Results 181 to 190 of about 84,530 (198)
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Plastic Deformation in Polymers
1964The mechanical properties of polymers, and all matter in general, can be treated from two distinct points of view, namely, the continuum point of view and the structural approach. Each approach has distinct advantages and, indeed, they are complementary.
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Dislocations and plastic deformation
Physics Today, 1953Our understanding of the plastic behavior of solids has lagged well behind the knowledge gained in other branches of solid state physics. Electrical, thermal, elastic, magnetic, and optical properties are explained in terms of a few basic concepts such as the vibrations of atoms and the motion and spin of electrons.
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1999
Plastic deformation can be defined as a non-recoverable deformation which leads to a permanent ‘set’. Conventionally yield occurs when a given stress, the yield point, is exceeded as illustrated in Figure 1. For most polymers the tensile yielding behaviour is better described by curve (B) in which yield is followed by a load drop in the nominal stress ...
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Plastic deformation can be defined as a non-recoverable deformation which leads to a permanent ‘set’. Conventionally yield occurs when a given stress, the yield point, is exceeded as illustrated in Figure 1. For most polymers the tensile yielding behaviour is better described by curve (B) in which yield is followed by a load drop in the nominal stress ...
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Kinetics of Plastic Deformation
2018Study of the kinetics of plastic deformation is of considerable technological significance: useful shapes are imparted to metallic materials by plastic deformation, and the useful life of a high-temperature component may be limited by plastic deformation to unacceptable levels, or even fracture.
Saradindukumar Ray, Hem Shanker Ray
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Crystalline Plasticity and Structured Deformations
2004The connection between the geometrical changes at small length scales in single crystals and their macroscopic response has been the subject of extensive experimental studies. In (Deseri and Owen (2000)), experimental evidence that points to a connection between hardening behavior of single crystals undergoing single slip and changes in the separation ...
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Heterogeneity in Plastic Deformation
Materials Science Forum, 2006Jidong Kang +4 more
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Fracture and Mesoscopic Plastic Deformation
2001This article discusses some recent advances in the understanding of plastic deformation near a crack tip at a mesoscopic scale. This is a scale that is in between the engineering macroscopic scale and the microscopic scale of the atomic description used by physicists.
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1970
The classical theory of plasticity is based on the concept of a yield criterion f(б ij )= k , where б ij is the stress tensor and k is a material constant, which is in general a function of the previous strain history. For an isotropic material, the function f may be expressed in terms of the three invariants I1, I2, I3, of the stress tensor ...
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The classical theory of plasticity is based on the concept of a yield criterion f(б ij )= k , where б ij is the stress tensor and k is a material constant, which is in general a function of the previous strain history. For an isotropic material, the function f may be expressed in terms of the three invariants I1, I2, I3, of the stress tensor ...
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Plastic Deformation Mechanisms
2019This chapter begins with an introduction of the crystalline structure and crystalline defects of solid materials and the definition of hot and cold work. Then, a full description of the dislocation slip mechanism is presented, including an explanation of the direct observation of dislocations by transmission electron microscopy.
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