Estimation of Long-Term Stiffness of Storage Aged GFRP Composite Samples Immersed in HCl Acid by TTSP Method

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td align="left">Time (week)</td><td align="center">Temperature (°C)</td><td align="center"><i>E</i> (MPa)</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td align="left" rowspan="3">1</td><td align="center">35</td><td align="center">3500</td></tr><tr><td align="center">50</td><td align="center">3400</td></tr><tr><td align="center">75</td><td align="center">3100</td></tr><tr><td align="left" rowspan="3">2</td><td align="center">35</td><td align="center">3200</td></tr><tr><td align="center">50</td><td align="center">2800</td></tr><tr><td align="center">75</td><td align="center">2600</td></tr><tr><td align="left" rowspan="3">3</td><td align="center">35</td><td align="center">3100</td></tr><tr><td align="center">50</td><td align="center">2600</td></tr><tr><td align="center">75</td><td align="center">2400</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Experimental modulus of elasticity of the samples after immersion in acid.

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Table 3

Table 3: Estimation of Long-Term Stiffness of Storage Aged GFRP Composite Samples Immersed in HCl Acid by TTSP Method 