Effect of Cyclic Loading

Qj = Static compressive capacity Qf = Static tensile capacity (Note Compression loads are +ve, tensile loads are -ve) 

Zone A Cyclically stable. No reduction of load capacity after N cycles 

Zone C Cyclically unstable. Failure within N cycles or fewer 

Main features of cyclic stability diagram. (From Poulos, H.G., /. Geotech. Eng. Dio., ASCE, 114, 877-895, 1988. Reprinted with permission of ASCE.) 

---

Next the effect of cyclic loading on the distribution of a limited solute is investigated. Small and large solutes are considered (glucose, albumin). Both solutes are assumed limited a priori by diffusion and uptake, resulting in equal... 

Data regarding the effects of cyclic loading and creep on the life of brittle matrix composites are limited. The concepts to be developed thus draw upon knowledge and experience gained with other composite systems, such as metal matrix composites (MMCs) and polymer matrix composites (PMCs). The overall philosophy is depicted in Fig. 1.7. 

The effects of cyclic loading are extremely dependent upon the soil and nature of cyclic deformation as shown in the previous section. The potential for pore water pressure generation either in clays, silts, or sands governs their behavior under cyclic loading. Two analytical approaches have been developed to model this behavior. 

The effect of cyclic loading increases with increasing cyclic shear stress levels and the number of cycles. It appears that beneath a certain cyclic shear stress level, cyclic loading has negligible effect. 

The strength profile is determined for two different consolidation levels corresponding to no drainage and full drainage under the submerged weight of the platform. The effect of cyclic load on the reduction of shear strength has also to be taken into account. 

Koutsoftas, D.C. 1978. Effect of cyclic loads on undrained strength of two marine clays. Journal of... 

Nyoni, A.B., Brook, D., 2010. The effect of cyclic loading on the wicking performance of nylon 6.6 yams and woven fabrics used for outdoor performance clothing. Text. Res. J. 80, 720-725. 

Durability creep rupture D A DILLARD Creep under sustained stress Durability fatigue D A DILLARD Effect of cyclic loads... 

Stress distribution shear lag solution D A DILLARD Stresses in shear joints Creep A D CROCOMBE Occurrence protection against creep failure Durability creep rupture D A DILLARD Creep under sustained stress Durability fatigue D A DILLARD Effect of cyclic loads... 

All components in the Reactor Coolant System (RCS) are designed to withstand the effects of cyclic loads due to RCS temperature and pressure changes. These cyclic loads are introduced by... 

Krams, W. E., Effect of Cyclic Loading on the Resistance of 4340 Steel to Stress Corrosion Cracking, M.S. thesis, California State University, Long Beach, CA, December 1985. 

Dynamic Load Response of Plastics Members and Effects of Cyclical Loading... 

Takaku, H. Tokiwai, M. Hirano, H. Effects of Cyclic Loading on Stress Corrosion Cracking Susceptibility for Sensitised Type 304 Stainless Steel in 290°C High-Purity Water... 

Since the effect of cyclic loads is unknown, a more conservative assumption is to assume static loading, however even this assumption can be un-conservative. 

Allameh, S., Akogwu, O., Collinson, M., Thomas, J., Soboyejo, W., 2007. Piezoelectric generators for biomedical and dental applications effects of cyclic loading. J. Mater. Sci. Mater. Med. 18(1), 39 5. 

As shown by Senden et al. [121], conventional material models that incorporate entropic strain hardening give a qualitatively incorrect prediction of the Bauschinger effect. This can be illustrated by investigating the effects of cyclic loading. For a two-arm model such as that of Haward and Thackray, when loaded in tension and then unloaded, during unloading the... 

Joyce, J.A., Hackett, E.M., Roe, C. Effect of Cyclic Loading on the Deformation and Elastic-Plastic Fracture Behavior of a Cast Stainless Steel. David Taylor research Center, DTRC/ SME-91-11 (1991)... 

---