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Chapter 18

Stress and Strain - Axial Loading

מאמץ רגיל תחת עומס צירית
מאמץ רגיל תחת עומס צירית
A rod subjected to a load undergoes elongation. A load-deformation diagram can represent the elongation but cannot predict deformation in different rods. ...
דיאגרמת מתח-מתח
דיאגרמת מתח-מתח
Consider a cylindrical specimen placed in a system to measure its tensile strength. Two gauge marks are inscribed on the central portion of the specimen. ...
דיאגרמת מתח-מתח - חומרים רקיעים
דיאגרמת מתח-מתח - חומרים רקיעים
When a specimen is subjected to loading the length first increases linearly at a slow rate, resulting in an initial straight line with a steep slope on ...
דיאגרמת מתח-מתח - חומרים שבירים
דיאגרמת מתח-מתח - חומרים שבירים
Brittle materials, under tensile stress, do not elongate much before rupturing, meaning their ultimate and breaking strengths are identical. Compared with ...
מתח אמיתי ומתח אמיתי
מתח אמיתי ומתח אמיתי
Engineering stress is the ratio of the load and the undeformed original cross-sectional area. Engineering stress approximates strain which represents the ...
חוק הוק
חוק הוק
Hooke's law states that stress applied to a material is directly proportional to the strain it experiences within the elastic limit. For ductile ...
התנהגות פלסטיק
התנהגות פלסטיק
Materials under stress due to tensile loading exhibit elastic and linear behavior until the yield point. Removing the load at the yield point, stress and ...
עייפות
עייפות
Fatigue occurs when the materials, under repeated loads for thousands or millions of cycles, rupture at a stress level much lower than the material's ...
עיוות של חבר תחת עומסים מרובים
עיוות של חבר תחת עומסים מרובים
The deformation of a rod with different materials and cross-sections is computed by dividing it into parts, each characterized by individual parameters. ...
פתרון בעיות לא מוגדר באופן סטטי
פתרון בעיות לא מוגדר באופן סטטי
Consider two cylindrical rods, one of steel and another of brass, joined at point B and restrained by rigid supports at points A and C. Determine the ...
זן תרמי
זן תרמי
A homogeneous rod with a uniform cross-section, resting freely on a horizontal surface, expands when heated. The expansion is proportional to the ...
דפורמציה תלוית טמפרטורה
דפורמציה תלוית טמפרטורה
Consider a non-homogenous rod made of steel and brass, restrained at both ends and subjected to a temperature change. The stress and load on the rod are ...
היחס של פואסון
היחס של פואסון
When a slender bar is subjected to an axial load, the bar material undergoes axial strain, causing it to deform in the axial direction. Simultaneously, ...
חוק הוק כללי
חוק הוק כללי
The generalized Hooke's Law extends Hooke's Law to all stress types and directions, aiding in understanding materials under multiaxial stress ...
מודולוס בתפזורת
מודולוס בתפזורת
The bulk modulus measures a material's resistance to uniform compression. It is defined as the proportionality constant between a change in pressure ...
זן גזירה
זן גזירה
In a cubic element with a general state of stress, the shearing stresses can deform a cube into an oblique parallelepiped without affecting normal ...
הקשר בין יחס פואסון, מודולוס האלסטיות ומודולוס הנוקשות
הקשר בין יחס פואסון, מודולוס האלסטיות ומודולוס הנוקשות
A slender bar subjected to an axial load undergoes deformation in the axial and transverse directions. The deformation affects the cubic elements within ...
עקרון סן-ונאנט
עקרון סן-ונאנט
Consider a member with plates on both ends. When loads are applied centrally on the plates, they move towards each other without rotating, causing the ...
ריכוזי מתח
ריכוזי מתח
Stress concentration refers to the amplification of stress in a structural member near points of discontinuity, such as holes or abrupt changes in ...
לחצים שיוריים
לחצים שיוריים
When a rod is stretched beyond its yield point, it permanently deforms and doesn't regain its original length. The stresses created during loading are ...
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