacuum-compression automated test (VCAT) in an open comparative clinical research. Patients and Methods. The study involved 26 patients (47 eyes) (average age 52.9 ± 8.5 years) with suspected open-angle glaucoma (OAG). Patients were divided into three groups: 1-st — 19 eyes with preglaucoma, 2-nd — 18 eyes with the early stage of OAG, 3-rd — 10 eyes of five patients with

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Hasani Najafabadi, S. H., Stefano Zucca, D. S. Paolino, G. Chiandussi, and Massimo Rossetto. "Numerical Computation of Stress Intensity Factors in Ultrasonic Very-High-Cycle Fatigue Tests." Key Engineering Materials 754 (September 2017): 218–21. http://dx.doi.org/10.4028/www.scientific.net/kem.754.218.

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The correct computation of the Stress Intensity Factor (SIF) in ultrasonic Very-High-Cycle Fatigue (VHCF) loading conditions is a key issue when investigating the crack growth rate curve with pre-cracked specimens or when evaluating critical SIF values from fracture surfaces of failed specimens. Dynamic conditions related to the resonance of the vibrating specimen, contact nonlinearity between crack faces and stress singularity at the crack tip make the SIF computation difficult and cumbersome. Generally, numerical computation through Finite Element Models (FEMs) under non-linear dynamic condi

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Wu, Mengjie, Yuyan Zhang, Xin Dai, and Ling Jiang. "Studies on the Mechanical Models and Behaviors for the Stamp/Film Interface in Microtransfer Printing." Materials 15, no. 17 (2022): 5915. http://dx.doi.org/10.3390/ma15175915.

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The adhesion/delamination characteristics at the stamp/film interface are critical for the efficiency of film microtransfer printing technology. To predict and regulate the interface mechanical behaviors, finite element models based on the J-integral, Virtual Crack Closure Technology (VCCT), and the cohesive zone method (CZM) were established and compared. Then, the effects of pulling speed and interface parameters on the pull-off force, which is used to characterize the interface adhesion strength, were investigated. Comparisons between the simulation results and previous experimental results

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Cibulka, Radek, Lenka Baxová, Hana Dvořáková, et al. "Catalytic effect of alloxazinium and isoalloxazinium salts on oxidation of sulfides with hydrogen peroxide in micellar media." Collection of Czechoslovak Chemical Communications 74, no. 6 (2009): 973–93. http://dx.doi.org/10.1135/cccc2009030.

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Three novel amphiphilic alloxazinium salts were prepared: 3-dodecyl-5-ethyl-7,8,10-trimethylisoalloxazinium perchlorate (1c), 1-dodecyl-5-ethyl-3-methylalloxazinium perchlorate (2b), and 3-dodecyl-5-ethyl-1-methylalloxazinium perchlorate (2c). Their catalytic activity in thioanisole (3) oxidation with hydrogen peroxide was investigated in micelles of sodium dodecylsulfate (SDS), hexadecyltrimethylammonium nitrate (CTANO3) and Brij 35. Reaction rates were strongly dependent on the catalyst structure, on the type of micelles, and on pH value. Alloxazinium salts 2 were more effective catalysts th

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Miravete, Antonio, and Miguel A. Jime´nez. "Application of the finite element method to prediction of onset of delamination growth." Applied Mechanics Reviews 55, no. 2 (2002): 89–106. http://dx.doi.org/10.1115/1.1450763.

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The present article is concerned with the application of the finite element method to the analysis of the onset of delamination growth in composites by means of the virtual crack closure technique (VCCT). The article reviews first the application of linear elastic fracture mechanics (LEFM) to the analysis of delamination, as well as the reasons why the VCC technique is the standard method of combining LEFM and the finite element method to predict onset of delamination growth. The article also reviews the different solutions proposed in the literature to deal with the oscillatory singularity as

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Bacarreza, Omar, and M. H. Aliabadi. "A Novel Methodology for Fatigue Delamination Growth Analysis of Composites." Key Engineering Materials 488-489 (September 2011): 763–66. http://dx.doi.org/10.4028/www.scientific.net/kem.488-489.763.

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A novel methodology for analysis of fatigue delamination growth, capable of dealing with complex delamination shapes and mixed-modes in a computationally efficient way, is proposed. It combines the VCCT to find the energy release rates and the XFEM to update the geometry during the progressive failure, thus making it very robust and computationally efficient. The methodology is demonstrated at coupon level.

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Pirondi, A., G. Giuliese, and F. Moroni. "Development of a cohesive zone model for three-dimensional simulation of joint de-bonding/delamination under mixed-mode I/II fatigue loading." International Journal of Structural Integrity 5, no. 3 (2014): 171–86. http://dx.doi.org/10.1108/ijsi-02-2014-0008.

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Purpose – In this work, the cohesive zone model (CZM) developed by some of the authors to simulate the propagation of fatigue defects in two dimensions is extended in order to simulate the propagation of defects in 3D. The paper aims to discuss this issue. Design/methodology/approach – The procedure has been implemented in the finite element (FE) solver (Abaqus) by programming the appropriate software-embedded subroutines. Part of the procedure is devoted to the calculation of the rate of energy release per unit, G, necessary to know the growth of the defect. Findings – The model was tested on

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Hao, Rui, Zongyi Wen, Haohui Xin, and Weiwei Lin. "Fatigue Life Prediction of Notched Details Using SWT Model and LEFM-Based Approach." Materials 16, no. 5 (2023): 1942. http://dx.doi.org/10.3390/ma16051942.

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The fatigue crack initiation life of unwelded steel components accounts for the majority of the total fatigue life, and the accurate prediction of it is of vital importance. In this study, a numerical model utilizing the extended finite element method (XFEM) and Smith–Watson–Topper (SWT) model is established to predict the fatigue crack initiation life of notched details extensively used in orthotropic steel deck bridges. Using the user subroutine UDMGINI in Abaqus, a new algorithm was proposed to calculate the damage parameter of SWT under high-cycle fatigue loads. The virtual crack-closure t

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Rzeczkowski, Jakub, and Sylwester Samborski. "Experimental and Numerical Research of Delamination Process in CFRP Laminates with Bending-Twisting Elastic Couplings." Materials 15, no. 21 (2022): 7745. http://dx.doi.org/10.3390/ma15217745.

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This paper aims at experimental and numerical research of delamination process in carbon/epoxy composite laminates with different fiber orientation angles in stacking sequence exhibiting the bending–twisting elastic couplings. Experimental specimens were subjected to the double cantilever beam (DCB) tests according to the ASTM D5528 regulations. Values of the mode I strain energy release rates were calculated by using three different data reduction schemes: the modified beam theory, the compliance calibration method and the modified compliance calibration. Determination of delamination initiat

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Chithiramohan, Tamara, Smrithi Santhosh, Grace Threlfall, et al. "Culture-Fair Cognitive Screening Tools for Assessment of Cognitive Impairment: A Systematic Review." Journal of Alzheimer's Disease Reports 8, no. 1 (2024): 289–306. http://dx.doi.org/10.3233/adr-230194.

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Background: Cognitive screening tools are important in the detection of dementia, including Alzheimer’s disease; however, they may contain cultural biases. Objective: This review examines culture-fair cognitive screening tools and evaluates their screening accuracy, strengths, and limitations. Methods: Medline, Embase, PsychINFO and CINAHL were searched. The protocol was registered on PROSPERO (CRD42021288776). Included studies used a culture-fair tool to assess cognition in older adults from varying ethnicities. Narrative synthesis was conducted. Results: 28 studies were included assessing el

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Kim, T. W., H. Y. Jeong, J. H. Choe, and Y. H. Kim. "Prediction of the Fatigue Life of Tires Using CED and VCCT." Key Engineering Materials 297-300 (November 2005): 102–7. http://dx.doi.org/10.4028/www.scientific.net/kem.297-300.102.

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A new simulation methodology using the finite element method (FEM) was proposed to predict the fatigue life of tires. In the FEM simulation the cracking energy density (CED) was calculated, and the virtual crack closure technique (VCCT) was used to calculate the strain energy release rate (SERR) for a crack. First, a plane in an element on which CED had its maximum was determined, and a crack was created on the plane. Once a crack was introduced, another plane on which CED had its maximum was again determined, and the crack was further elongated along the plane. In addition, SERR was calculate

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Schmidt, Jakob, Marcus Klingenhöfer, Jörg Kaufmann, Holger Cebulla, and Lothar Kroll. "Characterization of the interlaminar fracture toughness of unidirectional thermoplastic composites." Technologies for Lightweight Structures (TLS) 5, no. 1 (2022): 77–85. http://dx.doi.org/10.21935/tls.v5i1.157.

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In this study, the critical energy release rate in mode I (G1c) for thermoplastic composites made of carbon fiber (CF) and glass fiber (GF) with a polyamide 6 (PA6) matrix is investigated. Double cantilever beam (DCB) was used as the specimen for the mode I test, and the ASTM D 5528-13 was chosen as standard. Moreover, different methodological approaches were applied by comparing different data reduction schemes from the ASTM D 5528-13 and further analytic approaches from the literature. In addition to the conducted experiments, a numerical model of the DCB test is developed and the virtual cr

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Katajisto, Harri, Petri Kere, and Mikko Lyly. "A model for fast delamination analysis of laminated composite structures." Rakenteiden Mekaniikka 53, no. 2 (2020): 67–84. http://dx.doi.org/10.23998/rm.82730.

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Delamination is one of the major failure mechanisms for composites and traditionally the simulation requires high expertise in fracture mechanics and dedicated knowledge of the Finite Element Analysis (FEA) tool. Yet, the simulation cycle times are high. Geometrically nonlinear analysis approach, which is based on the Reissner-Mindlin-Von K´arm´an type shell facet model, has been implemented into the Elmer FE solver. Altair ESAComp software runs the Elmer Solver in the background. A post-processing capability, which enables the prediction of the delamination onset from the FEA output, has been

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Vishwanath, K. S. "Computational Investigation of Square Embedded Delamination of a Composite Laminate using VCCT." International Journal for Research in Applied Science and Engineering Technology 9, no. VI (2021): 381–84. http://dx.doi.org/10.22214/ijraset.2021.34923.

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The fiber reinforced polymer laminates are widely implemented in aviation industry due to its advantages and applications other materials in terms of strength to weight ratio, dsign features and many more. The strength of the interface compared to longitudinal and lateral directions of the plies are comparatively less and give rise too poor transverse direction strength. Hence a failure mechanism called delamination will occur in case when tools are dropped or due to poor manufacturing which would give rise to interface delamination. In this paper, VCCT is employed at the interface between bas

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Yao, Anlin, Wenbo He, Taolong Xu, Hongye Jiang, and Dongfang Gu. "3D-VCCT based fracture analysis method for gas pipelines with multiple cracks." Natural Gas Industry B 6, no. 5 (2019): 488–96. http://dx.doi.org/10.1016/j.ngib.2019.03.005.

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Karmakov, S., F. Cepero-Mejías, and J. L. Curiel-Sosa. "Numerical analysis of the delamination in CFRP laminates: VCCT and XFEM assessment." Composites Part C: Open Access 2 (October 2020): 100014. http://dx.doi.org/10.1016/j.jcomc.2020.100014.

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Wang, Qing Yuan, Yong Jie Liu, Xiang Guo Zeng, and Hua Yan Chen. "Study on Calculation Method of Fracture Parameters of the Tubular Based on 3D VCCT." Key Engineering Materials 385-387 (July 2008): 713–16. http://dx.doi.org/10.4028/www.scientific.net/kem.385-387.713.

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The stress intensity factor (SIF) for tubular specimens were calculated based on virtual crack closure technique （VCCT）. The effects of geomet rical factors (inner radius, wall thickness and relative crack length) and external loads on the SIF were analyzed, respectively, by use of the single-variable approach. Finally, an approximate formula for SIF of compact-tensile tubular specimens was obtained as all factors mentioned were considered, which was presented as a reference for the tubular engineering design.

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Tawfik, Ahmed Bahgat, Sameh Youssef Mahfouz, and Salah El-Din Fahmy Taher. "Nonlinear ABAQUS Simulations for Notched Concrete Beams." Materials 14, no. 23 (2021): 7349. http://dx.doi.org/10.3390/ma14237349.

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The numerical simulation of concrete fracture is difficult because of the brittle, inelastic-nonlinear nature of concrete. In this study, notched plain and reinforced concrete beams were investigated numerically to study their flexural response using different crack simulation techniques in ABAQUS. The flexural response was expressed by hardening and softening regime, flexural capacity, failure ductility, damage initiation and propagation, fracture energy, crack path, and crack mouth opening displacement. The employed techniques were the contour integral technique (CIT), the extended finite el

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Raso, Vagner, and Júlia Maria D'Andrea Greve. "Exercício aeróbico ou com pesos melhora o desempenho nas atividades da vida diária de mulheres idosas." Revista Brasileira de Medicina do Esporte 18, no. 2 (2012): 87–90. http://dx.doi.org/10.1590/s1517-86922012000200004.

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Este estudo aleatorizado não controlado teve como objetivo determinar o efeito de um protocolo de exercício com pesos ou aeróbico no desempenho das atividades da vida diária em mulheres idosas. Para tanto, a amostra foi constituída por 41 mulheres idosas aparentemente saudáveis na faixa etária de 60 a 85 anos de idade (x: 65,1 ± 7,9 anos) divididas aleatoriamente em grupo exercício com pesos (n: 22) ou aeróbico (n: 19). O grupo exercício com pesos consistiu na execução de três séries de oito a 12 repetições a 60% de uma repetição máxima no exercício leg press 45º. O grupo exercício aeróbico co

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Jahanshahi, M., J. Rowe, T. Saleem, et al. "Striatal Contribution to Cognition: Working Memory and Executive Function in Parkinson's Disease before and after Unilateral Posteroventral Pallidotomy." Journal of Cognitive Neuroscience 14, no. 2 (2002): 298–310. http://dx.doi.org/10.1162/089892902317236911.

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The basal ganglia are intimately connected to the frontal cortex via five fronto-striatal circuits. While the role of the frontal cortex in cognition has been extensively studied, the contribution of the basal ganglia to cognition has remained less clear. In Parkinson's disease, posteroventral pallidotomy (PVP) involves surgical lesioning of the internal section of the globus pallidus (GPi, the final output pathway from the basal ganglia) to relieve the motor symptoms of the disorder. PVP in Parkinson's disease provides a unique opportunity to investigate the impact of disruption of striatal o

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Vishwanath, K. S. "Computational Investigation of through the Width Delamination of a Composite Laminate using VCCT." International Journal for Research in Applied Science and Engineering Technology 9, no. VI (2021): 128–31. http://dx.doi.org/10.22214/ijraset.2021.34890.

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The fiber reinforced polymer laminates have found extensive applications because of its advantages over other materials in terms of strength, stiffness, stability, weight saving features, resistance to corrosion and erosion and many more. But due to poor transverse direction strength, a failure mechanism called delamination will occur in case of poor manufacturing or when tools are dropped which would make an impact. In this paper, VCCT is implemented at the interface between base and sub laminate to investigate for 20mm through the width buckling driven delamination growth. The computational

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Chen, Zhiying, Yanwei Dai, and Yinghua Liu. "Structural fatigue crack propagation simulation and life prediction based on improved XFEM-VCCT." Engineering Fracture Mechanics 310 (November 2024): 110519. http://dx.doi.org/10.1016/j.engfracmech.2024.110519.

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Zhang, Angeline, Pryseley Assam, Dianne Bautista, Audrey Low, Simon Kang Seng Ting, and Nagaendran Kandiah. "P3-249: VISUAL COGNITIVE ASSESSMENT TOOL (VCAT): A SCREENING TOOL FOR MULTILINGUAL SOCIETIES." Alzheimer's & Dementia 10 (July 2014): P722—P723. http://dx.doi.org/10.1016/j.jalz.2014.05.1340.

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