Fatigue durability

As is evident from the conducted studies, the majority of problems within this sector are veiy typical of the plastic industry in general. These include the need to improve reinforcement, durability, fatigue resistance, adhesion, reduce water absorption, etc. In addition to these problems are some issues which are only related specifically to medical applications such as toxicity and biocompatibility. These issues make this research an exclusive field in which the publication of findings is... 

Comparison of properties (tensile, shear, peel, flexural, impact and cleavage strength, durability, fatigue, environmental resistance, conductivity, etc.). 

Significant scatter is often evident in time to failure data obtained from stress rupture tests conducted on either neat materials or on bonded joints. This scatter may obscure trends and frustrate the user. Results are typically plotted as load level versus the time to failure, a form that is analogous to S-N plots used in fatigue tests (see Durability Fatigue). In keeping with the principles of polymer physics, the time to failure axis should be plotted on a log scale, as illustrated in Fig. 1. Many creep-rupture models for homogeneous materials are based on forms like... 

Further consideration relating mechanics to joint design are given in Joint design strength and fracture perspectives, Durabiiity creep rupture. Durability subcritical debonding and Durability fatigue. 

An important consideration in bonded structure design is the tolerance of joints to impact fatigue conditions (see Durability fatigue). Recent studies suggest that a crack, once initiated, may propagate through the adhesive at low levels of applied energy. 

A further discussion of the topic can be found in Engineering design with adhesives and other relevant considerations in Durability creep rupture and Durability fatigue. 

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... 

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