Planning cultures in two Chinese transitional cities: Hong Kong and Shenzhen

The infrared (IR) thermography is one of possible tools for the thermal/infrared nondestructive testing (T/INDT). Commonly, it involves quasi-uniform heating of large specimen areas with the choice of heat pulse duration being influenced by specimen diffusivity α and expected defect depth l. The simple estimate of heat transit time τ* is given by the expression which became classical in the T/I NDT theory: τ∗=l2/α

Mechanical and thermomechanical characterization of different leathers

International audienceLeather materials are able to undergo various strain and stress states during their elaboration process and their use in numerous applications. Although the experimental mechanical response in tension of leathers has been studied in the literature for decades, scarce information is available on the nature of their elasticity and more generally on their thermomechanical behaviors. In the present study, two leathers were tested under uniaxial cyclic loading while temperature changes were measured at the specimens’ surface by infrared thermography. The heat power at the origin of the temperature changes was then determined by using an adequate version of heat diffusion equation which is applicable to homogeneous tests. Results enabled us to discuss on the physical nature of the thermoelastic coupling in leathers. Intrinsic dissipation caused by the mechanical irreversibility was also detected. Distinct behaviors are evidenced as a function of the type of leathers

nEDM experiment at PSI: Data-taking strategy and sensitivity of the dataset

status: Published onlin