Anisotropic and strain rate-dependent mechanical properties and constitutive modeling of the cancellous bone from piglet cervical vertebrae

2020 ◽  
Vol 188 ◽  
pp. 105279 ◽  
Author(s):  
Zhigang Li ◽  
Jinjin Wang ◽  
Guanghui Song ◽  
Cheng Ji ◽  
Xinfeng Han
Keyword(s):  
Mechanical Properties ◽  
Strain Rate ◽  
Cancellous Bone ◽  
Constitutive Modeling ◽  
Cervical Vertebrae ◽  
Rate Dependent

scholarly journals Strain-Rate-Dependent Deformation Behavior and Mechanical Properties of a Multi-Phase Medium-Manganese Steel

Metals ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 344 ◽  
Author(s):  
Simon Sevsek ◽  
Christian Haase ◽  
Wolfgang Bleck
Keyword(s):  
Mechanical Properties ◽  
Strain Rate ◽  
Strain Rate Sensitivity ◽  
Deformation Behavior ◽  
Rate Sensitivity ◽  
Manganese Steel ◽  
Strain Rates ◽  
Rate Dependent ◽  
Medium Manganese Steel ◽  
Multi Phase

The strain-rate-dependent deformation behavior of an intercritically annealed X6MnAl12-3 medium-manganese steel was analyzed with respect to the mechanical properties, activation of deformation-induced martensitic phase transformation, and strain localization behavior. Intercritical annealing at 675 °C for 2 h led to an ultrafine-grained multi-phase microstructure with 45% of mostly equiaxed, recrystallized austenite and 55% ferrite or recovered, lamellar martensite. In-situ digital image correlation methods during tensile tests revealed strain localization behavior during the discontinuous elastic-plastic transition, which was due to the localization of strain in the softer austenite in the early stages of plastic deformation. The dependence of the macroscopic mechanical properties on the strain rate is due to the strain-rate sensitivity of the microscopic deformation behavior. On the one hand, the deformation-induced phase transformation of austenite to martensite showed a clear strain-rate dependency and was partially suppressed at very low and very high strain rates. On the other hand, the strain-rate-dependent relative strength of ferrite and martensite compared to austenite influenced the strain partitioning during plastic deformation, and subsequently, the work-hardening rate. As a result, the tested X6MnAl12-3 medium-manganese steel showed a negative strain-rate sensitivity at very low to medium strain rates and a positive strain-rate sensitivity at medium to high strain rates.

Temperature and strain-rate dependent mechanical properties of single-layer borophene

2018 ◽  
Vol 19 ◽  
pp. 39-45 ◽  
Author(s):  
Zhen-Dong Sha ◽  
Qing-Xiang Pei ◽  
Kun Zhou ◽  
Zhili Dong ◽  
Yong-Wei Zhang
Keyword(s):  
Mechanical Properties ◽  
Strain Rate ◽  
Single Layer ◽  
Rate Dependent

scholarly journals Strain Rate Dependent Mechanical Properties of TWIP Steel

JOM ◽  
2018 ◽  
Vol 71 (4) ◽  
pp. 1291-1302 ◽  
Author(s):  
Manjunatha Madivala ◽  
Wolfgang Bleck
Keyword(s):  
Mechanical Properties ◽  
Strain Rate ◽  
Twip Steel ◽  
Rate Dependent

Effect of Ultrasound and Strain Rate on Tensile Behavior of Neat Thermoplastic Polyurethane Thin Films

2010 ◽  
Author(s):  
Anandh Balakrishnan ◽  
Mrinal C. Saha
Keyword(s):  
Thin Films ◽  
Mechanical Properties ◽  
Strain Rate ◽  
Mechanical Test ◽  
Thermoplastic Polyurethane ◽  
Optical Element ◽  
Mechanical Tests ◽  
Primary Objective ◽  
Scanning Calorimetry ◽  
Rate Dependent

Thermoplastic Polyurethane (TPU) thin films have many applications in engineering and biomedical fields. Examples include moisture sensors, load cells, optical element and biocompatible stens. The TPU is a block copolymer naturally phase segregates into thermodynamically incompatible hard- and soft-segments. The size of the segments and their spatial distribution can significantly affect the microstructure and mechanical properties of the TPU. In this paper, we propose to investigate the effect of ultrasound energy on mechanical properties of TPU thin films fabricated via a solution route utilizing Tetra Hydro Furan (THF) as a solvent. The times of sonication was fixed at 60 minutes whilst all films were fabricated at average thickness of 20+/-5 um. The primary objective of the study was to understand the influence of ultrasound and strain rates on the material microstructure and the resulting mechanical properties. Mechanical tests have been conducted at two different displacement rates, namely 5 and 10 mm/min. Our preliminary results indicate that ultrasound improves the strength of the neat TPU films. We also see that strain hardening is displacement or strain rate dependent. We attribute these results to changes in the hard (H) and soft (S) domain structure. To further understand these microstructural variations, we propose to conduct Differential Scanning Calorimetry (DSC). The data has been interpreted in conjunction with our mechanical test data.

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