Acceleration loads

To study the lowest pressure region from about 10 MPa, the acceleration loading pulse method previously used by Setchell [88S01] has been employed. In this case the slowly rising stress pulse from high quality fused quartz is in the form of a ramp in pressure. Hence, a continuous response can be determined to stresses up to about 3 GPa. 

Speed acceleration Load up Operation Load down Speed deceleration... 

Provision of a means of starting the motor, taking into account the requirements of torque, acceleration, load, frequency of operation and safety ... 

A moment/force couple applied to a rotor such as a shaft in order to sustain acceleration/load requirements. A twisting load imparted to shafts as the result of induced loads/speeds. 

Whatever system is used, it may prove valuable in some circumstances to be able to reduce the beam intensities of the most abundant isotope to reduce accelerator loading. This can in principle be easily accomplished with sequential injection by... 

Based on a limited amount of test data, it appears that the units may not be able to meet specific local air pollution codes. Particulate stack plumes are visible, especially when operation requires an accelerated loading schedule to lower primary combustion temperatures. 

Perret J., A.-G. Dumont, and J.-C. Turtschy. 2004. Assessment of resistance to rutting of high modulus bituminous mixtures using full-scale accelerated loading tests. Proceedings of 3rd Eurasphalt Eurobitume Congress, Vienna, Vol. II, p. 1520. 

Azari H., G. Al-Khateeb, A. Shenoy, and N.H. Gibson. 2007. Comparison of simple performance test IE I of accelerated loading facility mixtures and prediction IE I Use of NCHRP 1-37A and Witczak s new equations. Transportation Research Record Journal of the Transportation Research Board, Vol. 1998, pp. 1-9. 

Question by R. Spaulding, Aro-Firewel Inc. Has this equipment been subjected to high-gravity acceleration loading during operation What effect on transport efficiency has been noted ... 

Answer by author Tests have not been performed with liquid transfer systems operating under unusual acceleration loads. Of course, infrared cooling applications are rarely expected to require operation for prolonged periods under high-gravity loads and residual capacity can be provided in the system to assure continued cooling during short periods of interrupted liquid flow."... 

Structure. Spacecraft structures must satisfy the competing requirements of strength and low weight Spacecraft structures must not bend or sag under the acceleration loads experienced during launch. Nuts... 

Ex. 3. Natural, Hycar, Paracril, and butyl and neoprene mbbers are bonded to seven metals/alloys with an adhesive comprising 50 parts of a chlorinated rubber ( Alloprene B) and 100 parts of Vulcabond TX (XIII) dissolved in 150 parts of ethylene dichloride. Bonds to copper and Monel metal were inferior. Information is provided on the effect on bond strength of accelerator, loading types (carbon blacks, white fillers) in the bonded stocks, and the age of the fully formulated adhesive. 

For a tension member, such as a cable, the cross-sectional area required is a function of the mass of the inner vessel and the design acceleration loads... 

The SNL fuel assembly shaker table test campaign offered a source of validation data for the PWR fuel assembly model. The test campaign subjected a surrogate fuel assembly to shock acceleration loads while the surrogate fuel assembly was instmmented with a number of accelerometers and strain gauges. Comparison of the body of recorded test data to the calculated model results offered quantifiable evidence of the model s ability to predict realistic response of the key areas of dynamic response of the fuel assembly and local strains. A detailed report of the shaker table modehng is provided by Klymyshyn et al. and shows that the assembly-level model is in reasonable agreement with the shaker table data. 

Accelerations associated with quasi-steady flight events are generated by engine-induced and external forces, which change slowly with time and for which the elastic responses are relatively small. Low frequency (<80 Mz) vibratory accelerations acting through the Spaceship c.g. induced by various launch vehicle dynamics events are added to the appropriate quasi-steady accelerations to. produce worst-case quasi-static acceleration loads for Spaceship structural design purposes. Typical maximum accelerations are approximately 6 g s in the axial direction and 3 g s in the lateral diredion. (Ref 10-2,10-15)... 

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