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Academic literature on the topic 'Fracture load'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Fracture load"

1

Rana, Muhammad H., Sharaz Shaik, Mohammad S. Hameed, Samar Al-Saleh, Eman M. AlHamdan, Abdullah Alshahrani, Abdulaziz Alqahtani, Ahmed Heji Albaqawi, Fahim Vohra, and Tariq Abduljabbar. "Influence of Dental Glass Fibers and Orthopedic Mesh on the Failure Loads of Polymethyl Methacrylate Denture Base Resin." Polymers 13, no. 16 (August 20, 2021): 2793. http://dx.doi.org/10.3390/polym13162793.

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The aim of the present study was to evaluate the fracture loads of polymethyl methacrylate (PMMA) complete denture bases reinforced with glass-fiber mesh and orthopedic casting tape (OCT) in comparison to conventional PMMA dentures under artificial aging. Dental fiberglass framework (Group 1) and OCT (Group 2 and 3) reinforced PMMA acrylic dentures were fabricated on the edentulous ridge. Ten PMMA dentures without reinforcement (Group 4) were included as controls. All specimens were placed in a chewing simulator chamber, and fatigue load was applied. To assess the fracture loads, static loads with a universal testing machine were applied. Fractured specimens in each group were evaluated under a scanning electron microscope. The data were statistically analyzed employing analysis of variance and Tukey post-hoc test. The association of denture weight and thickness on fracture load was assessed using Pearson and Spearman correlations. Dental fiberglass (Group 1) displayed the highest fracture load (692.33 ± 751.41 N), and Group 4 (control) exhibited the lowest fracture loads (281.41 ± 302.51 N). Dentures reinforced with fiberglass mesh framework exhibited intact fractures. In contrast, Group 2 and 3 specimens using OCT demonstrated ditching fractures. It was observed that the thickness and weight of all the reinforced specimens influenced the load required to fracture the dentures (p < 0.001). Denture specimens strengthened with OCT (Groups 2 and 3) exhibited failure loads lower than dental fiberglass (Group 1) specimens but higher than unreinforced controls.

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Van der Kolk - Bender, Celine A., Maarten J. Koudstaal, and Eppo B. Wolvius. "Treatment of Severely Atrophic Edentulous Mandible Fractures: Load-Bearing or Load-Sharing?" Craniomaxillofacial Trauma & Reconstruction Open 2, no. 1 (January 2018): s—0038–1667295. http://dx.doi.org/10.1055/s-0038-1667295.

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Several nonsurgical and surgical techniques have been employed to treat fractures of the severely atrophic mandible. The aim of this study was to analyze the repair outcome of these fractures. From 2010 to 2016, patients with fractures of the severely atrophic mandible were included. All files were retrospectively studied. Twelve patients (mean age: 76 years; female, n = 8) with a single ( n = 6) or multiple fracture(s) of the atrophic edentulous mandible (mean height was 10.1 mm) were identified. Fracture occurred following trauma ( n = 9), explantation of dental implants ( n = 2), and placing an overdenture bar ( n = 1). In seven cases, consolidation was successful following open reduction and internal fixation (ORIF) using a load-bearing reconstruction plate. In five cases, the initial treatment was different: conservative treatment, using gunning splint, and performing ORIF using miniplates. In all five cases, additional ORIF using a load-bearing reconstruction plate was needed. In four cases, short dental implants were placed several months following fracture repair. In case of a severely atrophic mandibular fracture, the authors advise ORIF with a load-bearing reconstruction plate. In selected cases, secondary oral rehabilitation with short dental implants and implant-supported prosthesis is feasible.

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Almas, Khalid, Esam Tashkandi, Philippe Aramouni, Elie Zebouni, and Salam Dib. "Fracture Resistance and Failure Location of Zirconium and Metallic Implant Abutments." Journal of Contemporary Dental Practice 9, no. 7 (2008): 41–48. http://dx.doi.org/10.5005/jcdp-9-7-41.

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Abstract Aim The purpose of this study was to evaluate the fracture resistance and failure location of single-tooth, implant-supported, all-ceramic restorations on different implant abutments subjected to a maximum load. Methods and Materials Forty Certain 3i implants and 20 ITI Straumann implants were used in this study in combination with 20 UCLA abutments, 20 ZiReal abutments, and 20 synOcta Ceramic Blanks to form three groups according to abutment type. All 60 abutments were prepared with standard measurements: a 1.0 mm deep chamfer, 2.0 mm of incisal reduction, and a total height of 7 mm. Sixty IPS Empress 2 full ceramic crowns were fabricated and cemented on each abutment with a resin cement. Static loading was simulated under maximum loading and fracture locations were noted. Results The mean load to failure data and standard deviations for the three groups were as follows: Group 1 (792.7 N ± 122.5) and Group 3 (793.6 ± 162.3) showed no significant difference in fracture resistance while the values for specimens in Group 2 (604 N ± 191.1) had the lowest mean value and were significantly lower. In Group 1, 16 crowns and four abutment fractures were reported, while in Group 3, 17 crowns and three abutments fractured. Group 2 actually showed three types of fractures. Two specimen fractures were located at the implant level, six with fractures occuring within the Empress 2 all-ceramic crown, and the remaining 12 failures were located at the abutment level. Conclusion Within the limitations of this laboratory study, the following conclusions were drawn: The mean load-to-failure values for all three groups were well above the reported normal maximal incisal load range. The load to failure for both the zirconium oxide (ZrO2) abutments (ZiReal on 3i Certain implants and synOcta Ceramic Blanks on SLA ITI Straumann implants) had mean fracture loads of 792.7 N (+122.6) and 604.2 N (+191.2), respectively. The zirconium oxide (ZrO2) ZiReal and titanium (UCLA) abutments on the 3i Certain implants had statistically significantly higher fracture loads (792.7 N and 703.7 N, respectively) than those recorded for the 3i Ceramic Blank abutments on the SLA ITI Straumann implant (604.2 N). The ITI Straumann Ceramic Blank abutments showed uniform fracture behavior. Fracture mainly emanated from the cervical buccal aspect of the abutment. Clinical Significance The three abutments tested showed they can withstand clinical loads above the normal range of mastication. Citation Aramouni P, Zebouni E, Tashkandi E, Dib S, Salameh Z, Almas K. Fracture Resistance and Failure Location of Zirconium and Metallic Implant Abutments. J Contemp Dent Pract 2008 November; (9)7:041-048.

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Kamgue Lenwoue, Arnaud, Jingen Deng, Yongcun Feng, Haitao Li, Adefarati Oloruntoba, Naomie Songwe Selabi, Micheal Marembo, and Yuanxiu Sun. "Numerical Investigation of the Influence of the Drill String Vibration Cyclic Loads on the Development of the Wellbore Natural Fracture." Energies 14, no. 7 (April 6, 2021): 2015. http://dx.doi.org/10.3390/en14072015.

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Wellbore instability is one of the most serious issues faced in the drilling process. During drilling operations, the cyclic loads applied on the fractured formation progressively modify the initial parameters (i.e., length and width) of the fractured formation, thus resulting into undesirable wellbore instability. In this paper, using a nonlinear finite element software (ABAQUS) as the numerical simulator, a poro-elasto-plastic model has been established which aimed at analyzing the influence of drill string vibration cyclic loads on the development of the wellbore natural fracture. The numerical results showed that the fracture width as a function of time profiles followed a sinusoidal behavior similar to the drill string vibration cyclic load profiles. For different cyclic load magnitudes with constant number of cyclic loads, the highest percentage increase of the fracture width after integration of cyclic loads was 64.77%. Interestingly, the fracture width increased with the fracture length in the near wellbore region while it globally decreased in the region far away from the wellbore. But for constant cyclic load magnitude with different number of cyclic loads, the biggest percentage increase of the fracture width after integration of cyclic loads was slightly lower representing 63.12% while the oscillating period of the fracture width increased with the number of cyclic loads. The parametric study revealed that the drill string vibration cyclic loads were relatively independent of the fracture length and the bottom hole pressure. However, the fracture width and the loss circulation rates were considerably impacted by the drill string vibration and the highest percentage increase of the loss circulation rate after integration of cyclic loads was 14.3%. This study provides an insight into the coupling of the fracture rock development and the continuous cyclic loads generated by drill string vibrations which is an aspect that has been rarely discussed in the literature.

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Gaintantzopoulou, Maria D., Eleftherios T. Farmakis, and George C. Eliades. "Effect of Load Cycling on the Fracture Strength/Mode of Teeth Restored with FRC Posts or a FRC Liner and a Resin Composite." BioMed Research International 2018 (August 14, 2018): 1–10. http://dx.doi.org/10.1155/2018/9054301.

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The aim of the study was to comparatively evaluate the fracture strength and mode of root canal treated teeth restored with resin composites with and without posts. The lingual cusps of root canal treated first upper premolars (n = 10/group) were removed down to cervical enamel and restored with the following: group A: glass-fiber post (Glassix) followed by a particulate-filled composite resin (PFC, G-aenial posterior, 3 × 2 mm layers); group B: glass-fiber reinforced composite bulk fill liner (EverX posterior, 4 mm layer) with the PFC (2 mm layer). Specimens were immersed in H2O (1 w/37°C), then subjected to load cycling (50 N/0.2 Hz/200k cycles), and fractured under compressive loading. Failure mode was characterized by stereomicroscopy. Statistical analysis was performed by Mann-Whitney (load) and Chi-square (mode) at a = 0.05. No statistically significant differences (p = 0.273) were found in fracture load between median values of groups A (860 N) and B (1059 N). In group A, 60% of the specimens demonstrated catastrophic root fractures and 40% mixed crown fractures (tooth cusp and restoration), whereas in group B, no root fractures were found, and the failure modes were equally distributed between mixed fractures as above and fracture of the buccal cusp. These differences were statistically significant (p = 0.004). The combination of the glass-FRC bulk fill liner with the PFC diminished the catastrophic root fractures induced by FRC posts, at a similar or higher fracture load.

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Guo, Baohua, and Hangyu Dong. "Shear failure modes and AE characteristics of sandstone and marble fractures." Open Geosciences 11, no. 1 (June 12, 2019): 249–62. http://dx.doi.org/10.1515/geo-2019-0020.

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Abstract To study the shear failure modes of rock fractures with different morphologies, rock types and test conditions, direct shear tests were conducted with the aid of an acoustic emission test system to obtain the characteristics of acoustic emissions in the shear process. The test results indicated that sandstone fractures experienced brittle shear failure under higher constant normal loads (15-30 kN) and plastic shear failure under lower normal loads (5 kN and 10 kN), while the marble fracture experienced plastic shear failure under each normal load. Dropping of shear stress, sharp change from shear dilatation to shear shrinkage and sudden release of high AE energy could be found when brittle shear failure occurred in sandstone fracture under a higher normal load. Thus, combining the location evolution characteristics of acoustic emission, it can be concluded that the entire shear dislocation of sandstone fracture in brittle shear failure mode happened just after the peak under higher normal loads. However, the entire shear dislocation of sandstone fracture under lower normal loads and marble fracture under all normal loads occurred just at the beginning of the shear process.

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Ti, Zhengyi, Jiazhen Li, Meng Wang, Kang Wang, Zhupeng Jin, and Caiwang Tai. "Fracture Mechanism in Overlying Strata during Longwall Mining." Shock and Vibration 2021 (June 21, 2021): 1–15. http://dx.doi.org/10.1155/2021/4764732.

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We used the key stratum theory to establish a more realistic thin-plate mechanical model of elastic foundation clamped boundary and study the fracture mechanism of overlying strata during longwall mining. We analyzed the fracture characteristics and factors affecting fracture of the key stratum combined with the Mohr–Coulomb yield criterion. Besides, we used numerical simulation methods to verify the evolution pattern of the overlying strata fracture. The results show that the fracture mechanisms of the elastic foundation clamped structure’s key stratum varied depending on the position under longwall mining. The advanced coal wall area of the upper surface is a compressive-shear fracture. The center area of the lower surface is a tensile fracture. With the increase of the excavation length and the load of the key stratum, the central area and the advanced coal wall area of the long side are fractured before the advanced coal wall area of the short side. With the increase of flexural rigidity of the key stratum, the advanced coal wall area of the long side fractures before the central area and the advanced coal wall area of the short side. With the increase of the foundation modulus and the advanced load of the key stratum, the central area fractures before the surrounding advanced coal wall area. The advanced influence distance was positively correlated with the key stratum’s flexural rigidity and advanced load and negatively correlated with the foundation modulus and excavation length. The advanced influence distance was not affected by the load of the key stratum. The numerical simulation results show that, with the increase of the mining area, the fracture trace of overlying strata in goaf extended to the coal wall’s interior. The fracture range of overlying strata is larger than that of the miningd: area. This study has a practical value for water disasters, gas outbursts, and rock strata control.

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Hadad, Henrique, Luara Teixiera Colombo, Laís Kawamata de Jesus, Ana Flávia Piquera Santos, Paulo Sérgio Perri de Carvalho, Francisley Ávila Souza, and Ana Paula Farnezi Bassi. "Rehabilitation of atrophic mandible with implants. Strategy and case report of fracture complication." Research, Society and Development 9, no. 10 (September 26, 2020): e2899108588. http://dx.doi.org/10.33448/rsd-v9i10.8588.

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Rehabilitation through implant-supported prosthesis on atrophic jaws presents great deal of difficulty. Mandible fractures related to implants is not a common complication, however when it occurs, it represents serious damage. The aim of this paper was to report a clinical case of a 63-year-old patient with mandibular fracture after implant installation, treated through a buccal access and load-shearing plate system to stabilize the fractured bone and reduce the discomfort. The use of load shearing plate presented good results in this case, stabilizing the bone fracture, and helping with the repairing process, enabling subsequent rehabilitation of the patient, with a 3-year follow-up.

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Fahim, Daniel K., Kay Sun, Wafa Tawackoli, Ehud Mendel, Laurence D. Rhines, Allen W. Burton, Daniel H. Kim, Bruce L. Ehni, and Michael A. K. Liebschner. "Premature Adjacent Vertebral Fracture After Vertebroplasty: A Biomechanical Study." Neurosurgery 69, no. 3 (April 14, 2011): 733–44. http://dx.doi.org/10.1227/neu.0b013e31821cc499.

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Abstract BACKGROUND: There is an increased incidence of fractures in untreated adjacent vertebrae after vertebroplasty. OBJECTIVE: To introduce unconstrained 6 degrees of freedom biomechanical testing to investigate whether vertebroplasty lowered the fracture strength of adjacent untreated vertebrae under physiological loading conditions and to describe the observed fracture pattern. METHODS: Three-level spinal segments (T10-12 and L1–3) from 6 spines were tested under unconstrained axial compression in which shear forces and torque were minimized using a 6-degrees of freedom robotic arm. Fracture initiation loads and ultimate failure loads of lumbar segments were predicted from the corresponding thoracic segments by assuming constant fracture stress along the spinal column. The predicted values were compared with postvertebroplasty experimental values of the lumbar spine segments. Plain radiographs were taken at 600-N increments to record the developing fracture pattern. RESULTS: All 6 vertebroplasty group specimens experienced reductions in fracture strengths ranging from 27.4% to 47.6% with an average decrease of 32.6% (P < .002) and reductions in ultimate failure load ranging from 1.6% to 47.3%, with an average decrease of 34.7% (P < .003) compared with predicted values from the nonvertebroplasty group. In all vertebroplasty group specimens, the superior and inferior endplates of the untreated middle vertebral body (L2) were deflected, whereas 5 of the 6 nonvertebroplasty group specimens did not show any evidence of endplate deflection. CONCLUSION: Vertebroplasty altered the load transfer along the anterior spinal column, thereby statistically significantly increasing fracture risk and ultimate failure load of the untreated adjacent vertebrae. The radiographic findings support the endplate deflection fracture mechanism as the cause of adjacent fractures after vertebroplasty.

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Eggermont, F., L. C. Derikx, N. Verdonschot, I. C. M. van der Geest, M. A. A. de Jong, A. Snyers, Y. M. van der Linden, and E. Tanck. "Can patient-specific finite element models better predict fractures in metastatic bone disease than experienced clinicians?" Bone & Joint Research 7, no. 6 (June 2018): 430–39. http://dx.doi.org/10.1302/2046-3758.76.bjr-2017-0325.r2.

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Objectives In this prospective cohort study, we investigated whether patient-specific finite element (FE) models can identify patients at risk of a pathological femoral fracture resulting from metastatic bone disease, and compared these FE predictions with clinical assessments by experienced clinicians. Methods A total of 39 patients with non-fractured femoral metastatic lesions who were irradiated for pain were included from three radiotherapy institutes. During follow-up, nine pathological fractures occurred in seven patients. Quantitative CT-based FE models were generated for all patients. Femoral failure load was calculated and compared between the fractured and non-fractured femurs. Due to inter-scanner differences, patients were analyzed separately for the three institutes. In addition, the FE-based predictions were compared with fracture risk assessments by experienced clinicians. Results In institute 1, median failure load was significantly lower for patients who sustained a fracture than for patients with no fractures. In institutes 2 and 3, the number of patients with a fracture was too low to make a clear distinction. Fracture locations were well predicted by the FE model when compared with post-fracture radiographs. The FE model was more accurate in identifying patients with a high fracture risk compared with experienced clinicians, with a sensitivity of 89% versus 0% to 33% for clinical assessments. Specificity was 79% for the FE models versus 84% to 95% for clinical assessments. Conclusion FE models can be a valuable tool to improve clinical fracture risk predictions in metastatic bone disease. Future work in a larger patient population should confirm the higher predictive power of FE models compared with current clinical guidelines. Cite this article: F. Eggermont, L. C. Derikx, N. Verdonschot, I. C. M. van der Geest, M. A. A. de Jong, A. Snyers, Y. M. van der Linden, E. Tanck. Can patient-specific finite element models better predict fractures in metastatic bone disease than experienced clinicians? Towards computational modelling in daily clinical practice. Bone Joint Res 2018;7:430–439. DOI: 10.1302/2046-3758.76.BJR-2017-0325.R2.

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Dissertations / Theses on the topic "Fracture load"

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Reynolds, Mark Andrew. "Load-sensitive fluid-flow through fracture-matrix systems." Thesis, Heriot-Watt University, 2004. http://hdl.handle.net/10399/354.

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Lewis, Simon John. "Influences of load history on the cleavage fracture of steels." Thesis, University of Bristol, 2009. http://hdl.handle.net/1983/1b443efe-3979-4c72-a577-a2eec3fd9ccd.

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As part of a safety assessment of a component or structure, it is necessary to define in a rigorous manner the limits for its safe use and operation. This requirement leads to a need for accurate descriptions of the conditions for failure. In determining safe operating limits for failure by fracture, current methods are often overly pessimistic, especially following load history or in the presence of residual stress. Such conservatisms may lead to overdesign and excessive weight or premature removal of infrastructure from service. A study was conducted, described in this thesis, on the influences of previous load cycles on brittle fracture, primarily in A533B ferritic steel. Potential influences of remnant stresses on measured fracture toughness were explored by extracting test coupons from large scale welded components. Finite element simulations and experimental stress measurement were used to infer the effect on measured toughness. Re-analysis of previously published experimental data highlighted a range of limitations and practical problems with a number of current fracture criteria. To investigate the issues highlighted in greater depth, a program of fracture testing was conducted covering a wide range of specimen constraint levels and considering specimens with and without prior load history. The resulting fracture data set was used to study the applicability of numerous local approach methods, as well as crack tip fracture parameters, in terms of their transferability between geometries and ability to predict the effects of load history. It was shown that the effect of prior loading on fracture behaviour can be extremely significant. It was seen that the local approach, if properly calibrated, is able to predict the influence of load and geometry on fracture to an acceptable accuracy. It was also seen that consideration of fracture, even under brittle conditions, as a stress and strain controlled process improved the quality of the model predictions.

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Elliott, David. "Corrosion inhibitors for load-bearing steels." Thesis, University of Oxford, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303645.

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Boseman, Mark F. "Study of load transfer and fracture on composite-to-metal-wire joints." Thesis, Monterey, Calif. : Naval Postgraduate School, 2009. http://edocs.nps.edu/npspubs/scholarly/theses/2009/March/09Mar%5FBoseman.pdf.

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Thesis (M.S. in Mechanical Engineering)--Naval Postgraduate School, March 2009.
Thesis Advisor(s): Kwon, Young W. "March 2009." Description based on title screen as viewed on April 23, 2009. Author(s) subject terms: butt joint, overlap joint, modified-wire-end-shape joint, finite element method, energy release rate, virtual crack closure method, fracture toughness, ansys. Includes bibliographical references (p. 43). Also available in print.

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Alshahrani, Faris. "A Load-to-Fracture and Strain Analysis of Monolithic Zirconia Cantilevered Frameworks." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1468956378.

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Xiao, Jing. "Damage and fracture of brittle viscoelastic solids with application to ice load models." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0019/NQ47510.pdf.

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Dube, Thobile Thenjiwe. "Measuring the fracture energy of bed breakage using a short impact load cell." Master's thesis, University of Cape Town, 2017. http://hdl.handle.net/11427/25270.

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Particle fracture is the elementary process that governs comminution. In industrial machines particle breakage occurs mainly through three mechanisms: impact, abrasion and attrition. Of these mechanisms, impact breakage is known to be the most basic form of particle size reduction. Comminution devices are highly inefficient, as the energy used for particle breakage relative to that consumed by the equipment is low and reported to be between 1-2 %. As such, understanding the fundamentals of particle fracture is crucial for the development of energy efficient particle size reduction methods. Research done towards investigating particle fracture under impact loading has led to the development of several devices which include the twin pendulum device, drop weight tester, Split Hopkinson Pressure Bar, Rotary Breakage Tester and the Short Impact Load Cell. In this study the Short Impact Load Cell (SILC) was used to conduct bed breakage experiments on partially confined particles. Breakage tests using this device were conducted by vertically releasing a steel ball of known mass onto a bed of particles from a known height. The bed rested on a steel rod which was fitted with strain gauges to measure the particle response to impact loading. Tests were conducted on two ores, blue stone and UG2, to investigate the effect of three variables: steel ball mass, drop height and bed depth on the breakage behaviour of particles. The effect of each variable was investigated by evaluating the peak forces obtained, the particle fracture energy and the degree of particle breakage attained. For both ores it was found that the peak force increased linearly with increasing steel ball mass and drop height, and it was found that the drop height had a greater effect on the peak force than the steel ball mass. The maximum peak forces were obtained at one layer of particles and increasing the bed depth generally led to a reduction in the peak force. An exponential relationship was found between the peak force and bed depth, where the peak force decreased with increasing bed depth. It was found that the blue stone particles did not break at the range of input energies used in this work, therefore no fracture energy results were reported for blue stone. The fracture energy values for UG2 were low, where the maximum energy used for particle fracture was 2.7 % of the input energy. There was no direct correlation between the fracture energy and the steel ball mass, drop height and bed depth; however it was found that the bed depth had a larger effect on the fracture energy compared to both the steel ball mass and drop height. The greatest amount of energy used for fracture was generally obtained at the largest input energies using the 357 and 510 g balls. The optimum drop height which resulted in the highest fracture energy was generally found to be either 240 or 300 mm. A bed depth of five layers was found to be the optimum bed depth that allowed for the highest amount of energy to be utilized for breakage. No breakage results were obtained for blue stone due to the hardness and stiffness of the ore. For UG2, tests conducted at the same bed depth showed a trend in which the breakage initially increased greatly with increasing input energy; however at larger input energies the breakage obtained approached a constant value. Although the input energy was varied by changing both the steel ball mass and the drop height, the results showed that the degree of breakage was more dependent on the steel ball mass compared to the drop height. For all tests conducted, the maximum breakage was obtained at one layer of particles and increasing the bed depth led to a decrease in the breakage obtained. The results showed that the fracture energy and the degree of breakage were not directly related. It was found that there is an optimum amount of energy utilized for fracture that leads to the greatest breakage, where an in increase in the energy beyond the optimum point does not significantly affect the breakage obtained.

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Fellows, Lesley. "Fatigue crack growth under variable stress ratios and complex load history." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325898.

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Lee, Hongchul. "Advanced aircraft service life monitoring method via flight-by-flight load spectra." Diss., Online access via UMI:, 2009.

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Thesis (Ph. D.)--State University of New York at Binghamton, Thomas J. Watson School of Engineering and Applied Science, Department of Mechanical Engineering, 2009.
Includes bibliographical references.

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Alsaery, Amani Saleh. "Strain and load-to-fracture comparison of CAD-CAM dental implant crown materials under loading." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1483730173077362.

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Books on the topic "Fracture load"

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Chona, R., and WR Corwin, eds. Rapid Load Fracture Testing. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 1992. http://dx.doi.org/10.1520/stp1130-eb.

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Wanhill, R. J. H. Spacecraft sustained load fracture control. Amsterdam: National Aerospace Laboratory, 1989.

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Papini, Marcello. Fracture load prediction of structural adhesive joints. Ottawa: National Library of Canada, 1993.

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Wanhill, R. J. H. A test plan for sustained load fracture control verification. Amsterdam: National Aerospace Laboratory, 1989.

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Martin, Roderick H. Interlaminar fracture characterization: A current review. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1991.

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Rösler, Joachim. Mechanical behaviour of engineering materials: Metals, ceramics, polymers, and composites. Berlin: Springer, 2007.

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Minnetyan, Levon. Progression of damage and fracture in composites under dynamic loading. [Washington, D.C.]: National Aeronautics and Space Administration, 1990.

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Gotsis, Pascal K. Progressive fracture of fiber composite thin shell structures under internal pressure and axial loads. [Washington, DC]: National Aeronautics and Space Administration, 1996.

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Gotsis, Pascal K. Progressive fracture of fiber composite thin shell structures under internal pressure and axial loads. [Washington, DC]: National Aeronautics and Space Administration, 1996.

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Salem, J. A. Fracture toughness of Si₃N₄ measurement with short bar chevron-notched specimens. [Cleveland, Ohio: National Aeronautics and Space Administration, Lewis Research Center, 1985.

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Book chapters on the topic "Fracture load"

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Ožbolt, J., R. Eligehausen, and H. W. Reinhardt. "Size effect on the concrete cone pull-out load." In Fracture Scaling, 391–404. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4659-3_22.

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Etube, L. S. "Service Load Simulation." In Fatigue and Fracture Mechanics of Offshore Structures, 43–76. Chichester, UK: John Wiley & Sons, Ltd, 2014. http://dx.doi.org/10.1002/9781118903018.ch2.

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Broek, David. "Load spectra and stress histories." In The Practical Use of Fracture Mechanics, 168–207. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2558-8_6.

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Wang, Q., and Kimihiro Ozaki. "Surface Stress Evaluation from Indentation Load-Depth Curves." In Fracture and Damage Mechanics V, 89–92. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-413-8.89.

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Sanglebœuf, Jean-Christophe, and Tanguy Rouxel. "Indentation and Scratching of Glass: Load, Composition and Temperature Effects." In Fracture Mechanics of Ceramics, 121–33. Boston, MA: Springer US, 2005. http://dx.doi.org/10.1007/978-0-387-28920-5_11.

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Fan, Wen Xin, Wei Dong Song, and Jian Guo Ning. "Critical Load between Sea Ice and Sea Structure." In Fracture and Strength of Solids VI, 715–20. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-989-x.715.

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Katz, Y., M. Kupiec, and A. Bussiba. "Load Interaction Toughening under Monotonic and Cyclic Conditions." In Fracture of Engineering Materials and Structures, 558–63. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3650-1_81.

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Gdoutos, E. E. "Experimental Determination of J from Load — Displacement Records." In Problems of Fracture Mechanics and Fatigue, 243–45. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-2774-7_52.

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Bao, Yumei, Guozhong Chai, and Weina Hao. "Fracture Mechanics Analysis of Coatings Under Contact Load." In Advanced Ceramic Coatings and Interfaces II, 167–74. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2009. http://dx.doi.org/10.1002/9780470339510.ch17.

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Fu, Yi, Xin Hua Ji, Jin Long Chen, and Yu Wen Qin. "A Simple Mechanism Solution for Predicting the Collapse Loads of I-Beams Subjected to Concentrated Load." In Fracture and Strength of Solids VI, 703–8. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-989-x.703.

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Conference papers on the topic "Fracture load"

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Ural, Ani. "Evaluation of Fracture Load in Human Radius via Cohesive Finite Element Modeling." In ASME 2009 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2009. http://dx.doi.org/10.1115/sbc2009-204316.

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Osteoporotic and age-related fractures are a significant public health problem. One of the most common osteoporotic fracture sites in the aging population is distal radius. There is evidence in the literature that distal radius fractures (Colles’ fracture) are an indicative of increased risk of future spine and hip fractures [1]. Therefore, developing new methods for accurate evaluation of human radius fracture risk is necessary. The previous studies showed that geometrical properties of the radius correlate with its fracture load [2]. However, the combined effect of geometrical and material properties on fracture load has not been studied.

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Sharples, J. K., P. M. James, L. A. Higham, P. M. Wood, H. Teng, D. W. Beardsmore, M. R. Goldthorpe, A. H. Sherry, and C. T. Watson. "Load and Crack History Effects on Fracture." In ASME 2007 Pressure Vessels and Piping Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/pvp2007-26069.

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Assessments of the integrity of structures containing defects or cracks require estimates to be made of the elastic-plastic crack driving force (CDF) parameter J. This is the characterising parameter that controls the intensity of the fields of stress and strain close to the tip of a crack. Such estimates of J are inherently made in assessment procedures such as R6, Revision 4 [1]. Engineering components are typically subjected to load cycles, often with significant variations in magnitude. Normal operation cycles or overload (by a proof pressure test for example) may cause a re-distribution of weld residual stresses. A defect can be present at fabrication or develop during operation due to a sub-critical process such as fatigue or stress corrosion cracking. In these two cases, it is reasonable to suppose that the actual crack driving forces are different; since the development of a defect in a region of weld residual stress, in conjunction with additional primary loading, can cause significant non-proportional loading of the crack tip. The objective of the work described in this paper is to provide more accurate estimates of the crack driving force parameter for defects subjected to combined primary and secondary stresses, taking into account the effects of loading hisotory. The eventual aim is to reduce uncertainty in assessments of plant integrity, and to clarify advantage that can be taken from a reduction in crack driving forces due to weld residual stress resulting from overload, operational cycles and the progressive introduction of sub-critical defects. Finite element analyses and R6 calculations are undertaken and compared to examine the effects of inserting a crack at different times during the life of an engineering structure.

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Das, Sreekanta, J. J. Roger Cheng, and David W. Murray. "Fracture in Wrinkled Linepipe Under Monotonic Loading." In 2002 4th International Pipeline Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/ipc2002-27097.

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Buried pipelines may undergo large deformations due to geotechnical movements, temperature effects, and fluid pressure which result in axial loads, shear loads, moments and various complex combinations of these loads and load histories. Consequently, localized buckles and wrinkles may form in the pipe wall and, subsequently, fractures may develop at wrinkle locations. Previous research showed that large deformation due to monotonically applied symmetric loading can produce accordion type wrinkle geometry but fracture is not normally produced unless strain reversals at the wrinkle location occur due to the application of variable loads. Recently, a field fracture that developed in an NPS10 pipe was brought to University of Alberta Structures Laboratory for investigation. From the description of the load history at the failure location, and the inspection of the deformed geometry and fracture surface, it was recognized that no significant strain reversals had occurred in this particular wrinkled pipe segment. Examination implied that the final failure was a “tearing” failure resulting from monotonic application of a longitudinal load not aligned with the axis of the pipe. However, the true load history that caused the pipe to fracture at the wrinkle location was unknown. To verify the nature of the failure mechanism, and determine the characteristics contributing to its formation, it was felt necessary to attempt to reproduce similar failures in a wrinkle by subjecting it simultaneously to monotonically applied axial load and shear. Two full-scale tests applying axial load, and a shear load with different boundary conditions were carried out on NPS12 pipe. The second test produced a deformed geometry and a fracture configuration very similar to the one that developed in the field. This paper describes the test procedure for these two tests and the mechanics of the fracture. It is concluded that, with the appropriate load history and boundary conditions, fractures can be triggered at wrinkle locations by monotonic loading histories.

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THOMAS, DAVID, and ROBERT WETHERHOLD. "Load redistribution considerations in the fracture of ceramic matrixcomposites." In 33rd Structures, Structural Dynamics and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1992. http://dx.doi.org/10.2514/6.1992-2494.

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Zhang, Timothy G., Kimberly A. Thompson, and Sikhanda S. Satapathy. "Role of Skull Fracture on Load Transfer to Brain." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-68185.

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This study focuses on the effect of skull fracture on the load transfer to brain for low velocity frontal impact of head against a rigid wall. The skull was modeled as a cortical-trabecular-cortical layered structure in order to better capture the skull deformation and consequent failure. The skull components were modeled with an elastoplastic with failure material model. Different methods were explored to model the material response after failure, such as eroding element technique, conversion to fluid, and conversion to SPH particles. The transmitted pressure in the brain was observed to increase with skull fracture.

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FISH, JOHN, and KOI MARCUCELLI. "INTERLAMINAR FRACTURE OF GRAPHITE/EPOXY LAMINATES UNDER TORSION LOAD." In 34th Structures, Structural Dynamics and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1993. http://dx.doi.org/10.2514/6.1993-1458.

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Sepehri, B., G. Rouhi, A. Ashofteh Yazdi, and M. Bahari Kashani. "Effect of load direction on fracture type in tibia." In 2010 17th Iranian Conference Of Biomedical Engineering (ICBME). IEEE, 2010. http://dx.doi.org/10.1109/icbme.2010.5704991.

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Van Zijl, Gideon, and Leon de Beer. "an SHCC overlay retrofitting strategy for unreinforced load bearing masonry." In 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures. IA-FraMCoS, 2016. http://dx.doi.org/10.21012/fc9.290.

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Abdel, M. "Simplified Design Approach of Steel Fiber Reinforced Concrete Under Flexural Load." In 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures. IA-FraMCoS, 2019. http://dx.doi.org/10.21012/fc10.234838.

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Ghantous, Rita-Maria, Alain Millard, Stéphane Poyet, Raoul François, Valérie L'Hostis, and Nhu-Cuong Tran. "Experimental and numerical characterisation of load-induced damage in reinforced concrete members." In 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures. IA-FraMCoS, 2016. http://dx.doi.org/10.21012/fc9.018.

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Reports on the topic "Fracture load"

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Brust, F. W., P. Krishnaswamy, and B. S. Majumdar. An investigation of the effects of history dependent damage in time dependent fracture mechanics, variable load conditions. Office of Scientific and Technical Information (OSTI), November 1992. http://dx.doi.org/10.2172/7019350.

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Christine, Lozano, and Riveros Guillermo. Classical and innovative methods of fatigue and fracture repairs in navigation steel structures. Engineer Research and Development Center (U.S.), April 2021. http://dx.doi.org/10.21079/11681/40422.

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Most of the hydraulic steel structures (HSS) in the U.S. have reached or have past their design life, which leads to unsatisfactory performance. Welded connections with low fatigue resistance, poor weld quality, unanticipated structural behavior, or unexpected loading due to the deterioration of the design boundary conditions are the causes of fatigue cracking. The purpose of this report is to identify and evaluate the traditional and new methods used for fatigue and fracture repairs in navigation steel structures to restore their load carrying capacity and fatigue and fracture resistance. The final objective was to generate a guidance report comprising of recommended and more efficient repair methods for the different fatigue limit states observed in navigation steel structures.

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Brust, F. W., P. Krishnaswamy, and N. D. Ghadiali. An investigation of the effects of history dependent damage in time dependent fracture mechanics, Phase 1, constant load conditions. Office of Scientific and Technical Information (OSTI), November 1991. http://dx.doi.org/10.2172/6112542.

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Brust, F. W., P. Krishnaswamy, and N. D. Ghadiali. An investigation of the effects of history dependent damage in time dependent fracture mechanics, Phase 1, constant load conditions. Progress report. Office of Scientific and Technical Information (OSTI), November 1991. http://dx.doi.org/10.2172/10106306.

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Brust, F. W., P. Krishnaswamy, and B. S. Majumdar. An investigation of the effects of history dependent damage in time dependent fracture mechanics, variable load conditions. Progress report, Phase 2. Office of Scientific and Technical Information (OSTI), November 1992. http://dx.doi.org/10.2172/10191403.

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Brust, F. W., P. Krishnaswamy, and B. S. Majumdar. An investigation of the effects of history dependent damage in time dependent fracture mechanics; Phases I, II, and one half of Phase III - variable load conditions. Progress report. Office of Scientific and Technical Information (OSTI), October 1993. http://dx.doi.org/10.2172/10182458.

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Dodds, Jr, R. H. Constraint effects on fracture initiation loads in HSST wide-plate tests. Office of Scientific and Technical Information (OSTI), December 1994. http://dx.doi.org/10.2172/10106607.

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Ghassemi, Ahmad. Fracture Propagation and Permeability Change under Poro-thermoelastic Loads & Silica Reactivity in Enhanced Geothermal Systems. Office of Scientific and Technical Information (OSTI), October 2009. http://dx.doi.org/10.2172/1021468.

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Mohan, R., C. Marschall, P. Krishnaswamy, F. Brust, N. Ghadiali, and G. Wilkowski. Effects of toughness anisotropy and combined tension, torsion, and bending loads on fracture behavior of ferritic nuclear pipe. Office of Scientific and Technical Information (OSTI), April 1995. http://dx.doi.org/10.2172/64038.

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