After reading this chapter, you should be able to answer the following questions: What is stress, and how is it different than stressors and strains? What are the four main types of stressors? How do individuals cope with stress? How does the Type A Behavior Pattern influence the stress process? How does stress affect job performance and organizational commitment? What steps can organizations take to manage employee stress?
In the range of high strain rates, the mechanical behaviour of materials is characterized by an increased
strain rate sensitivity, by increasing effects of mass inertia forces and by the adiabatic character of the
For the relation between stress, strain and strain rate, empirical formulae are now mostly replaced by
material laws based on structural mechanical models, whose parameters are to be determined by adequate
systematic methods. Also special effects such as the influence of strain rate on...
Despite the wide availability of literature on welding processes, a need exists to regularly update the engineering community on advancements in joining techniques of similar and dissimilar materials, in their numerical modeling, as well as in their sensing and control.
Lee et al. Nanoscale Research Letters 2011, 6:352 http://www.nanoscalereslett.com/content/6/1/352
Structure-dependent mechanical properties of ultrathin zinc oxide nanowires
Wen-Jay Lee1, Jee-Gong Chang1, Shin-Pon Ju2*, Meng-Hsiung Weng2 and Chia-Hung Lee2
Abstract Mechanical properties of ultrathin zinc oxide (ZnO) nanowires of about 0.7-1.1 nm width and in the unbuckled wurtzite (WZ) phase have been carried out by molecular dynamics simulation. As the width of the nanowire decreases, Young’s modulus, stress-strain behavior, and yielding stress all increase.
Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Observation of strong anisotropic forbidden transitions in (001) InGaAs/GaAs single-quantum well by reflectance-difference spectroscopy and its behavior under uniaxial strain
A senior-level undergraduate course entitled “Vibration and Flutter” was taught
for many years at Georgia Tech under the quarter system. This course dealt with
elementary topics involving the static and/or dynamic behavior of structural ele-
ments, both without and with the influence of a flowing fluid. The course did not
discuss the static behavior of structures in the absence of fluid flow because this is
typically considered in courses in structural mechanics.
The American health care system is challenged on many fronts. Every day,
there are reports of medical errors and patient safety concerns. The nation
struggles to provide care for the 15% of the population without health insurance.
Costs continue to grow two to three times faster than the cost of living.
Consumers leave their costly and risky encounters with less and less satisfaction
that they have received the value they feel they deserve and desire.
Soils are aggregates of mineral particles, and together with air and/or water
in the void spaces, they form three-phase systems. A large portion of the
earth’s surface is covered by soils, and they are widely used as construction
and foundation materials. Soil mechanics is the branch of engineering that
deals with the engineering properties of soils and their behavior under
Multibody simulation consists of analyzing the dynamic behavior of a system of interconnected bodies
comprised of flexible and/or rigid components. The bodies may be constrained with respect to each other
via a kinematically admissible set of constraints modeled as joints. These systems can represent an automobile,
a space structure with antenna deployment capabilities, an aircraft as an assemblage of rigid and flexible
parts, a robot with manipulator arms, and so on. In all such cases, the components may undergo large rotation,
large displacement, and finite strain effects....
Female Sexual Dysfunction: Treatment
General An open discussion with the patient is important as couples may need to be educated about normal anatomy and physiologic responses, including role of orgasm in sexual encounters. Physiologic changes associated with aging and/or disease should be explained. Couples may need to be reminded that clitoral stimulation rather than coital intromission may be more beneficial.
Behavioral modification and nonpharmacologic therapies should be a first step. Patient and partner counseling may improve communication and relationship strains.
where tt = time of exposure at the rth combination of stress level and temperature L1 = time required to produce creep strain 8D if entire exposure were held constant at the /th combination of stress level and temperature Stress rupture may also be predicted by (18.78) if the L1 values correspond to stress rupture. This prediction technique gives relatively accurate results if the creep deformation is dominated by stage II steady-state creep behavior. Under other circumstances the method may yield predictions that are seriously in error. ...
With advantages such as high strength, high stiffness, high chemical resistance, light weight…composite tubes are widely applied in urban construction and petroleum industry. In this report, the authors used the displacement method to study the mechanical behavior (stress, strain…) of an infinite hollow cylinder made of composite material under unsteady, axisymmetric plane temperature field. In the numerical calculations, we mainly studied the influence of time and volume ratio of the particle on the displacement and thermoelastic stress of a cylinder made of Titanium /PVC composite.