Dynamic variation of internal stress distribution in the curing process of epoxy resin using highly sensitive birefringence measurement system

1996 ◽  
Author(s):  
Shigekazu Yamagishi ◽  
Yasuhiro Sekine ◽  
Yongchang Zhu ◽  
Tatsuo Takada
Keyword(s):  
Stress Distribution ◽  
Epoxy Resin ◽  
Internal Stress ◽  
Measurement System ◽  
Curing Process ◽  
Dynamic Variation ◽  
Highly Sensitive

A dynamic DSC study of the curing process of epoxy resin

1997 ◽  
Vol 49 (1) ◽  
pp. 123-129 ◽  
Author(s):  
Susumu Tatsumiya ◽  
Katsumasa Yokokawa ◽  
Kyosuke Miki
Keyword(s):  
Epoxy Resin ◽  
Curing Process

scholarly journals Geometry and Dynamics of a Surge-type Glacier

1977 ◽  
Vol 18 (79) ◽  
pp. 181-194 ◽  
Author(s):  
R. Bindschadler ◽  
W. D. Harrison ◽  
C. F. Raymond ◽  
R. Crosson
Keyword(s):  
Steady State ◽  
Stress Distribution ◽  
Internal Stress ◽  
Ice Thickness ◽  
Surface Slope ◽  
Local Surface ◽  
Order Of Magnitude ◽  
Internal Deformation ◽  
Longitudinal Profiles ◽  
Similar Depth

AbstractMeasurement of geometry, motion, and mass balance from Variegated Glacier, Alaska portray conditions in this surge-type glacier close to the mid-point of its 20 year surge cycle. Comparison of longitudinal profiles of ice depth, surface slope, and surface speed indicate that the motion occurs largely by internal deformation assuming the ice deforms according to the experimental law of Glen. Surface speed is not noticeably affected by local surface slope on the scale of the ice thickness or smaller, but correlates well with slope determined on a longitudinal averaging scale about one order of magnitude larger than the ice depth. The rate of motion on Variegated Glacier agrees well with rates on non-surge type temperate glaciers which have similar depth and slope. Although the (low regime at the time of the measurements is apparently typical of temperate glaciers, a large discrepancy between the balance flux needed for steady state and the actual flux is indicative of a rapidly changing surface elevation profile and internal stress distribution.

Highly Sensitive ?R/R Measurement System for Nano-electro-Mechanical Cantilever Based Bio-sensors

2011 ◽  
Author(s):  
Sandeep Surya ◽  
Sudip Nag ◽  
Avil J. Fernandes ◽  
Sahir Gandhi ◽  
Dilip Agarwal ◽  
...  
Keyword(s):  
Measurement System ◽  
Highly Sensitive

Internal stress of epoxy resin modified with acrylic core-shell particles prepared by seeded emulsion polymerization

1986 ◽  
Vol 32 (5) ◽  
pp. 4865-4871 ◽  
Author(s):  
Yoshinobu Nakamura ◽  
Haruo Tabata ◽  
Hideto Suzuki ◽  
Kazuo Iko ◽  
Masayoshi Okubo ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Internal Stress ◽  
Emulsion Polymerization ◽  
Core Shell ◽  
Seeded Emulsion Polymerization ◽  
Shell Particles

Curing Process and Heat-Resistance of Polyethersulfone Toughened Epoxy Resins

2017 ◽  
Vol 898 ◽  
pp. 2302-2308
Author(s):  
Jin Li Zhou ◽  
Shu Zhu ◽  
Wen Pin Jia ◽  
Chao Cheng ◽  
Elwathig A.M. Hassan ◽  
...  
Keyword(s):  
Heat Resistance ◽  
Epoxy Resin ◽  
Thermo Gravimetric Analysis ◽  
Exothermic Peak ◽  
Curing Temperature ◽  
Gravimetric Analysis ◽  
Curing Process ◽  
Thermo Gravimetric ◽  
Rich Phase ◽  
Curing Reaction

In order to improve the toughness of epoxy resin, hydroxyl-terminated polyethersulfone (PES) with various amounts (0 wt.%, 5 wt.%, 10 wt.%, 15 wt.%, 20 wt.%) were added to bisphenol A epoxy resin (DER331)/ curing agent DETDA (E100) systems, and the influence of PES contents on curing process and heat-resistance was studied. Non-isothermal DSC was used to determine the curing process of uncured DER331/E100/PES systems at heating rate of 2°C/min, 5°C/min, 7°C/min, 10°C/min and 15°C/min separately, and the apparent activation energy was calculated based on Kissinger method. The morphology of the etched cured DER331/E100/PES systems with different PES contents was observed by SEM. The heat-resistance of these systems was investigated by DSC and TGA. The results showed that with the increasing of PES content the curing exothermic peak, the heat of curing reaction, the initial and final curing temperature all decreased at the first and then increased, indicating that when the PES content was low (5 wt.%, 10 wt.%), PES can facilitate the curing process, while, when PES content up to 15 wt.%, PES can prevent or weaken the curing reaction. SEM results indicated that the phase structure changed drastically depending on the PES content. The systems with 5 wt.% and 10 wt.% PES were epoxy-rich phase, with 15 wt.% PES was co-continuity phase, and with 20 wt.% PES showed complete phase inversion (PES rich phase). The glass transition temperature and thermo gravimetric analysis demonstrated that the addition of PES can increase the heat resistance of cured DER331/E100/PES systems.

Foot internal stress distribution during impact in barefoot running as function of the strike pattern

2018 ◽  
Vol 21 (7) ◽  
pp. 471-478 ◽  
Author(s):  
Enrique Morales-Orcajo ◽  
Ricardo Becerro de Bengoa Vallejo ◽  
Marta Losa Iglesias ◽  
Javier Bayod ◽  
Estevam Barbosa de Las Casas
Keyword(s):  
Stress Distribution ◽  
Internal Stress ◽  
Barefoot Running
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