fix signs (#65)

Wells-Group · Apr 22, 2022 · 85badf2 · 85badf2
1 parent 92e5f6b
commit 85badf2
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Showing 2 changed files with 2 additions and 2 deletions.
diff --git a/cpp/contact_kernels.hpp b/cpp/contact_kernels.hpp
@@ -478,7 +478,7 @@ dolfinx_cuas::kernel_fn<T> generate_contact_kernel(
         {
           double sign_du = (lmbda * tr(j, l) * n_dot + mu * epsn(j, l));
           double Pn_du
-              = (gamma_inv * sign_du - n_surf(l) * phi_f(q, j)) * -Pn_u * w0;
+              = (gamma_inv * sign_du - n_surf(l) * phi_f(q, j)) * Pn_u * w0;
           sign_du *= w0;
           for (int i = 0; i < ndofs_cell; i++)
           { // Insert over block size in matrix

diff --git a/cpp/utils.cpp b/cpp/utils.cpp
@@ -252,7 +252,7 @@ double dolfinx_contact::R_plus(double x) { return 0.5 * (std::abs(x) + x); }
 //-------------------------------------------------------------------------------------
 double dolfinx_contact::R_minus(double x) { return 0.5 * (x - std::abs(x)); }
 //-------------------------------------------------------------------------------------
-double dolfinx_contact::dR_minus(double x) { return -double(x < 0); }
+double dolfinx_contact::dR_minus(double x) { return double(x < 0); }
 //-------------------------------------------------------------------------------------
 
 double dolfinx_contact::dR_plus(double x) { return double(x > 0); }