Transient load analysis method for large linear structures with local nonlinearities and its application to Space Shuttle payload load analysis

1985 ◽  
Author(s):  
M. KITAGAWA ◽  
K. KUBOMURA
Keyword(s):  
Space Shuttle ◽  
Analysis Method ◽  
Linear Structures ◽  
Transient Load ◽  
Load Analysis

Working Load Analysis and Strength Estimation for Bolted Joints During Actual Machine Operation

2014 ◽  
Author(s):  
Soichi Hareyama ◽  
Ken-ichi Manabe ◽  
Takayuki Shimodaira ◽  
Akio Hoshi
Keyword(s):  
Bending Moment ◽  
Bolted Joints ◽  
Lifetime Prediction ◽  
Design Stage ◽  
Bolted Joint ◽  
Analysis Method ◽  
Strength Evaluation ◽  
Test Stage ◽  
Machine Operation ◽  
Load Analysis

Serious problems caused by bolted joint fatigue breakage still occur. This is because working load evaluation and durability strength evaluation have been insufficient in the product design stage, in the test stage of machine lifetime prediction, in the trial production stage, in the prototype machine test stage, and so forth. In this paper, we propose a method for measuring and analyzing the load on bolted joints used in a machine under actual operation. Working load measurement under actual machine operation and the results of its analysis are shown as load frequency diagrams. This is very important information for realizing the concept of simultaneous multiple design. An example of the measurement analysis method of the load (three types of the loads; axial force, bending moment, and the torsional torque) added to the bolted joint shank which comes out at the time of the actual machine operation is shown. The reliability of assessing the strength and durability of bolted joints is considered from the viewpoint of limited-lifetime (finite-lifetime) design using Miner’s rule with cumulative loosening damage models and fatigue limit (infinite-lifetime) design. As an example, we measured the working stress and evaluated the strength of a bolted joint of an actual machine to verify the usefulness of the proposed method. Also, examples of strength evaluation are shown to illustrate finite-lifetime and infinite-lifetime prediction. Moreover, the practical process and presumed example of fatigue life prediction are shown. It is considered as a contribution at the improvement of strength reliability and the load analysis method of the bolted joint of machine develop-ment stage and failure analysis stage. Our findings are also expected to eradicating accidents involving bolted joints in machines.

scholarly journals Limit Load Analysis Method for a Pipe with an Axial Shallow Flaw

2013 ◽  
Vol 79 (799) ◽  
pp. 349-353 ◽  
Author(s):  
Kiminobu HOJO ◽  
Masayuki KAMAYA ◽  
Katsumasa MIYAZAKI
Keyword(s):  
Limit Load ◽  
Analysis Method ◽  
Load Analysis

Recovered Transient Load Analysis for Payload Structural Systems

1981 ◽  
Vol 18 (4) ◽  
pp. 374-379 ◽  
Author(s):  
J.C. Chen ◽  
K.P. Zagzebski ◽  
J.A. Garba
Keyword(s):  
Structural Systems ◽  
Transient Load ◽  
Load Analysis

A Comparison Study of Pressure Vessel Design Using Different Standards

2013 ◽  
Author(s):  
Frode Tjelta Askestrand ◽  
Ove Tobias Gudmestad
Keyword(s):  
Stress Analysis ◽  
Elastic Stress ◽  
Limit Load ◽  
Technical Committee ◽  
Pressure Vessels ◽  
Analysis Method ◽  
Elastic Plastic ◽  
Load Analysis ◽  
American Society ◽  
Division 2

Several codes are currently available for design and analysis of pressure vessels. Two of the main contributors are the American Society of Mechanical Engineers providing the ASME VIII code, Ref /4/ and the Technical Committee for standardization in Brussels providing the European Standard, Ref /2/. Methods written in bold letters will be considered in the discussion presented in this paper. The ASME VIII code, Ref /4/, contains three divisions covering different pressure ranges: Division 1: up to 200 bar (3000 psi) Division 2: in general Division 3: for pressure above 690 bar (10000 psi) In this paper the ASME division 2, Part 5, “design by analysis” will be considered. This part is also referred to in the DNV-OS-F101, Ref /3/, for offshore pressure containing components. Here different analysis methods are described, such as: Elastic Stress Analysis Limit Load Analysis Elastic Plastic Analysis The Elastic Stress Analysis method with stress categorization has been introduced to the industry for many years and has been widely used in design of pressure vessels. However, in the latest issue (2007/2010) of ASME VIII div. 2, this method is not recommended for heavy wall constructions as it might generate non-conservative analysis results. Heavy wall constructions are defined by: (R/t ≤ 4) with dimensions as illustrated in Figure 1. In the case of heavy wall constructions the Limit Load Analysis or the Elastic-plastic method shall be used. In this paper focus will be on the Elastic-plastic method while the Limit Load Analysis will not be considered. Experience from recent projects at IKM Ocean Design indicates that the industry has not been fully aware of the new analysis philosophy mentioned in the 2007 issue of ASME VIII div.2. The Elastic Stress Analysis method is still (2012) being used for heavy wall constructions. The NS-EN 13445-3; 2009, Ref /2/, provides two different methodologies for design by analysis: Direct Route Method based on stress categories. The method based on stress categories is similar to the Elastic Stress Analysis method from ASME VIII div. 2 and it will therefore not be considered in this paper.

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