Macromolecular Materials and Engineering, EarlyView.This study compares the stretching structural evolution of two iPPs with distinct isotacticities. Deformation from spherulite to fibrillar crystal induces rapid thickening of lamellae (Lc), reduction in amorphous thickness (La), and transverse dimension (Lh).
Cheng Yao +4 more
wiley +1 more source
STUDY ON LIFE PREDICTION AND FATIGUE TEST OF ZM6 MATERIAL WITH IMPACT PIT
Jixie qiangdu, 2021 The smooth specimens,notched specimens and impact crater specimens of ZM6 material were prepared. The fatigue test of these specimens was carried out,and the fatigue life of these specimens under different stress levels was obtained.Based on the theory ...
LI Jian +4 more
doaj
Boltish Impact Structure and its impact-melting rocks
Геофизический журнал, 2011 The Boltysh crater in the central part of the Ukrainian Shield is a complex impact structure composed by a deep inner crater with a central uplift and a peripheral depression.
E. P. Gurov +2 more
doaj +1 more source
Interfacial Energy and Composition Controlled Self‐Stratification in Polyurethane Coatings
Macromolecular Materials and Engineering, EarlyView.This study elucidates self‐stratification in polyurethane coatings driven by interfacial energies and composition‐dependent phase separation. Using XPS, SIMS, and Raman analyses, we reveal rapid formation of hydrophobic and hydrophilic layers and substrate‐dependent interfacial structures.
Gaurav Singhal +11 more
wiley +1 more source
A Peridynamic Framework for Modeling Progressive Failure in Porous Sandstone Indentation
International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.ABSTRACT A state‐based peridynamic model is proposed to simulate the failure mechanisms in porous rocks, using Bentheim sandstone as a specific example. Experimental observations reveal a transition from brittle to ductile failure under increasing triaxial compression. This behavior is attributed to pore compaction. The peridynamic model is enhanced to
Sahir N. Butt +2 more
wiley +1 more source
Bilateral symmetry of circular impact structures of astroblemes [PDF]
The relief of the true crater-bottom and the distribution of impactites and allogenic breccias for the Popigay and Kara astroblemes is examined. It is shown that the crater morphology and the distribution of ejecta of fragmented and melted masses has a ...
Masaytis, V. L., Mashchak, M. S.
core +1 more source
Radiometric Constraints on the Timing, Tempo, and Effects of Large Igneous Province Emplacement
Geophysical Monograph Series, Page 27-82., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Jennifer Kasbohm +2 more
wiley +2 more sources
Dynamics of shallow impact cratering
Physical Review E, 2005 We present data for the time-dependence of wooden spheres penetrating into a loose non-cohesive packing of glass beads. The stopping time is a factor of three longer than the time $d/v_\circ$ needed to travel the total penetration distance $d$ at the impact speed $v_\circ$. The acceleration decreases monotonically throughout the impact.
Kamien, Randall D +2 more
openaire +5 more sources
Polymer Composites, EarlyView.Comparison of experimental and model‐predicted erosion rates for carbon fibre‐reinforced polymer (CFRP) and glass fibre‐reinforced polymer (GFRP) under low‐velocity (2 m/s) and at varying angles and sand concentrations (0.0, 0.05, 0.4 g/L). The results demonstrate good agreement between experimental data and model predictions across different erosive ...
Ali Al‐Darraji +4 more
wiley +1 more source
Morphological Features-Based Descriptive Index System for Lunar Impact Craters
ISPRS International Journal of Geo-Information, 2017 Lunar impact craters are important for studying lunar surface morphology because they are the most typical morphological units of the Moon. Impact crater descriptive indices can be used to describe morphological features and thus provide direct evidence ...
Min Chen +5 more
doaj +1 more source