This chapter presents the energy dissipation approach for analyzing surface contact damages in various materials, including composite materials. As known, surface contact is a very common phenomenon, which can be found in daily life and many scientific and engineering problems. The contact of different bodies can be modeled as indentation. Analysis of indentation and modeling of the deformation...

Stress-gradient materials are generalized continua with two stress variables: the Cauchy field and its gradient. For homogenization purposes, we introduce an extension to stress-gradient of principle Hashin Shtrikman. The variational is first stated within framework periodic homogenization, then extended random homogenization. Contrary usual derivation classical principle, adopt here a stress-b...

AIM To determine the prevalence of American College of Rheumatology (ACR) and Systemic Lupus International Collaborating Clinics (SLICC) classification criteria among systemic lupus erythematosus (SLE) patients; to determine disease activity and severity; and to investigate the correlation of classification criteria with disease activity, and of disease activity and damage index with disease du...

The failure to achieve satisfactory results will cause immense losses in major projects. Nevertheless, the modeling limitations and phenomenon assumptions represented by criteria can significantly influence final results—e.g., damage mode, affecting its quantification—thus representing an interesting topic for technical assessment. This work aims forecast effects of several on occurring due str...

vibration generated by vehicles during road transport has an important effect on the agricultural products damage process, particularly vegetable and fruit. modulus of elasticity is one of the most important mechanical properties of fruits and its variation can be described as one of the damage criteria during transportation. this research was conducted to evaluate the effects of vibration para...