expository
发表于 2025-3-28 14:53:02
Sheet Necking-II. Time-Independent Behaviord both the flow theory of plasticity as well as a finite-strain version of deformation theory are considered. A localization-band bifurcation analysis is first carried out. The influence of geometric imperfections is then analyzed using the long-wavelength approximation treated in Part I. We also di
善于骗人
发表于 2025-3-28 21:48:16
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愤愤不平
发表于 2025-3-29 01:53:31
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协定
发表于 2025-3-29 06:43:25
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胡言乱语
发表于 2025-3-29 08:15:43
Limits to Ductility Set by Plastic Flow Localizationnal shear band localizations that sometimes mark the onset of ductile rupture. Both bifurcation behavior and the growth of initial imperfections are considered. In addition to analyses based on classical Mises-like constitutive laws, we discuss approaches to localization based on constitutive models
alleviate
发表于 2025-3-29 12:41:41
Sheet Necking-III. Strain-Rate Effectstheory and deformation theory are employed in an analysis of the growth of long-wavelength nonuniformities. Material strain-rate sensitivity is seen to substantially increase the predicted limit strains beyond their corresponding values for time-independent material response. We also discuss the inf
condescend
发表于 2025-3-29 18:08:54
Plastic Flow Properties in Relation to Localized Necking in Sheetspendence on the imposed stress-state. Marciniak’s model of imperfection growth has successfully explained the rise in forming limit as the imposed strain-ratio (ε./ε.) is increased from zero (plane strain) toward unity (balanced biaxial tension). Experimental studies on formability of various materi
镇压
发表于 2025-3-29 23:00:39
Deformation Analysis of Large Sized Panels in the Press Shoples of applying these results to analysis of actual press forming operations. The forming limit is defined as the amount of strain at which a pronounced roughening in surface finish occurs. This roughening signals the onset of necking as determined by means of stylus instrument measurement and visua
Stress-Fracture
发表于 2025-3-30 03:54:39
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联想记忆
发表于 2025-3-30 07:13:05
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