Application of a double linear damage rule to cumulative fatigue.
Double linear damage rule used in conjunction with crack initiation and propagation equations, applied to cumulative fatigue damage
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Double linear damage rule used in conjunction with crack initiation and propagation equations, applied to cumulative fatigue damage
Cumulative metal fatigue damage predicted by double linear damage rule with formulas for crack formation and propagation
Cumulative index of NASA Tech Briefs dealing with electrical and electronic, physical science and energy sources, materials and chemistry, life science, and mechanical innovations
Extended theory of cumulative damage in fatigue when stress amplitude varies from cycle to cycle throughout life of structure
Double linear damage rule for predicting cumulative fatigue damage, crack initiation and propagation and fatigue life, noting improved accuracy
Cumulative index for NASA bibliography on aerospace medicine and biological effects - January 1968
Computer program for reversion of cumulative binomial probability distribution
Cumulative index to NASA survey on technology utilization of aerospace research output
Cumulative errors associated with Category 2 and 3 operations, and terminal flight paths for low visibility landings
Numerical method for calculating cumulative distribution of positive random variable
Cumulative index to continuing bibliography on aerospace medicine and biological effects - 1968
Cumulative probability distribution of positive random variable from moment generating function, exemplifying exponential and Poisson functions
Cumulative binomial function for direct and indirect computation on desk-top calculator
Cumulative index for abstracts of NASA documents on aerospace medicine and biology
This publication is a cumulative index to the abstracts contained in NASA SP-7037 (02) through NASA SP-7037 (13) of Aeronautical Engineering: A Special Bibliography.
A simple device for producing cumulative shock loading in solids is described. The device uses a ballistic-impact-driven projectile to introduce high-stress waves into a solid. The impact time and load amplitude can be varied to produce fracture in one or several impacts in PMMA rods. The wavefront approached a square wave shape. Materials other than PMMA were loaded to failure to demonstrate the versatility of the device. Fracture morphologies observed with optical and scanning-electron microscopy are described.
The octahedral shear strain range concept is used in analyzing multiaxial fatigue damage. Limited test data from a two-step loading sequence show that the loading effect is still pronounced in the multiaxial case and that the relation between damage and cycle ratio is nonlinear. Among uniaxial cumulative damage concepts, the modified multiaxial double linear damage rule seems to show the most favorable experimental results.
This publication is a cumulative index to the abstracts contained in Supplements 99 through 110 of Aerospace Medicine and Biology: A Continuing Bibliography. It includes three indexes - subject, personal author, and corporate source.