The Experts below are selected from a list of 870 Experts worldwide ranked by ideXlab platform

Wu, Jia Hang - One of the best experts on this subject based on the ideXlab platform.

  • Maximum torque of combination threats for spur gear based on AGMA and JGMA standards
    2014
    Co-Authors: Wu, Jia Hang
    Abstract:

    This thesis is an approach to investigate the transformation curve of gearing safety. Two types of tooth failures are known to happen to spur gears. There are tooth Bending failure (breakage) and tooth surface pitting failure. The focus of this study however will be on the JGMA and AGMA standards of gearing. Different methods were used to gather relevant data from both standards. JGMA data were gathered from a source in the internet while AGMA data were calculated with the aid of Autodesk Inventor spur gear component generator 2013. The most important data is the Allowable torque applied on the gear tooth which can be distinguished into causing either one of the tooth failures mentioned above. Several materials selected from the JGMA and AGMA standards with high value of Allowable contact Stress compared to its Allowable Bending Stress have a transformation curve from surface durability to Bending strength when its torque values are plotted against number of teeth. This allows the forming of a combination threats curve for the material. The curves are useful in determining the maximum torque that can be applied on the spur gear before failures occur. The threat combination curves are then further developed into charts that include other parameters like power, angular velocity and pitch diameters

Muhd Nor, Nik Hisyamudin - One of the best experts on this subject based on the ideXlab platform.

  • Maximum torque of combinations threat for spur gear based on AGMA standard
    2014
    Co-Authors: Sia, Chee Kiong, Hang Wu Jia, Muhd Nor, Nik Hisyamudin
    Abstract:

    This study is an approach to investigate the transformations curve of gearing safety. Two types of failure can occur on a gear namely the Bending Stress and the surface pitting failure. There are many standards for gearing in used worldwide such as AGMA, JGMA, ISO, DIN, etc. but the focus of this study will be on AGMA standard. The main data for this study is the torque value applied which can be distinguished into causing Bending strength or surface pitting failure. The Autodesk Inventor spur gear component accelerator was used as a tool for data acquisition based on the AGMA standard of calculations. Two gear materials with high value of Allowable contact Stress compared to its Allowable Bending Stress was chosen for the study as they are predicted to have a transformation curve from surface durability to Bending strength when its torque values are plotted against number of teeth. This is then repeated on various gear modules for both materials to obtain a series of combination curves useful in determining the maximum torque that can be applied on the spur gear before failures occur either by Bending Stress or surface pitting depending on the curve

Habib J Dagher - One of the best experts on this subject based on the ideXlab platform.

  • relam nonlinear probabilistic model for the analysis of reinforced glulam beams in Bending
    2012
    Co-Authors: Robert F Lindyberg, Habib J Dagher
    Abstract:

    AbstractThe University of Maine, in conjunction with Willamette Industries, Georgia-Pacific, Strongwell, and APA—the Engineered Wood Association, tested 90 fiber-reinforced polymer (FRP)-reinforced glue-laminated wood (glulam) beams. This study showed that a FRP reinforcement ratio of 3% in tension can increase glulam-Allowable Bending Stress (Fb) by more than 100%. Furthermore, this physical testing was used to verify a nonlinear probabilistic computer model for reinforced glulam, called the reinforced laminated (ReLAM) model. ReLAM uses moment-curvature (M-Φ) analysis and Monte Carlo simulation to predict the strength and stiffness of a population of reinforced glulams, requiring as input distributions of the lamstock long-span flatwise-Bending modulus of elasticity (E), ultimate tensile Stress, and ultimate compressive Stress. ReLAM output lists the reinforced glulam modulus of elasticity (MOE) and Fb in terms of the gross cross-sectional dimensions, providing beam properties in the same fashion as the...

Junjae Lee - One of the best experts on this subject based on the ideXlab platform.

  • evaluation of Allowable Bending Stress of dimension lumber confidence levels and size adjustment
    2013
    Co-Authors: Sungjun Pang, Junjae Lee
    Abstract:

    The aim of this study was to investigate the processes for evaluating the Allowable Bending Stress. The confidence levels and the size-adjustment in standards were reviewed with experimental data. The results show that, (1) KS F 2152 was more strict than others overseas standards due to the higher confidence level. The 5% NTL of Bending strengths by a method in KS F 2152 were lower than the overseas stand- ards and more specimens were required for evaluating the structural properties according to KS F 2152. (2) Due to the absence of size-adjustment method in domestic standards, the specified size and the ex- ponential parameters on the size-adjustment equation were reviewed by size factors. The specified size (width: 286 mm, length: 6096 mm), and the exponential parameters (w: 0.29, l: 0.14) will be suitable for developing the Allowable Bending Stress in domestic standard. (3) The size adjusted Allowable Bending Stresses of No. 2 grade Korean pine were lower than the Allowable Stresses tabulated in KBC even though less strict method (75% confidence level) to calculate 5% value was used. The Allowable Stresses tabulated in KBC are needed to be reviewed by continuous experimental data.

Sia, Chee Kiong - One of the best experts on this subject based on the ideXlab platform.

  • Maximum torque of combinations threat for spur gear based on AGMA standard
    2014
    Co-Authors: Sia, Chee Kiong, Hang Wu Jia, Muhd Nor, Nik Hisyamudin
    Abstract:

    This study is an approach to investigate the transformations curve of gearing safety. Two types of failure can occur on a gear namely the Bending Stress and the surface pitting failure. There are many standards for gearing in used worldwide such as AGMA, JGMA, ISO, DIN, etc. but the focus of this study will be on AGMA standard. The main data for this study is the torque value applied which can be distinguished into causing Bending strength or surface pitting failure. The Autodesk Inventor spur gear component accelerator was used as a tool for data acquisition based on the AGMA standard of calculations. Two gear materials with high value of Allowable contact Stress compared to its Allowable Bending Stress was chosen for the study as they are predicted to have a transformation curve from surface durability to Bending strength when its torque values are plotted against number of teeth. This is then repeated on various gear modules for both materials to obtain a series of combination curves useful in determining the maximum torque that can be applied on the spur gear before failures occur either by Bending Stress or surface pitting depending on the curve