scholarly journals Effects of Curing Cycle and Loading Rates on the Bearing Stress of Double Shear Composite Joints

2016 ◽  
Author(s):  
Mateja Andrejic
Keyword(s):  
Composite Joints ◽  
Loading Rates ◽  
Double Shear ◽  
Bearing Stress ◽  
Curing Cycle

Experimental Research on Bearing Strength and Effect Laws for Woven GFRP Composite Laminates

2016 ◽  
Vol 705 ◽  
pp. 103-107
Author(s):  
Ling Liu ◽  
Hua Dong Li ◽  
Zhi Yuan Mei
Keyword(s):  
Experimental Research ◽  
Composite Laminates ◽  
Resin Composite ◽  
Stress Range ◽  
Bearing Strength ◽  
Double Shear ◽  
Gfrp Composite ◽  
Increasing Trend ◽  
Bearing Stress ◽  
Woven Glass Fiber

Based on ASTM D 5961 standard, the double-shear bearing strength and effect laws for woven glass fiber/vinyl resin composite laminates are studied. By testing of various specimen, bearing chord stiffness line is properly determined according bearing stress range, and effect laws on bearing strength are analyzed when (±45)°/(0/90)°plies proportion and fastener torque get changed. The results show, with 40%~60% (±45)°plies proportion, the bearing strength and the offset bearing strength simultaneously reach to the high value region with small fluctuation. As fastener torque increases, bearing strength increasing trend gets slow while offset bearing strength first increases and then decreases.

Effect of Washers and Bolt Tension on the Behavior of Double-Lap S2-Glass Fabric Epoxy Composite Joints

2008 ◽  
Author(s):  
Vinayshankar L. Virupaksha ◽  
Sayed A. Nassar
Keyword(s):  
Epoxy Composite ◽  
Bolted Joints ◽  
Glass Fabric ◽  
Composite Joints ◽  
Percentage Increase ◽  
Double Shear ◽  
Bolt Preload ◽  
Load Increase ◽  
Bearing Stiffness

Experimental characterization of thick composite bolted joints is performed to study the effect of washer size and bolt preload on bearing properties. S2-glass fabric-epoxy composite coupons [0/90; +45/−45 @ 10 sets] of 12.5 mm thickness were tested under double shear tensile loading. Two different washer sizes and thicknesses were used in this investigation. A force washer is used to monitor the clamp load variation during the test. It has been found that the initial bolt tension (preload) and washer size have a significant effect on bearing stiffness and bearing strength of thick composite joints. For a low bolt preload, test data shows a significant clamp load increase with the joint displacement. However, the percentage increase in clamp load is reduced as the preload is increased to 50kN. The outward buckling and delamination of the laminate in the composite coupons were found to be the main cause for clamp load increase.

Dynamic strength of adhesively bonded composite joints with similar and dissimilar assembled adherends

2017 ◽  
Vol 36 (23) ◽  
pp. 1683-1692 ◽  
Author(s):  
Boling He ◽  
Dongyun Ge
Keyword(s):  
Dynamic Strength ◽  
Composite Joints ◽  
Adhesively Bonded ◽  
Loading Rates ◽  
Material Stiffness ◽  
Titanium Aluminum ◽  
Bonded Composite ◽  
Pressure Bar ◽  
Distribution Of Stresses ◽  
Selection Of

The effect of similar versus dissimilar assembled adherends, on the dynamic strength of single-lap, adhesively bonded composite joints is investigated. The assembled adherend materials include titanium, aluminum and composite. To this end, split Hopkins pressure bar is used to assess the strength of the joints at high loading rates. The tests show that the dynamic strength of the joints is influenced by the assembled adherend material stiffness, and the highest strength is achieved when using high stiffness adherend materials. Numerical results conclude that the increase in the stiffness of the assembled adherend material alleviates the stress concentration and promotes a more uniform distribution of stresses in the adhesive. The results of this study indicate that the selection of assembled adherend material should be accounted for while designing adhesively bonded composite joints.

Mode-I behavior of adhesively bonded composite joints at high loading rates

2020 ◽  
Vol 198 ◽  
pp. 108310
Author(s):  
Suraj Ravindran ◽  
Subramani Sockalingam ◽  
Karan Kodagali ◽  
Addis Kidane ◽  
Michael A. Sutton ◽  
...  
Keyword(s):  
High Loading ◽  
Mode I ◽  
Composite Joints ◽  
Adhesively Bonded ◽  
Loading Rates ◽  
Bonded Composite

RESEARCH AND EVALUATE TREATMENT EFFICIENCY ON TAPIOCA PROCESSING INDUSTRIAL WASTEWATER BY AEROBIC BIOFILTER TECHNOLOGY WITH VARIOUS MATERIALS

2010 ◽  
Vol 13 (3) ◽  
pp. 54-66
Author(s):  
Phuong Thi Thanh Nguyen ◽  
Phuoc Van Nguyen ◽  
Anh Cam Thieu
Keyword(s):  
Wastewater Treatment ◽  
Industrial Wastewater ◽  
Utilization Rate ◽  
Organic Loading ◽  
Treatment Efficiency ◽  
Research Results ◽  
Loading Rates

This study was performed to evaluate the efficiency of tapioca processing wastewater treatment using aerobic biofilter with variety of biofilter media: coir, coal, PVC plastic and Bio - Ball BB15 plastic. Research results in the lab demonstrated all four aerobic biofilter models processed can treated completely N and COD which COD reached 90-98% and N reached 61-92%, respectively, at the organic loading rates in range of 0.5, 1, 1.5 and 2 kgCOD/m3.day. The results identified coir filter was the best in four researched materials with removal COD and specific substract utilization rate can reach 98%, and 0.6 kg COD/kgVSS.day. Research results open the new prospects for the application of the cheap materials, available for wastewater treatment.

STRENGTH RESEARCH ON MULTI-ROW METAL-COMPOSITE JOINTS

2013 ◽  
Vol 44 (4) ◽  
pp. 559-573
Author(s):  
Yanina Stefanovna Borovskaya ◽  
Vyacheslav Ivanovich Grishin ◽  
Irakliy Nugzarovich Kacharava ◽  
Sergey Mikhaylovich Naumov
Keyword(s):  
Composite Joints ◽  
Metal Composite

Gender differences in the Achilles tendon load during the fencing lunge

2014 ◽  
Vol 6 (3) ◽  
Author(s):  
Jonathan Kenneth Sinclair ◽  
Lindsay Bottoms
Keyword(s):  
Gender Differences ◽  
Achilles Tendon ◽  
Motion Capture ◽  
Tendon Injury ◽  
Force Platform ◽  
Motion Capture System ◽  
3D Motion ◽  
Loading Rates ◽  
Tendon Pathology ◽  
3D Motion Capture

AbstractRecent epidemiological analyses in fencing have shown that injuries and pain linked specifically to fencing training/competition were evident in 92.8% of fencers. Specifically the prevalence of Achilles tendon pathology has increased substantially in recent years, and males have been identified as being at greater risk of Achilles tendon injury compared to their female counterparts. This study aimed to examine gender differences in Achilles tendon loading during the fencing lunge.Achilles tendon load was obtained from eight male and eight female club level epee fencers using a 3D motion capture system and force platform information as they completed simulated lunges. Independent t-tests were performed on the data to determine whether differences existed.The results show that males were associated with significantly greater Achilles tendon loading rates in comparison to females.This suggests that male fencers may be at greater risk from Achilles tendon pathology as a function of fencing training/ competition.

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