Plane stress is a two-dimensional state of stress (Figure 2). This 2-D state models well the state of stresses in a flat, thin plate loaded in the plane of the plate. Figure 2 shows the stresses on the x- and y-faces of a differential element. Not shown in the figure are the stresses in the opposite faces and the external forces acting on the material. Since moment equilibrium of the differential element shows that the shear stresses on the perpendicular faces are equal, the 2-D state of stresses is characterized by three independent stress components (σ ...

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Stress physics, Stress physics - Stress in one-dimensional bodies, Stress physics - Cauchy's principle, Stress physics - Plane stress, Stress physics - Principal stresses, Stress physics - Mohr's circle, Stress physics - Stress in three dimensions, Stress physics - Stress tensor, Stress physics - Generalized notation, Stress physics - Stress measurement, Stress physics - Units, Stress physics - Residual stress, Stress physics - Books

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Residual stresses are stresses that remain after the original cause of the stresses has been removed. Residual stresses occur for a variety of reasons, including inelastic deformations and heat treatment. Heat from welding may cause localized expansion. When the finished weldment cools, some areas cool and contract more than others, leaving residual stresses. Castings may also have large residual stresses due to uneven cooling. While uncontrolled residual stresses are undesirable, many designs rely on them. For example, toughened glas ...

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Stress physics, Stress physics - Stress in one-dimensional bodies, Stress physics - Cauchy's principle, Stress physics - Plane stress, Stress physics - Principal stresses, Stress physics - Mohr's circle, Stress physics - Stress in three dimensions, Stress physics - Stress tensor, Stress physics - Generalized notation, Stress physics - Stress measurement, Stress physics - Units, Stress physics - Residual stress, Stress physics - Books

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Because the behavior of a body does not depend on the coordinates used to measure it, stress can be described by a tensor. The stress tensor is symmetric and can always be resolved into the sum of two symmetric tensors: a mean or hydrostatic stress tensor, involving only pure tension and compression; and a shear stress tensor, involving only shear stress. In the case of a fluid, Pascal's law shows that the hydrostatic stress is the same in all directions, at least to a first approximat ...

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Stress physics, Stress physics - Stress in one-dimensional bodies, Stress physics - Cauchy's principle, Stress physics - Plane stress, Stress physics - Principal stresses, Stress physics - Mohr's circle, Stress physics - Stress in three dimensions, Stress physics - Stress tensor, Stress physics - Generalized notation, Stress physics - Stress measurement, Stress physics - Units, Stress physics - Residual stress, Stress physics - Books

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The considerations above can be generalized to three dimensions. However, this is very complicated, since each shear loading produces shear stresses in one orientation and normal stresses in other orientations, and vice versa. Often, only certain components of stress will be important, depending on the material in question. The von Mises stress is derived from the distortion energy theory and is a simple way to combine stresses in three dimensions to calculate failure criteria of ductile materials. In this way, the strength of material in a 3-D state of stress can b ...

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Stress physics, Stress physics - Stress in one-dimensional bodies, Stress physics - Cauchy's principle, Stress physics - Plane stress, Stress physics - Principal stresses, Stress physics - Mohr's circle, Stress physics - Stress in three dimensions, Stress physics - Stress tensor, Stress physics - Generalized notation, Stress physics - Why is stress a symmetric tensor?, Stress physics - Stress measurement, Stress physics - Units, Stress physics - Residual stress, Stress physics - Books

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The considerations above can be generalized to three dimensions. However, this is very complicated, since each shear loading produces shear stresses in one orientation and normal stresses in other orientations, and vice versa. Often, only certain components of stress will be important, depending on the material in question. The von Mises stress is derived from the distortion energy theory and is a simple way to combine stresses in three dimensions to calculate failure criteria of ductile materials. In this way, the strength of material in a 3-D state of stress can b ...

See also:

Stress physics, Stress physics - Stress in one-dimensional bodies, Stress physics - Cauchy's principle, Stress physics - Plane stress, Stress physics - Principal stresses, Stress physics - Mohr's circle, Stress physics - Stress in three dimensions, Stress physics - Stress tensor, Stress physics - Generalized notation, Stress physics - Stress measurement, Stress physics - Units, Stress physics - Residual stress, Stress physics - Books

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The idea of stress originates in two simple, but important, observations of the loading (in tension) of a one-dimensional body, for example, a steel wire. When a wire is pulled tight, it stretches (undergoes strain). Up to a certain limit, the amount it stretches is proportional to the load divided by the cross-sectional area of the wire, σ = F/A. Failure occurs when the load exceeds a critical value for the material, the tensile strength multiplied by the cross-sectional area ...

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Stress physics, Stress physics - Stress in one-dimensional bodies, Stress physics - Cauchy's principle, Stress physics - Plane stress, Stress physics - Principal stresses, Stress physics - Mohr's circle, Stress physics - Stress in three dimensions, Stress physics - Stress tensor, Stress physics - Generalized notation, Stress physics - Why is stress a symmetric tensor?, Stress physics - Stress measurement, Stress physics - Units, Stress physics - Residual stress, Stress physics - Books

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Euler-Bernoulli beam equation - Definitions. x = location along the beam axis y = location perpendicular to beam and to loading z = location perpendicluar to beam, in load plane, with the axis origin at the centroid of the area of the cross-section ux = deflection along beam axis uSee also:

Euler-Bernoulli beam equation, Euler-Bernoulli beam equation - History, Euler-Bernoulli beam equation - Assumptions, Euler-Bernoulli beam equation - Predictions, Euler-Bernoulli beam equation - Definitions, Euler-Bernoulli beam equation - Final equations, Euler-Bernoulli beam equation - Derivation, Euler-Bernoulli beam equation - Practical simplifications, Euler-Bernoulli beam equation - Extensions

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The idea of stress originates in two simple, but important, observations of the loading (in tension) of a one-dimensional body, for example, a steel wire. When a wire is pulled tight, it stretches (undergoes strain). Up to a certain limit, the amount it stretches is proportional to the load divided by the cross-sectional area of the wire, σ = F/A. Failure occurs when the load exceeds a critical value for the material, the tensile strength multiplied by the cross-sectional area ...

See also:

Stress physics, Stress physics - Stress in one-dimensional bodies, Stress physics - Cauchy's principle, Stress physics - Plane stress, Stress physics - Principal stresses, Stress physics - Mohr's circle, Stress physics - Stress in three dimensions, Stress physics - Stress tensor, Stress physics - Generalized notation, Stress physics - Stress measurement, Stress physics - Units, Stress physics - Residual stress, Stress physics - Books

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Augustin Louis Cauchy enunciated the principle that, within a body, the forces that an enclosed volume imposes on the remainder of the material must be in equilibrium with the forces upon it from the remainder of the body. This intuition provides a route to characterizing and calculating complicated patterns of stress. To be exact, the stress at a point may be determined by considering a small element of the body that has an area ΔA, over which a force ΔF acts. By making the element infinitesimally small, the stress ve ...

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Stress physics, Stress physics - Stress in one-dimensional bodies, Stress physics - Cauchy's principle, Stress physics - Plane stress, Stress physics - Principal stresses, Stress physics - Mohr's circle, Stress physics - Stress in three dimensions, Stress physics - Stress tensor, Stress physics - Generalized notation, Stress physics - Why is stress a symmetric tensor?, Stress physics - Stress measurement, Stress physics - Units, Stress physics - Residual stress, Stress physics - Books

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Augustin Louis Cauchy enunciated the principle that, within a body, the forces that an enclosed volume imposes on the remainder of the material must be in equilibrium with the forces upon it from the remainder of the body. This intuition provides a route to characterizing and calculating complicated patterns of stress. To be exact, the stress at a point may be determined by considering a small element of the body that has an area ΔA, over which a force ΔF acts. By making the element infinitesimally small, the stress ve ...

See also:

Stress physics, Stress physics - Stress in one-dimensional bodies, Stress physics - Cauchy's principle, Stress physics - Plane stress, Stress physics - Principal stresses, Stress physics - Mohr's circle, Stress physics - Stress in three dimensions, Stress physics - Stress tensor, Stress physics - Generalized notation, Stress physics - Stress measurement, Stress physics - Units, Stress physics - Residual stress, Stress physics - Books

Read more here: » Stress physics: Encyclopedia II - Stress physics - Cauchy's principle

The full E-B beam equations are still too complicated for routine application, but they can easily be simplified further with additional assumptions about the loading and geometry. For example, for a rectangular cantilevered beam with a transverse tip load F, the equations reduce to occurring at the free tip (B), x = L occurring at the fixed root (A), x = 0 with Many books catalog simplified B-E equations for common structures. One of the best-kno ...

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Euler-Bernoulli beam equation, Euler-Bernoulli beam equation - History, Euler-Bernoulli beam equation - Assumptions, Euler-Bernoulli beam equation - Predictions, Euler-Bernoulli beam equation - Definitions, Euler-Bernoulli beam equation - Final equations, Euler-Bernoulli beam equation - Derivation, Euler-Bernoulli beam equation - Practical simplifications, Euler-Bernoulli beam equation - Extensions

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It is typically the result of working, mental stress, jet lag or active recreation, but also from boredom or disease or simply lack of sleep. It may also have chemical causes, such as poisoning or mineral or vitamin deficiencies. When chronic (meaning of six months or more duration) it is a symptom of nearly 30 different diseases. Post exertional fatigue, also known as exercise intolerance, is however far more rare, and is primarily found in organic brain diseases, mitochondrial disease, and neuromuscular disease. Chronic ...

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Fatigue physical, Fatigue physical - Types, Fatigue physical - Causes

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The full theory of elasticity is too complicated for routine design work. To simplify it, B-E beam theory makes six assumptions which are approximately true for most beams: The beam is long and slender. length >> width length >> depth therefore tensile/compressive stresses perpendicular to the beam are much smaller than tensile/compressive stresses parallel to the beam. The beam cross-section is constant along its axis. The beam is loaded in its plane of symmet ...

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Euler-Bernoulli beam equation, Euler-Bernoulli beam equation - History, Euler-Bernoulli beam equation - Assumptions, Euler-Bernoulli beam equation - Predictions, Euler-Bernoulli beam equation - Definitions, Euler-Bernoulli beam equation - Final equations, Euler-Bernoulli beam equation - Derivation, Euler-Bernoulli beam equation - Practical simplifications, Euler-Bernoulli beam equation - Extensions

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Urinary incontinence - Stress incontinence. Stress incontinence is incontinence that is caused by actions such as coughing, laughing, sneezing, exercising or other movements that increase intrabdominal pressure and thus increase pressure on the bladder. Physical changes resulting from pregnancy, childbirth, and menopause often cause stress incontinence. It is the most common form of incontinence in women and is treatable. The bladder is supported by muscles of the pelvic floor. If these muscles weaken, the ...

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Urinary incontinence, Urinary incontinence - Urinary incontinence in women, Urinary incontinence - Resources, Urinary incontinence - Types of incontinence, Urinary incontinence - Stress incontinence, Urinary incontinence - Urge incontinence, Urinary incontinence - Functional incontinence, Urinary incontinence - Overflow incontinence, Urinary incontinence - Other types of incontinence, Urinary incontinence - Diagnosis of incontinence, Urinary incontinence - Treatment of incontinence, Urinary incontinence - Exercises, Urinary incontinence - Electrical stimulation, Urinary incontinence - Biofeedback, Urinary incontinence - Timed voiding or bladder training, Urinary incontinence - Medications, Urinary incontinence - Pessaries, Urinary incontinence - Implants, Urinary incontinence - Surgery, Urinary incontinence - Catheterization, Urinary incontinence - Other procedures, Urinary incontinence - Urinary incontinence in children, Urinary incontinence - Causes of nighttime incontinence, Urinary incontinence - Slower physical development, Urinary incontinence - Excessive output of urine during sleep, Urinary incontinence - Anxiety, Urinary incontinence - Genetics, Urinary incontinence - Obstructive sleep apnea, Urinary incontinence - Structural problems, Urinary incontinence - Causes of daytime incontinence, Urinary incontinence - An overactive bladder, Urinary incontinence - Infrequent voiding, Urinary incontinence - Other causes, Urinary incontinence - Treatments for childhood urinary incontinence

Read more here: » Urinary incontinence: Encyclopedia II - Urinary incontinence - Types of incontinence

The prevailing consensus is that Galileo Galilei made the first attempts at developing a theory of beams, but recent studies argue that Leonardo da Vinci was the first to make the crucial observations. Da Vinci lacked Hooke's law and calculus to complete the theory, whereas Galileo was held back by an incorrect assumption he made. (Ref. Ballarini) Leonhard Euler and Daniel Bernoulli were the first to put together a useful theory circa 1750. At the time, science and industrial art were generally seen as very distinct fields, and there ...

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Euler-Bernoulli beam equation, Euler-Bernoulli beam equation - History, Euler-Bernoulli beam equation - Assumptions, Euler-Bernoulli beam equation - Predictions, Euler-Bernoulli beam equation - Definitions, Euler-Bernoulli beam equation - Final equations, Euler-Bernoulli beam equation - Derivation, Euler-Bernoulli beam equation - Practical simplifications, Euler-Bernoulli beam equation - Extensions

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Selye was able to separate the physical effects of stress from other physical symptoms suffered by patients through his research. He observed that patients suffered physical effects not caused directly by their disease or by their medical condition. Selye described the general adaptation syndrome as having three stages: alarm reaction, where the body detects the external stimuli adaptation, where the body engages defensive countermeasures against the stressor exhaustio ...

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Stress medicine, Stress medicine - Stress and its effects, Stress medicine - Stressors, Stress medicine - Coping with stress, Stress medicine - Neurochemistry and physiology, Stress medicine - Folklore of stress

Read more here: » Stress medicine: Encyclopedia II - Stress medicine - Stress and its effects

Selye was able to separate the physical effects of stress from other physical symptoms suffered by patients through his research. He observed that patients suffered physical effects not caused directly by their disease or by their medical condition. Selye described the general adaptation syndrome as having three stages: alarm reaction, where the body detects the external stimulus adaptation, where the body engages defensive countermeasures against the stressor exhaustio ...

See also:

Stress medicine, Stress medicine - Stress and its effects, Stress medicine - Stressors, Stress medicine - Coping with stress, Stress medicine - Neurochemistry and physiology, Stress medicine - Folklore of stress

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Urinary incontinence - Exercises. Kegel exercises to strengthen or retrain pelvic floor muscles and sphincter muscles can reduce or cure stress leakage. Women of all ages can learn and practice these exercises, which are taught by a health care professional. Most Kegel exercises do not require equipment. However, one technique involves the use of weighted cones. For this exercise, the patient stands and holds a cone-shaped object within her vagina. As the patient becomes accustomed to the weight, cones of increasing weight are substi ...

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Urinary incontinence, Urinary incontinence - Urinary incontinence in women, Urinary incontinence - Resources, Urinary incontinence - Types of incontinence, Urinary incontinence - Stress incontinence, Urinary incontinence - Urge incontinence, Urinary incontinence - Functional incontinence, Urinary incontinence - Overflow incontinence, Urinary incontinence - Other types of incontinence, Urinary incontinence - Diagnosis of incontinence, Urinary incontinence - Treatment of incontinence, Urinary incontinence - Exercises, Urinary incontinence - Electrical stimulation, Urinary incontinence - Biofeedback, Urinary incontinence - Timed voiding or bladder training, Urinary incontinence - Medications, Urinary incontinence - Pessaries, Urinary incontinence - Implants, Urinary incontinence - Surgery, Urinary incontinence - Catheterization, Urinary incontinence - Other procedures, Urinary incontinence - Urinary incontinence in children, Urinary incontinence - Causes of nighttime incontinence, Urinary incontinence - Slower physical development, Urinary incontinence - Excessive output of urine during sleep, Urinary incontinence - Anxiety, Urinary incontinence - Genetics, Urinary incontinence - Obstructive sleep apnea, Urinary incontinence - Structural problems, Urinary incontinence - Causes of daytime incontinence, Urinary incontinence - An overactive bladder, Urinary incontinence - Infrequent voiding, Urinary incontinence - Other causes, Urinary incontinence - Treatments for childhood urinary incontinence

Read more here: » Urinary incontinence: Encyclopedia II - Urinary incontinence - Treatment of incontinence

Women experience incontinence twice as often as men. Pregnancy and childbirth, menopause, and the structure of the female urinary tract account for this difference. But both women and men can become incontinent from neurologic injury, birth defects, strokes, multiple sclerosis, and physical problems associated with aging. While urinary incontince affects older women more often than younger women, the onset of incontinence is not inevitable with age. Incontinence is treatable and often curable at all ages. Women w ...

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Urinary incontinence, Urinary incontinence - Urinary incontinence in women, Urinary incontinence - Resources, Urinary incontinence - Types of incontinence, Urinary incontinence - Stress incontinence, Urinary incontinence - Urge incontinence, Urinary incontinence - Functional incontinence, Urinary incontinence - Overflow incontinence, Urinary incontinence - Other types of incontinence, Urinary incontinence - Diagnosis of incontinence, Urinary incontinence - Treatment of incontinence, Urinary incontinence - Exercises, Urinary incontinence - Electrical stimulation, Urinary incontinence - Biofeedback, Urinary incontinence - Timed voiding or bladder training, Urinary incontinence - Medications, Urinary incontinence - Pessaries, Urinary incontinence - Implants, Urinary incontinence - Surgery, Urinary incontinence - Catheterization, Urinary incontinence - Other procedures, Urinary incontinence - Urinary incontinence in children, Urinary incontinence - Causes of nighttime incontinence, Urinary incontinence - Slower physical development, Urinary incontinence - Excessive output of urine during sleep, Urinary incontinence - Anxiety, Urinary incontinence - Genetics, Urinary incontinence - Obstructive sleep apnea, Urinary incontinence - Structural problems, Urinary incontinence - Causes of daytime incontinence, Urinary incontinence - An overactive bladder, Urinary incontinence - Infrequent voiding, Urinary incontinence - Other causes, Urinary incontinence - Treatments for childhood urinary incontinence

Read more here: » Urinary incontinence: Encyclopedia II - Urinary incontinence - Urinary incontinence in women

Patients with incontinence should be referred to a medical practitioner specializing in this field. Urologists specialize in the urinary tract, and some urologists further specialize in the female urinary tract. Gynecologists and obstetricians specialize in the female reproductive tract and childbirth. A urogynecologist focuses on urological problems in women. Family practitioners and internists see patients for all kinds of ...

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Urinary incontinence, Urinary incontinence - Urinary incontinence in women, Urinary incontinence - Resources, Urinary incontinence - Types of incontinence, Urinary incontinence - Stress incontinence, Urinary incontinence - Urge incontinence, Urinary incontinence - Functional incontinence, Urinary incontinence - Overflow incontinence, Urinary incontinence - Other types of incontinence, Urinary incontinence - Diagnosis of incontinence, Urinary incontinence - Treatment of incontinence, Urinary incontinence - Exercises, Urinary incontinence - Electrical stimulation, Urinary incontinence - Biofeedback, Urinary incontinence - Timed voiding or bladder training, Urinary incontinence - Medications, Urinary incontinence - Pessaries, Urinary incontinence - Implants, Urinary incontinence - Surgery, Urinary incontinence - Catheterization, Urinary incontinence - Other procedures, Urinary incontinence - Urinary incontinence in children, Urinary incontinence - Causes of nighttime incontinence, Urinary incontinence - Slower physical development, Urinary incontinence - Excessive output of urine during sleep, Urinary incontinence - Anxiety, Urinary incontinence - Genetics, Urinary incontinence - Obstructive sleep apnea, Urinary incontinence - Structural problems, Urinary incontinence - Causes of daytime incontinence, Urinary incontinence - An overactive bladder, Urinary incontinence - Infrequent voiding, Urinary incontinence - Other causes, Urinary incontinence - Treatments for childhood urinary incontinence

Read more here: » Urinary incontinence: Encyclopedia II - Urinary incontinence - Diagnosis of incontinence

ICD-10 Chapter F: Mental and behavioural disorders - F00-F09 Organic including symptomatic mental disorders. (F00) Dementia in Alzheimer's disease (F01) Vascular dementia (F011) Multi-infarct dementia (F02) Dementia in other diseases classified elsewhere (F020) Dementia in Pick's disease (F021) Dementia in Creutzfeldt-Jakob disease (F022) Dementia in Huntington's disease (F023) Dementia in Parkinson's disease (F024) Dementia ...

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ICD-10 Chapter F: Mental and behavioural disorders, ICD-10 Chapter F: Mental and behavioural disorders - F00-F99 - Mental and behavioural disorders, ICD-10 Chapter F: Mental and behavioural disorders - F00-F09 Organic including symptomatic mental disorders, ICD-10 Chapter F: Mental and behavioural disorders - F10-F19 Mental and behavioural disorders due to psychoactive substance use, ICD-10 Chapter F: Mental and behavioural disorders - F20-F29 Schizophrenia schizotypal and delusional disorders, ICD-10 Chapter F: Mental and behavioural disorders - F30-F39 Mood affective disorders, ICD-10 Chapter F: Mental and behavioural disorders - F40-F48 Neurotic stress-related and somatoform disorders, ICD-10 Chapter F: Mental and behavioural disorders - F50-F59 Behavioural syndromes associated with physiological disturbances and physical factors, ICD-10 Chapter F: Mental and behavioural disorders - F60-F69 Disorders of adult personality and behaviour, ICD-10 Chapter F: Mental and behavioural disorders - F70-F79 Mental retardation, ICD-10 Chapter F: Mental and behavioural disorders - F80-F89 Disorders of psychological development, ICD-10 Chapter F: Mental and behavioural disorders - F90-F98 Behavioural and emotional disorders with onset usually occurring in childhood and adolescence, ICD-10 Chapter F: Mental and behavioural disorders - F99 Unspecified mental disorder

Read more here: » ICD-10 Chapter F: Mental and behavioural disorders: Encyclopedia II - ICD-10 Chapter F: Mental and behavioural disorders - F00-F99 - Mental and behavioural disorders